diff --git a/author/Luigi-Malomo/index.xml b/author/Luigi-Malomo/index.xml index eadf523847..644e2ea043 100644 --- a/author/Luigi-Malomo/index.xml +++ b/author/Luigi-Malomo/index.xml @@ -1,4 +1 @@ -Luigi Malomo | Visual Computing Labhttp://vcg.isti.cnr.it/author/Luigi-Malomo/Luigi MalomoWowchemy (https://wowchemy.com)en-usThu, 01 Feb 2024 00:00:00 +0000http://vcg.isti.cnr.it/author/Luigi-Malomo/avatar_hudf86bfd8321a2e8b7864356025fde3c8_58810_270x270_fill_q75_lanczos_center.jpgLuigi Malomohttp://vcg.isti.cnr.it/author/Luigi-Malomo/Digital Fabricationhttp://vcg.isti.cnr.it/research/digital-fabrication/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/research/digital-fabrication/<p>VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects. Activity on 3D acquisition started at VC Lab on mid &rsquo;90s; we have designed a low-cost 3D scanner and proposed many new algorithms for processing sampled 3D data.</p> -<p>Most of those results later on have been incorporated in the MeshLab system, together with other geometry processing results. MeshLab is an open source system for processing and editing 3D triangular meshes; it has more than 10 years of life and a very consolidated and wide community of users (totalling more than 100,000 download every year).</p> -<p>We have been also active on some advanced 2D media, such as the Reflection Transformation Images (RTI):</p> -<p>We present below links and brief presentation of some recent results.</p> \ No newline at end of file +Luigi Malomo | Visual Computing Labhttp://vcg.isti.cnr.it/author/Luigi-Malomo/Luigi MalomoWowchemy (https://wowchemy.com)en-usThu, 01 Feb 2024 00:00:00 +0000http://vcg.isti.cnr.it/author/Luigi-Malomo/avatar_hudf86bfd8321a2e8b7864356025fde3c8_58810_270x270_fill_q75_lanczos_center.jpgLuigi Malomohttp://vcg.isti.cnr.it/author/Luigi-Malomo/Digital Fabricationhttp://vcg.isti.cnr.it/research/digital-fabrication/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/research/digital-fabrication/<p>VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects. Activity on 3D acquisition started at VC Lab on mid &rsquo;90s; we have designed a low-cost 3D scanner and proposed many new algorithms for processing sampled 3D data.</p> \ No newline at end of file diff --git a/index.json b/index.json index 7ed75169a4..d27a812ed1 100644 --- a/index.json +++ b/index.json @@ -1 +1 @@ -[{"authors":null,"categories":null,"content":"I am currently enrolled in the Italian National PhD in Artificial Intelligence at the University of Pisa. My research focuses on the development of AI-based tools for assisted architectual design, with the purpose of enhancing the architect’s creativity towards the production of buildable shapes.\n","date":1706745600,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1706745600,"objectID":"2d86b1749cfddae9355078f6d988aebe","permalink":"http://vcg.isti.cnr.it/author/Andrea-Favilli/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Andrea-Favilli/","section":"authors","summary":"I am currently enrolled in the Italian National PhD in Artificial Intelligence at the University of Pisa. My research focuses on the development of AI-based tools for assisted architectual design, with the purpose of enhancing the architect’s creativity towards the production of buildable shapes.","tags":null,"title":"Andrea Favilli","type":"authors"},{"authors":null,"categories":null,"content":"Daniela Giorgi is a Senior Researcher at the Visual Computing Lab at CNR-ISTI (National Research Council of Italy, Institute of Information Science and Technologies). Her research interests include Computer Graphics; 3D Shape Analysis; Computational Topology; Artificial Intelligence; Geometric and 3D Deep Learning. She has authored more than 70 peer-reviewed papers published in international journals and conferences. Currently, she is a WP Leader for the Horizon Europe Project SUN (Social and hUman ceNtered XR), and a Principal Investigator in the PNRR Extended Partnership FAIR - Future Artificial Intelligence Research. In 2022, she was elected President of the Italian Chapter of the European Association for Computer Graphics (Eurographics).\n","date":1706745600,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1706745600,"objectID":"98bc2bf762131f8a84cd136f728a5f12","permalink":"http://vcg.isti.cnr.it/author/Daniela-Giorgi/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Daniela-Giorgi/","section":"authors","summary":"Daniela Giorgi is a Senior Researcher at the Visual Computing Lab at CNR-ISTI (National Research Council of Italy, Institute of Information Science and Technologies). Her research interests include Computer Graphics; 3D Shape Analysis; Computational Topology; Artificial Intelligence; Geometric and 3D Deep Learning.","tags":null,"title":"Daniela Giorgi","type":"authors"},{"authors":null,"categories":null,"content":"I am Post-Doctoral Researcher at the ISTI - CNR in Pisa. My research focuses on Architectural Geometry, which is an interdisciplinary topic that aims to design, model, optimize, and manufacture complex free-form architectures through the tight collaboration and the synergy of several disciplines, such as differential geometry, algorithmic mathematics, computer graphics, engineering and industrial practice. I am also Adjunct Professor at the University of Pisa.\n","date":1706745600,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1706745600,"objectID":"d82644a7b8a8920bf3bd62dc5961b57d","permalink":"http://vcg.isti.cnr.it/author/Francesco-Laccone/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Francesco-Laccone/","section":"authors","summary":"I am Post-Doctoral Researcher at the ISTI - CNR in Pisa. My research focuses on Architectural Geometry, which is an interdisciplinary topic that aims to design, model, optimize, and manufacture complex free-form architectures through the tight collaboration and the synergy of several disciplines, such as differential geometry, algorithmic mathematics, computer graphics, engineering and industrial practice.","tags":null,"title":"Francesco Laccone","type":"authors"},{"authors":null,"categories":null,"content":"Dr. Luigi Malomo is a permanent researcher at the Visual Computing Laboratory of ISTI - CNR, in Pisa Italy. He received the PhD in Computer Science from the University of Pisa in April 2017. His research focuses mainly on Computational Fabrication and covers many topics related to computer graphics like geometry processing, human-computer interfaces, meshing and parametrizations. Currently, the scope of his research is to apply computational geometry knowledge to tangible applications like the optimization of manufacturing processes and physically-based geometric design.\n","date":1706745600,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1706745600,"objectID":"f465d64b94117bb5d1db37d5772afd28","permalink":"http://vcg.isti.cnr.it/author/Luigi-Malomo/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Luigi-Malomo/","section":"authors","summary":"Dr. Luigi Malomo is a permanent researcher at the Visual Computing Laboratory of ISTI - CNR, in Pisa Italy. He received the PhD in Computer Science from the University of Pisa in April 2017.","tags":null,"title":"Luigi Malomo","type":"authors"},{"authors":["paolo-cignoni"],"categories":null,"content":"Dr. Paolo Cignoni is a Research Director with CNR-ISTI where he leads the Visual Computing Laboratory. He received a Ph.D. Degree in Computer Science at the University of Pisa in 1998. He has been awarded “Best Young Researcher” by the Eurographics association in 2004. His research interests cover many Computer Graphics fields like geometry processing, 3D scanning data processing, digital fabrication, scientific visualisation and digital heritage. He teaches the main 3D Graphics course at the University of Pisa since more than 10 years.\nHe started and still leads the development of MeshLab, a widely known open source mesh processing tool used in hundreds of universities, research centers and companies by thousands of users. He has published more than one hundred papers in international refereed journals/conferences and has served in the program committee of all the most important conferences of Computer Graphics. He is member of Eurographics Executive Committee, and he has been in the Editorial Board of IEEE TVCG, Computer Graphics Forum, and ACM Journal on Computing and Cultural Heritage. A project\n","date":1706745600,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1706745600,"objectID":"0dcfef319fdb688d525c672763da8a51","permalink":"http://vcg.isti.cnr.it/author/Paolo-Cignoni/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Paolo-Cignoni/","section":"authors","summary":"Dr. Paolo Cignoni is a Research Director with CNR-ISTI where he leads the Visual Computing Laboratory. He received a Ph.D. Degree in Computer Science at the University of Pisa in 1998.","tags":null,"title":"Paolo Cignoni","type":"authors"},{"authors":null,"categories":null,"content":"Arslan Siddique joined Visual Computing Lab as a Marie Curie PhD fellow in EVOCATION ITN. Currently, he is in the final year of his PhD Computer Science at University of Pisa. His research focuses on Structure from Motion and 3D reconstruction. He is working on the development of MoReLab, which is a software for user-assisted 3D reconstruction.\n","date":1689552e3,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1689552e3,"objectID":"ca5a012ece1bf6c7c6cbf923d1e7fe16","permalink":"http://vcg.isti.cnr.it/author/Arslan-Siddique/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Arslan-Siddique/","section":"authors","summary":"Arslan Siddique joined Visual Computing Lab as a Marie Curie PhD fellow in EVOCATION ITN. Currently, he is in the final year of his PhD Computer Science at University of Pisa.","tags":null,"title":"Arslan Siddique","type":"authors"},{"authors":null,"categories":null,"content":"Francesco Banterle is a Researcher at the Visual Computing Laboratory at ISTI-CNR, Italy. He received a Ph.D. in Engineering from Warwick University in 2009. During his Ph.D. he developed Inverse Tone Mapping that bridges the gap between Low Dynamic Range Imaging and High Dynamic Range (HDR) Imaging. He holds two patents, one sold to Dolby, and the other one of these was transferred to goHDR, which he co-founded in 2009. His main research fields are high dynamic range (HDR) imaging (acquisition, tone mapping, HDR video compression, and HDR monitors), augmented reality on mobile, and rendering (global illumination, and image-based lighting). Recently, he has been working on applying Deep Learning to imaging; i.e., the distillation of perceptual metrics, efficient video structure-from-motion, and relighting of portraits.\n","date":1689552e3,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1689552e3,"objectID":"fb3a5bdff6f5bae4a4844a3a2033d92e","permalink":"http://vcg.isti.cnr.it/author/Francesco-Banterle/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Francesco-Banterle/","section":"authors","summary":"Francesco Banterle is a Researcher at the Visual Computing Laboratory at ISTI-CNR, Italy. He received a Ph.D. in Engineering from Warwick University in 2009. During his Ph.D. he developed Inverse Tone Mapping that bridges the gap between Low Dynamic Range Imaging and High Dynamic Range (HDR) Imaging.","tags":null,"title":"Francesco Banterle","type":"authors"},{"authors":null,"categories":null,"content":"Massimiliano Corsini is a senior researcher at the Visual Computing Laboratory of the ISTI-CNR in Pisa, Italy.\nFor several years, he worked on appearance and shape acquisition of real objects, advanced visualization for Cultural Heritage applications, and visual media productions. His current research regards the applications of Artificial Intelligence, Computer Graphics, and Computer Vision to Environmental Monitoring, Digital Humanities, Mobile Robotics, and Visual Analytics.\n","date":1689552e3,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1689552e3,"objectID":"35a03bee722ecfa4cf38765ff25e3a72","permalink":"http://vcg.isti.cnr.it/author/Massimiliano-Corsini/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Massimiliano-Corsini/","section":"authors","summary":"Massimiliano Corsini is a senior researcher at the Visual Computing Laboratory of the ISTI-CNR in Pisa, Italy.\nFor several years, he worked on appearance and shape acquisition of real objects, advanced visualization for Cultural Heritage applications, and visual media productions.","tags":null,"title":"Massimiliano Corsini","type":"authors"},{"authors":null,"categories":null,"content":"Fabio Ganovelli is a Senior Researcher at the Visual Computing Laboratory of ISTI-CNR (Institute of Science and Technologies of Information - National Research Council) in Pisa, Italy.\nHe holds a Ph.D. in computer science from the University of Pisa, and a Master’s Degree in computer science from the University of Pisa.\n","date":1672531200,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1672531200,"objectID":"00cfb31c892e8ded034fdf45a4aa595b","permalink":"http://vcg.isti.cnr.it/author/Fabio-Ganovelli/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Fabio-Ganovelli/","section":"authors","summary":"Fabio Ganovelli is a Senior Researcher at the Visual Computing Laboratory of ISTI-CNR (Institute of Science and Technologies of Information - National Research Council) in Pisa, Italy.\nHe holds a Ph.","tags":null,"title":"Fabio Ganovelli","type":"authors"},{"authors":["alessandro-muntoni"],"categories":null,"content":"I am a Research Fellow of the Visual Computing Lab of ISTI-CNR in Pisa.\nMy research is focused on Computer Graphics, mainly on Digital Fabrication and Geometry Processing. I am currently mantaining several software developed in the VCLab. The main ones are MeshLab and PyMeshLab.\nBefore joining the VCLab, I was part of the CG3HCI group of the University of Cagliari, where I earned my BSc, MSc and Ph.D.\nPersonal Website\n","date":1640995200,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1640995200,"objectID":"bf315040d80f18ff26173daeb57f4b2d","permalink":"http://vcg.isti.cnr.it/author/Alessandro-Muntoni/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Alessandro-Muntoni/","section":"authors","summary":"I am a Research Fellow of the Visual Computing Lab of ISTI-CNR in Pisa.\nMy research is focused on Computer Graphics, mainly on Digital Fabrication and Geometry Processing. I am currently mantaining several software developed in the VCLab.","tags":null,"title":"Alessandro Muntoni","type":"authors"},{"authors":null,"categories":null,"content":"I am a permanent researcher at the Visual Computing Lab ISTI-CNR. I am a researcher in the digital technologies used for documenting, managing, and enhancing Cultural Heritage for conservation work and museum exhibitions. I specialised in studying the ancient colour on the marble surface and using 2D/3D Computer Graphic techniques for the knowledge and the virtual reconstruction of the ancient polychromy. I have multidisciplinary training and I am a pioneer in my field of research. I graduated with honours in Cultural Heritage Preservation (Old Settlement, Restoration Techniques matter), I was a lecturer in the field of Museology applied to Archaeology and I holds a PhD in Classical Archaeology at the University of Pisa. At the same time, I obtained a 2nd level Master degree in Geographic Information Systems, I specialised in 2D/3D Computer Graphic techniques and deepened my studies in the field of diagnostic surveys for Cultural Heritage.\n","date":1640995200,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1640995200,"objectID":"07417bd181a746d795aac48738ea5cd0","permalink":"http://vcg.isti.cnr.it/author/Eliana-Siotto/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Eliana-Siotto/","section":"authors","summary":"I am a permanent researcher at the Visual Computing Lab ISTI-CNR. I am a researcher in the digital technologies used for documenting, managing, and enhancing Cultural Heritage for conservation work and museum exhibitions.","tags":null,"title":"Eliana Siotto","type":"authors"},{"authors":null,"categories":null,"content":"","date":1640995200,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1640995200,"objectID":"77a225e7a74437f40459d8d4e9d4a975","permalink":"http://vcg.isti.cnr.it/author/Federico-Ponchio/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Federico-Ponchio/","section":"authors","summary":"","tags":null,"title":"Federico Ponchio","type":"authors"},{"authors":null,"categories":null,"content":"I am a permanent researcher at the Visual Computing Lab - ISTI CNR.\nMy reserach interests are the acquisition, processing, and analysis of 3D/2D data to improve their use and understanding. I am working on 3D scanning, acquisition and modelling of real object surface appearance, analysis and visualization of the temporal 3D data for automatic change detection, non-rigid registration of 3D raw acquired data, approximation of the global illumination effects for real time rendering, user interface for Virtual Reality, web visualization of 3D/2D data.\n","date":1640995200,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1640995200,"objectID":"1143a9534daf236ba927154fb493927d","permalink":"http://vcg.isti.cnr.it/author/Gianpaolo-Palma/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Gianpaolo-Palma/","section":"authors","summary":"I am a permanent researcher at the Visual Computing Lab - ISTI CNR.\nMy reserach interests are the acquisition, processing, and analysis of 3D/2D data to improve their use and understanding.","tags":null,"title":"Gianpaolo Palma","type":"authors"},{"authors":null,"categories":null,"content":"I am a Senior Researcher at the Visual Computing Lab of ISTI-CNR (institute of Science and Technologies of Information - National Research Council), in Pisa. I have a Ph.D. and a Master’s Degree in Computer Science.\nMy main research activity is focused on the use of digital technologies and in particular, 3D computer graphics, in the Cultural Heritage field. I am an expert in 3D scanning and digitization of real-world objects, especially Cultural Heritage artifacts. I have extensive expertise in data processing and 3D model creation. I have worked a lot on methods for the color capture and photographic mapping onto 3D models. Currently, I am working on the web-based visualization of 3D models. I am a developer of MeshLab, and the main architect of 3DHOP. I have coordinated and carried out various 3D scanning campaigns, both in Italy and abroad.\n","date":1640995200,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1640995200,"objectID":"380186b760e19cf5c92d731dcc515b13","permalink":"http://vcg.isti.cnr.it/author/Marco-Callieri/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Marco-Callieri/","section":"authors","summary":"I am a Senior Researcher at the Visual Computing Lab of ISTI-CNR (institute of Science and Technologies of Information - National Research Council), in Pisa. I have a Ph.D. and a Master’s Degree in Computer Science.","tags":null,"title":"Marco Callieri","type":"authors"},{"authors":null,"categories":null,"content":"Marco Potenziani is a Researcher at the Visual Computing Laboratory of ISTI-CNR (Institute of Science and Technologies of Information - National Research Council) in Pisa, Italy.\nHe holds a Ph.D. in computer science from the University of Pisa, and a Master’s Degree in Information Engineering from the University of Siena.\nHis research interests include several fields of Computer Graphics. Cultural Heritage and scientific visualisation are the main application fields for the technologies developed.\nEngaged in several national and international research projects, developer of the open-source tool 3D Heritage Online Presenter (3DHOP), Associate Editor of the ACM Journal on Computing and Cultural Heritage (JOCCH), CNR expert for the Italian Ministry of Economic Development (MiSE) projects evaluation, he taught a course on “3D Graphics for Cultural Heritage” at the University of Pisa, and served as a reviewer and IPC member for several scientific conferences and journals.\n","date":1640995200,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1640995200,"objectID":"285b6869c8e2383020071c752d79659a","permalink":"http://vcg.isti.cnr.it/author/Marco-Potenziani/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Marco-Potenziani/","section":"authors","summary":"Marco Potenziani is a Researcher at the Visual Computing Laboratory of ISTI-CNR (Institute of Science and Technologies of Information - National Research Council) in Pisa, Italy.\nHe holds a Ph.D. in computer science from the University of Pisa, and a Master’s Degree in Information Engineering from the University of Siena.","tags":null,"title":"Marco Potenziani","type":"authors"},{"authors":null,"categories":null,"content":"I am a permanent researcher at the Visual Computing Lab - ISTI CNR. My research interests are: 3D acquisition, processing and analysis of data, Cultural Heritage applications, interactive graphics, virtual reality, optical metrology techniques for the study and the conservation of Cultural Heritage\n","date":1640995200,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1640995200,"objectID":"076167febc016ba4532a24784ac9bfb9","permalink":"http://vcg.isti.cnr.it/author/Paolo-Pingi/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Paolo-Pingi/","section":"authors","summary":"I am a permanent researcher at the Visual Computing Lab - ISTI CNR. My research interests are: 3D acquisition, processing and analysis of data, Cultural Heritage applications, interactive graphics, virtual reality, optical metrology techniques for the study and the conservation of Cultural Heritage","tags":null,"title":"Paolo Pingi","type":"authors"},{"authors":null,"categories":null,"content":"I am Post-Doctoral Researcher at the ISTI - CNR in Pisa. My research investigates the interface between architecture, geometry, computational design, and digital fabrication. I pursued my PhD in the Applied Geometry Group at TU Wien, and I worked as post-doc in the Geometric Computing Lab at EPFL.\n","date":-62135596800,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":-62135596800,"objectID":"fa22852a810090391d3e7ade206a9d4c","permalink":"http://vcg.isti.cnr.it/author/Davide-Pellis/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Davide-Pellis/","section":"authors","summary":"I am Post-Doctoral Researcher at the ISTI - CNR in Pisa. My research investigates the interface between architecture, geometry, computational design, and digital fabrication. I pursued my PhD in the Applied Geometry Group at TU Wien, and I worked as post-doc in the Geometric Computing Lab at EPFL.","tags":null,"title":"Davide Pellis","type":"authors"},{"authors":null,"categories":null,"content":"I am a ………… ……. … ………… …. … ….. ……… …… …. ……….\n………… ……. … ………… …. … ….. ……… …… …. ………. ………… ……. … ………… …. … ….. ……… …… …. …………………. ……. … ………… …. … ….. ……… …… …. …………………. ……. … ………… …. … ….. ……… …… …. ………. ………… ……. … ………… …. … ….. ……… …… …. …………………. ……. … ………… …. … ….. ……… …… …. ………. ………… ……. … ………… …. … ….. ……… …… …. …………………. ……. … …… …… …. … ….. ……… …… …. …………………. ……. … ………… …. … ….. ……… …… …. ……….\n","date":-62135596800,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":-62135596800,"objectID":"23a972b6b781857ec80d3f700eaff7fa","permalink":"http://vcg.isti.cnr.it/author/Elena-Scandurra/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Elena-Scandurra/","section":"authors","summary":"I am a ………… ……. … ………… …. … ….. ……… …… …. ……….\n………… ……. … ………… …. … ….. ……… …… …. ………. ………… ……. … ………… …. … ….","tags":null,"title":"Elena Scandurra","type":"authors"},{"authors":null,"categories":null,"content":"I am a PhD student of the Visual Computing Lab of ISTI-CNR in Pisa.\nI graduated from the Master’s Degree program in Biomedical Engineering at the University of Pisa. During my master’s thesis, i dealt with the generation of artificial mammograms through Image-to-Image Translation techniques.\nMy main research activity is focused on the use of NeRFs in the biomedical field.\n","date":-62135596800,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":-62135596800,"objectID":"0fb034b5749de3f22bac6305cf9f0d8e","permalink":"http://vcg.isti.cnr.it/author/Valentina-Piras/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Valentina-Piras/","section":"authors","summary":"I am a PhD student of the Visual Computing Lab of ISTI-CNR in Pisa.\nI graduated from the Master’s Degree program in Biomedical Engineering at the University of Pisa. During my master’s thesis, i dealt with the generation of artificial mammograms through Image-to-Image Translation techniques.","tags":null,"title":"Valentina Piras","type":"authors"},{"authors":null,"categories":null,"content":"\nThe Visual Computing Lab is a research group of the CNR-ISTI (Italian National Research Council - Institute for Information Science and Technology) in Pisa, Italy. The lab is headed by Paolo Cignoni, and is located in the CNR-ISTI building in the CNR Research Area in Pisa, Italy.\n","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"3091162792d020de95c92f946d120cd4","permalink":"http://vcg.isti.cnr.it/home/welcome/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/home/welcome/","section":"home","summary":"The Visual Computing Lab is a research group of the CNR-ISTI (Italian National Research Council - Institute for Information Science and Technology) in Pisa, Italy. The lab is headed by Paolo Cignoni, and is located in the CNR-ISTI building in the CNR Research Area in Pisa, Italy.","tags":null,"title":"Visual Computing Laboratory\n","type":"home"},{"authors":[],"categories":null,"content":"Slides can be added in a few ways:\nCreate slides using Wowchemy’s Slides feature and link using slides parameter in the front matter of the talk file Upload an existing slide deck to static/ and link using url_slides parameter in the front matter of the talk file Embed your slides (e.g. Google Slides) or presentation video on this page using shortcodes. Further event details, including page elements such as image galleries, can be added to the body of this page.\n","date":1906549200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1906549200,"objectID":"a8edef490afe42206247b6ac05657af0","permalink":"http://vcg.isti.cnr.it/event/example/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/event/example/","section":"event","summary":"An example event.","tags":[],"title":"Example Event","type":"event"},{"authors":["Andrea Favilli","Francesco Laccone","Paolo Cignoni","Luigi Malomo","Daniela Giorgi"],"categories":null,"content":"","date":1706745600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1706745600,"objectID":"2e3e1c5b51a036b7d07c01f5ad8b4106","permalink":"http://vcg.isti.cnr.it/publication/2024/FLCMG24-GeometricLearningxShells/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2024/FLCMG24-GeometricLearningxShells/","section":"publication","summary":"This paper introduces a novel method for shape optimization and form-finding of free-form, triangular grid shells, based on geometric deep learning. We define an architecture which consumes a 3D mesh representing the initial design of a free-form grid shell, and outputs vertex displacements to get an optimized grid shell that minimizes structural compliance, while preserving design intent. The main ingredients of the architecture are layers that produce deep vertex embeddings from geometric input features, and a differentiable loss implementing structural analysis. We evaluate the method performance on a benchmark of eighteen free-form grid shell structures characterized by various size, geometry, and tessellation. Our results demonstrate that our approach can solve the shape optimization and form finding problem for a diverse range of structures, more effectively and efficiently than existing common tools.","tags":["Architectural Geometry","Grid Shells","Shape Optimization","Form Finding","evocation","Sun"],"title":"Geometric deep learning for statics-aware grid shells","type":"publication"},{"authors":["Arslan Siddique","Francesco Banterle","Massimiliano Corsini","Paolo Cignoni","Daniel Sommerville","Chris Joffe"],"categories":null,"content":"The source code for MoReLab can be found on our Github repository.\n","date":1689552e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1689552e3,"objectID":"075599ad243ea8102ce696acc88e30a0","permalink":"http://vcg.isti.cnr.it/publication/2023/SBC23-MoReLab/","publishdate":"2023-07-17T00:00:00Z","relpermalink":"/publication/2023/SBC23-MoReLab/","section":"publication","summary":"A software for user-assisted 3D reconstruction.","tags":["Source Themes"],"title":"MoReLab: A Software for User-Assisted 3D Reconstruction","type":"publication"},{"authors":["Andrea Maggiordomo","Paolo Cignoni","Marco Tarini"],"categories":null,"content":"","date":1677542400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1677542400,"objectID":"ab7b9d65e573903605051afa2efef60c","permalink":"http://vcg.isti.cnr.it/publication/2023/MCT23-TextureInpainting/","publishdate":"2023-02-28T00:00:00Z","relpermalink":"/publication/2023/MCT23-TextureInpainting/","section":"publication","summary":"We devise a technique designed to remove the texturing artefacts that are typical of 3D models representing real-world objects, acquired by photogrammetric techniques. Our technique leverages the recent advancements in inpainting of natural colour images, adapting them to the specific context. A neural network, modified and trained for our purposes, replaces the texture areas containing the defects, substituting them with new plausible patches of texels, reconstructed from the surrounding surface texture. We train and apply the network model on locally reparametrized texture patches, so to provide an input that simplifies the learning process, because it avoids any texture seams, unused texture areas, background, depth jumps and so on. We automatically extract appropriate training data from real-world datasets. We show two applications of the resulting method: one, as a fully automatic tool, addressing all problems that can be detected by analysing the UV-map of the input model; and another, as an interactive semi-automatic tool, presented to the user as a 3D ‘fixing’ brush that has the effect of removing artefacts from any zone the users paints on. We demonstrate our method on a variety of real-world inputs and provide a reference usable implementation. ","tags":null,"title":"Texture Inpainting for Photogrammetric Models","type":"publication"},{"authors":[],"categories":[],"content":"","date":1674207548,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1674207548,"objectID":"5f856bad9a0438ade5ae7cef7421f2a6","permalink":"http://vcg.isti.cnr.it/project/evocation/","publishdate":"2023-01-20T10:39:08+01:00","relpermalink":"/project/evocation/","section":"project","summary":"","tags":[],"title":"Evocation","type":"project"},{"authors":[],"categories":[],"content":"","date":1674207548,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1674207548,"objectID":"c9a08ffe9af217e3c97802bcf89ec488","permalink":"http://vcg.isti.cnr.it/project/sun/","publishdate":"2023-01-20T10:39:08+01:00","relpermalink":"/project/sun/","section":"project","summary":"","tags":[],"title":"SUN-XR","type":"project"},{"authors":["Somnath Dutta","Fabio Ganovelli","Paolo Cignoni"],"categories":null,"content":"","date":1672531200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1672531200,"objectID":"a33157f0a154583c7cc9c0724df7185a","permalink":"http://vcg.isti.cnr.it/publication/2023/DGC23-NausicaaSystem/","publishdate":"2023-01-01T00:00:00Z","relpermalink":"/publication/2023/DGC23-NausicaaSystem/","section":"publication","summary":"","tags":null,"title":"On-the-fly Acquisition and Rendering with Low Cost Lidar and RGB Cameras for Marine Navigation","type":"publication"},{"authors":null,"categories":null,"content":"","date":1666569600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1666569600,"objectID":"6d99026b9e19e4fa43d5aadf147c7176","permalink":"http://vcg.isti.cnr.it/contact/","publishdate":"2022-10-24T00:00:00Z","relpermalink":"/contact/","section":"","summary":"","tags":null,"title":"Contact","type":"landing"},{"authors":null,"categories":null,"content":"","date":1666569600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1666569600,"objectID":"b0d61e5cbb7472bf320bf0ef2aaeb977","permalink":"http://vcg.isti.cnr.it/tour/","publishdate":"2022-10-24T00:00:00Z","relpermalink":"/tour/","section":"","summary":"","tags":null,"title":"Tour","type":"landing"},{"authors":["Marco Cococcioni","Marco Grazzi","Le Li","Federico Ponchio"],"categories":null,"content":"","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"504ed7a538fcffdeca3a15ea11638a9d","permalink":"http://vcg.isti.cnr.it/publication/2022/CGLP22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/CGLP22/","section":"publication","summary":"","tags":null,"title":"A toolbox for measuring heterogeneity and efficiency using zonotopes","type":"publication"},{"authors":["Iason Manolas","Francesco Laccone","Gianmarco Cherchi","Luigi Malomo","Paolo Cignoni"],"categories":null,"content":" ","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"c248191c67584e5ae96b2fc3b6650696","permalink":"http://vcg.isti.cnr.it/publication/2022/MLCMC22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/MLCMC22/","section":"publication","summary":"The computational fabrication community is developing an increasing interest in the use of patterned surfaces, which can be designed to show ornamental and unconventional aesthetics or to perform as a proper structural material with a wide range of features. Geometrically designing and controlling the deformation capabilities of these patterns in response to external stimuli is a complex task due to the large number of variables involved. This paper introduces a method for generating sets of tileable and exchangeable flat patterns as well as a model-reduction strategy that enables their mechanical simulation at interactive rates. This method is included in a design pipeline that aims to turn any general flat surface into a pattern tessellation, which is able to deform under a given loading scenario. To validate our approach, we apply it to different contexts, including real-scale 3D printed specimens, for which we compare our results with the ones provided by a ground-truth solver.","tags":null,"title":"Automated generation of flat tileable patterns and 3D reduced model simulation","type":"publication"},{"authors":["Marco Potenziani","Federico Ponchio","Marco Callieri","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"fdc063acfcc502b85359d9b6d2be20c1","permalink":"http://vcg.isti.cnr.it/publication/2022/PPCCS22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/PPCCS22/","section":"publication","summary":"","tags":null,"title":"Cultural Heritage 3D Data on the Web: Issues and Perspectives","type":"publication"},{"authors":["Francesco Laccone","Luigi Malomo","Marco Callieri","Thomas Alderighi","Alessandro Muntoni","Federico Ponchio","Nico Pietroni","Paolo Cignoni"],"categories":null,"content":" ","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"1f8c7401551020e40b825b2eeed3058f","permalink":"http://vcg.isti.cnr.it/publication/2022/LMCAMPPC22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/LMCAMPPC22/","section":"publication","summary":"Mesostructured patterns are a modern and efficient concept based on designing the geometry of structural material at the meso-scale to achieve desired mechanical performances. In the context of bending-active structures, such a concept can be used to control the flexibility of the panels forming a surface without changing the constituting material. These panels undergo a formation process of deformation by bending, and application of internal restraints. This paper describes a new constructional system, FlexMaps, that has initiated the adoption of bending-active mesostructures at the architectural scale. Here, these modules are in the form of four-arms spirals made of CNC-milled plywood and are designed to reach the desired target shape once assembled. All phases from the conceptual design to the fabrication are seamlessly linked within an automated workflow. To illustrate the potential of the system, the paper discusses the results of a demonstrator project entitled FlexMaps Pavilion (3.90x3.96x3.25 meters) that has been exhibited at the IASS Symposium in 2019 and more recently at the 2021 17th International Architecture Exhibition, La Biennale di Venezia. The structural response is investigated through a detailed structural analysis, and the long-term behavior is assessed through a photogrammetric survey. For more details on the prototype, please visit this webpage Our pavilion has been exhibited in the Italian pavilion of the 2021 17th Biennale Architettura in Venice","tags":null,"title":"Design and construction of a bending-active plywood structure: the Flexmaps Pavilion","type":"publication"},{"authors":["Antonella Camarda","Marco Callieri","Fabio Bettio","Giuliana Altea","Moonisa Ahsan","Paolo Cignoni","Enrico Gobbetti","Paolo Ledda","Alessandro Lutzu","Fabio Marton","Giuseppe Mignemi","Federico Ponchio"],"categories":null,"content":" ","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"ce93289e11350a09f3720b49ae74a618","permalink":"http://vcg.isti.cnr.it/publication/2022/AABCCCGLLMMP22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/AABCCCGLLMMP22/","section":"publication","summary":" ","tags":null,"title":"Ebb \u0026 Flow: Uncovering Costantino Nivola s Olivetti Sandcast through 3D Fabrication and Virtual Exploration","type":"publication"},{"authors":["Francesco Laccone","Iason Manolas","Luigi Malomo","Paolo Cignoni"],"categories":null,"content":" ","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"73170c68a1d26f4e0d0c36d014761bae","permalink":"http://vcg.isti.cnr.it/publication/2022/LMMC22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/LMMC22/","section":"publication","summary":"Recycled HDPE plastic can be obtained from up to 100% waste material and can be produced in the shape of panels and rods. The aim of this work is to explore the possibility to employ this material for structural purposes. The proposed concept for segmented shells is based on the cassette system, namely a spatial waffle structure clamped by inner and outer plates, and a shaping strategy of the shell cross section targeted on bending. The concept is applied on translational surfaces, in which the transverse cross section serves as the shaping objective. A digital workflow is implemented to explore the possible solutions and to evaluate the shells' feasibility from both a fabrication and a structural point of view. A case study of 5.2 meters is further explored with nonlinear analysis.","tags":null,"title":"Exploratory study on a segmented shell made of recycled-HDPE plastic","type":"publication"},{"authors":["Costanza Cucci","Marco Potenziani","Fauzia Albertin","Chiara Ruberto","Marcello Picollo","Lorenzo Stefani","Marco Callieri","Eliana Siotto","Paolo Pingi","Roberto Scopigno","Lisa Castelli","Francesco Taccetti","Matteo Bettuzzi","Rosa Brancaccio","Maria Pia Morigi","Francesca De Vita"],"categories":null,"content":"","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"c408089a2232072f7dd91eecd8545caf","permalink":"http://vcg.isti.cnr.it/publication/2022/CPARPSCSPSCTBBMD22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/CPARPSCSPSCTBBMD22/","section":"publication","summary":"","tags":null,"title":"Leafing through the painting “Ecce Homo” by Antonello da Messina: multimodal imaging techniques and data-fusion","type":"publication"},{"authors":["Gaia Pavoni","Francesca Giuliani","Anna De Falco","Massimiliano Corsini","Federico Ponchio","Marco Callieri","Paolo Cignoni"],"categories":null,"content":" ","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"0d372162b53fbd23e64e69a1a73cc741","permalink":"http://vcg.isti.cnr.it/publication/2022/PGDCPCC22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/PGDCPCC22/","section":"publication","summary":" ","tags":null,"title":"On assisting and automatizing the semantic segmentation of masonry walls","type":"publication"},{"authors":["Stefano Nuvoli","Nico Pietroni","Paolo Cignoni","Riccardo Scateni","Marco Tarini"],"categories":null,"content":" https://doi.org/10.1145/3550454.3555503 ","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"2d6c5574683bd4636b59b69a816edc0c","permalink":"http://vcg.isti.cnr.it/publication/2022/NPCST22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/NPCST22/","section":"publication","summary":"We propose a novel technique to compose new 3D animated models, such as videogame characters, by combining pieces from existing ones. Our method works on production-ready rigged, skinned, and animated 3D models to reassemble new ones. We exploit mix-and-match operations on the skeletons to trigger the automatic creation of a new mesh, linked to the new skeleton by a set of skinning weights and complete with a set of animations. The resulting model preserves the quality of the input meshings (which can be quad-dominant and semi-regular), skinning weights (inducing believable deformation), and animations, featuring coherent movements of the new skeleton. Our method enables content creators to reuse valuable, carefully designed assets by assembling new ready-to-use characters while preserving most of the hand-crafted subtleties of models authored by digital artists. As shown in the accompanying video, it allows for drastically cutting the time needed to obtain the final result. https://doi.org/10.1145/3550454.3555503","tags":null,"title":"SkinMixer: Blending 3D Animated Models","type":"publication"},{"authors":["Thomas Alderighi","Luigi Malomo","Thomas Auzinger","Bernd Bickel","Paolo Cignoni","Nico Pietroni"],"categories":null,"content":"","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"746bd23d5de6925229da739a06bb7c9b","permalink":"http://vcg.isti.cnr.it/publication/2022/AMABCP22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/AMABCP22/","section":"publication","summary":"Moulding refers to a set of manufacturing techniques in which a mould, usually a cavity or a solid frame, is used to shape a liquid or pliable material into an object of the desired shape. The popularity of moulding comes from its effectiveness, scalability and versatility in terms of employed materials. Its relevance as a fabrication process is demonstrated by the extensive literature covering different aspects related to mould design, from material flow simulation to the automation of mould geometry design. In this state-of-the-art report, we provide an extensive review of the automatic methods for the design of moulds, focusing on contributions from a geometric perspective. We classify existing mould design methods based on their computational approach and the nature of their target moulding process. We summarize the relationships between computational approaches and moulding techniques, highlighting their strengths and limitations. Finally, we discuss potential future research directions. The published version is available at the following link https://doi.org/10.1111/cgf.14581","tags":null,"title":"State of the Art in Computational Mould Design","type":"publication"},{"authors":["Gianpaolo Palma","Paolo Pingi","Eliana Siotto"],"categories":null,"content":"","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"28714cb61cdd648dcd53c099ef19a83b","permalink":"http://vcg.isti.cnr.it/publication/2022/PPS22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/PPS22/","section":"publication","summary":"","tags":null,"title":"Temporal Deformation Analysis of 3D Models as Diagnostic Tool for Panel Paintings","type":"publication"},{"authors":["Paolo Pingi","Eliana Siotto"],"categories":null,"content":"","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"c45fad7d44757ec837b44c0e28dfc0b7","permalink":"http://vcg.isti.cnr.it/publication/2022/PS22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/PS22/","section":"publication","summary":"","tags":null,"title":"Un modello 3D per lo studio ed il monitoraggio","type":"publication"},{"authors":["Maurizio Froli","Paolo Cignoni","Luigi Malomo","Domenico Gaudioso","Francesco Laccone"],"categories":null,"content":"","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"68744ff00ac71764b3bdc88c11c98d6d","permalink":"http://vcg.isti.cnr.it/publication/2022/LGMCF22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/LGMCF22/","section":"publication","summary":"In the context of tall building design, the tube concept represents one of the most performing systems. The diagrid is the widespread type of tube system and consists of a diagonal grid of beams that wraps the building, forming a diamond pattern. It performs as lateral bracing and is additionally able to sustain vertical loading through axial forces. Despite its efficiency, a growing interest is recently observed in alternative geometries to replace the diagrid pattern and improve the architectural impact conferred by the building skin aesthetics on the urban environment. The paper pursues the use of a Voronoi mesh, in which the geometry of the cells is steered to known schemes for the structural design of a cantilever tube structure. The objective is to mimic a macroscopic structural behavior through a topology and size modification of the Voronoi mesh that increases the density for creating resisting paths with higher stiffness. The paper proposes a novel method Vorogrid for designing a new class of tall buildings equipped with an organic-looking and mechanically-sound tube structure, which makes them a valuable alternative to competitors (diagrid, hexagrid, random Voronoi). Diagrids and hexagrids still remain more efficient in terms of forces and displacements but are characterized by a more usual appearance, instead Vorogrid offers more design control and better performances on average with respect to random Voronoi structures. This method is streamed into a pipeline that includes grid initialization strategies, geometric and structural optimization to mitigate the effects of the grid randomness, and structural sizing.","tags":["Architectural Geometry","Structural Optimization"],"title":"Vorogrid: A static-aware variable-density Voronoi mesh to design the tube structure tessellation of tall buildings","type":"publication"},{"authors":null,"categories":null,"content":"Eurographics conferred to VC Lab Head Paolo Cignoni the 2021 Outstanding Technical Contributions Award for his extraordinary technical contribution to 3D graphics!\n","date":1618963200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1618963200,"objectID":"deaef6e335076fa513ab29d79c122fd5","permalink":"http://vcg.isti.cnr.it/post/21-04-21-paolo-cignoni-award/","publishdate":"2021-04-21T00:00:00Z","relpermalink":"/post/21-04-21-paolo-cignoni-award/","section":"post","summary":"Eurographics conferred to VC Lab Head Paolo Cignoni the 2021 Outstanding Technical Contributions Award for his extraordinary technical contribution to 3D graphics!","tags":null,"title":"Paolo Cignoni: Outstanding Technical Contributions Award","type":"post"},{"authors":["Fauzia Albertin","Chiara Ruberto","Costanza Cucci","Marco Callieri","Marco Potenziani","Eliana Siotto","Paolo Pingi","Roberto Scopigno","Matteo Bettuzzi","Rosa Brancaccio","Maria Pia Morigi","Lisa Castelli","Francesco Taccetti","Marcello Picollo","Lorenzo Stefani","Francesca De Vita"],"categories":null,"content":" ","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"ad47a6a7e4a4602b7074cc7bc86942ec","permalink":"http://vcg.isti.cnr.it/publication/2021/ARCCPSPSBBMCTPSD21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/ARCCPSPSBBMCTPSD21/","section":"publication","summary":"Scientific investigations of artworks are crucial in terms of preservation since they provide a measurable evaluation of the materials and the state of conservation. This is the case of Antonello da Messina's painting 'Ecce Homo': its delicate state of conservation, with the need for constant monitoring, required a broad and in-depth diagnostic campaign to support the restorers. The project was carried out entirely in situ using non-invasive cutting-edge techniques and proposes a multimodal and data-centric approach, integrating 3D and 2D methodologies. The surface irregularities and the support were analysed with a structured-light 3D scanner and X-ray tomography. The painting materials were investigated with X-ray fluorescence scanning (MA-XRF) and reflectance hyperspectral imaging (HSI). Primarily, the data were jointly used for a scientific scope and provided new knowledge of the painting in terms of materials and painting techniques. In addition, two web-based interactive platforms were developed: one to provide restorers and experts with a new perspective of the hidden geometries of the painting, and the other targeted at the general public for dissemination purposes. The results of the Ecce Homo scientific analysis were exhibited, using a touch-screen interface, and developed for different user levels, from adults to kids.","tags":null,"title":"“Ecce Homo” by Antonello da Messina, from non-invasive investigations to data fusion and dissemination","type":"publication"},{"authors":["Daniele Fornari","Luigi Malomo","Paolo Cignoni"],"categories":null,"content":" ","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"1c3e988b40c17c6166c87c5f58eaed02","permalink":"http://vcg.isti.cnr.it/publication/2021/FMC21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/FMC21/","section":"publication","summary":"The interaction between a 2D input device (like a mouse or a touchscreen) and a 3D object on the screen with the purpose of examining it in detail is a well-studied interaction problem. The inherent difference in degrees of freedom between input devices and possible 3D transformations makes it difficult to intuitively map inputs to operations to be performed on 3D objects. Although, over the years, studies led to a wide variety of solutions to overcome this problem, most of them are not actually available in real-world applications. In particular, for 3D web applications, only basic solutions are often implemented, and even the most used web framework for 3D still lacks state of the art implementations. We will face the problem of 3D interaction through touch and mouse input, and we propose our implementation of a 3D view manipulator for web applications, which offers a natural control, advanced functionalities, and provides an easy-to-use interface for both desktop and mobile environments.","tags":null,"title":"A High Quality 3D Controller for Mobile and Desktop Web Applications","type":"publication"},{"authors":["Gianpaolo Palma","Sara Perry","Paolo Cignoni"],"categories":null,"content":" ","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"f4cf8609beba0771597bf108b2beb8bb","permalink":"http://vcg.isti.cnr.it/publication/2021/PPC21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/PPC21/","section":"publication","summary":"Virtual reality (VR) technologies have become more and more affordable and popular in the last five years thanks to hardware and software advancements. A critical issue for these technologies is finding paradigms that allow user interactions in ways that are as similar as possible to the real world, bringing physicality into the experience. Current literature has shown, with different experiments, that the mapping of real objects in virtual reality alongside haptic feedback significantly increases the realism of the experience and user engagement, leading to augmented virtuality. In this paper, we present a system to improve engagement in a VR experience using inexpensive, physical, and sensorized copies of real artefacts made with cheap 3D fabrication technologies. Based on a combination of hardware and software components, the proposed system gives the user the possibility to interact with the physical replica in the virtual environment and to see the appearance of the original cultural heritage artefact. In this way, we overcome one of the main limitations of mainstream 3D fabrication technologies: a faithful appearance reproduction. Using a consumer device for the real-time hand tracking and a custom electronic controller for the capacitive touch sensing, the system permits the creation of augmented experiences where the user with their hands can change the virtual appearance of the real replica object using a set of personalization actions selectable from a physical 3D-printed palette.","tags":null,"title":"Augmented Virtuality Using Touch-Sensitive 3D-Printed Objects","type":"publication"},{"authors":["Stefano Nuvoli","Alessandro Tola","Alessandro Muntoni","Nico Pietroni","Enrico Gobbetti","Riccardo Scateni"],"categories":null,"content":"","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"78ce8e9a852c0cb419f01ee3c503fb8e","permalink":"http://vcg.isti.cnr.it/publication/2021/NTMPGS21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/NTMPGS21/","section":"publication","summary":"","tags":null,"title":"Automatic surface segmentation for seamless fabrication using 4-axis milling machines","type":"publication"},{"authors":["Gaia Pavoni","Massimiliano Corsini","Nicole Pedersen","Vid Petrovic","Paolo Cignoni"],"categories":null,"content":" ","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"c49940461af31a07403751f61dd15347","permalink":"http://vcg.isti.cnr.it/publication/2021/PCPPC21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/PCPPC21/","section":"publication","summary":" ","tags":null,"title":"Challenges in the deep learning-based semantic segmentation of benthic communities from Ortho-images","type":"publication"},{"authors":["Thomas Alderighi","Daniela Giorgi","Luigi Malomo","Paolo Cignoni","Monica Zoppè"],"categories":null,"content":" ","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"4603ec0c657b5fc46bc067b788d7c9d5","permalink":"http://vcg.isti.cnr.it/publication/2021/AGMCZ21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/AGMCZ21/","section":"publication","summary":"Tangible 3D molecular models conceptualize complex phenomena in a stimulating and engaging format. This is especially true for learning environments, where additive manufacturing is increasingly used to produce teaching aids for chemical education. However, the 3D models presented previously are limited in the type of molecules they can represent and the amount of information they carry. In addition, they have little role in representing complex biological entities such as proteins. We present the first complete workflow for the fabrication of soft models of complex proteins of any size. We leverage on molding technologies to generate accurate, soft models which incorporate both spatial and functional aspects of large molecules. Our method covers the whole pipeline from molecular surface preparation and editing to actual 3D model fabrication. The models fabricated with our strategy can be used as aids to illustrate biological functional behavior, such as assembly in quaternary structure and docking mechanisms, which are difficult to convey with traditional visualization methods. We applied the proposed framework to fabricate a set of 3D protein models, and we validated the appeal of our approach in a classroom setting.","tags":null,"title":"Computational design, fabrication and evaluation of rubber protein models","type":"publication"},{"authors":["Paolo Pingi","Eliana Siotto","Gianpaolo Palma","Roberto Scopigno"],"categories":null,"content":"","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"231811c62adbdcac80e83c40045791bc","permalink":"http://vcg.isti.cnr.it/publication/2021/PSPS21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/PSPS21/","section":"publication","summary":"","tags":null,"title":"Documentation and analysis of the deformations of the panel and painted surface with 3D scanning","type":"publication"},{"authors":["Fredrik Ekengren","Marco Callieri","Domenica Dininno","Åsa Berggren","Stella Macheridis","Nicolo Dell Unto"],"categories":null,"content":" ","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"4b69f542d26a06da037ab75fdd5cea70","permalink":"http://vcg.isti.cnr.it/publication/2021/ECDBMD21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/ECDBMD21/","section":"publication","summary":" ","tags":null,"title":"Dynamic Collections: A 3D Web Infrastructure for Artifact Engagement","type":"publication"},{"authors":["Arslan Siddique","Massimiliano Corsini","Fabio Ganovelli","Paolo Cignoni"],"categories":null,"content":"","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"a9a24c14a2f5889f0637114441c25b92","permalink":"http://vcg.isti.cnr.it/publication/2021/SCGC21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/SCGC21/","section":"publication","summary":"","tags":null,"title":"Evaluating Deep Learning Methods for Low Resolution Point Cloud Registration in Outdoor Scenarios","type":"publication"},{"authors":["Linda Giresini","Mario Lucio Puppio","Francesco Laccone","Maurizio Froli"],"categories":null,"content":"https://doi.org/10.1080/13632469.2021.1964646\n","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"13bc6a2bd4669b81a6e0a0a61a0f38f8","permalink":"http://vcg.isti.cnr.it/publication/2021/GPLF21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/GPLF21/","section":"publication","summary":"This paper illustrates the results of an experimental campaign performed on a scale prototype of a base dissipator called Mini Tribological ROCKing Seismic Isolation Device. This device allows a smooth, controlled and damped rocking by means of frictional layers and viscous elastic springs, which aim at decoupling the frequencies of the superstructure, at dissipating energy during motion and at re-centering the system once the external action vanishes. Four superstructures are tested a shear type frame, braced and unbraced, a multi-story frame and a SDOF oscillator with 96 ambient vibration and impulsive tests. An analytical model is illustrated and validated by the experimental tests. The reduction of relative displacement demand is analyzed for all the cases together with the reduction of the acceleration demand, showing positive effects of the base dissipator on the dynamic behavior of all the superstructures. https://doi.org/10.1080/13632469.2021.1964646","tags":null,"title":"Experimental and numerical investigation on a passive control system for the mitigation of vibrations on SDOF and MDOF Structures: mini Tribological ROCKing Seismic Isolation Device (miniTROCKSISD)","type":"publication"},{"authors":["Francesco Laccone","Luigi Malomo","Nico Pietroni","Paolo Cignoni","Tim Schork"],"categories":null,"content":" webpage\nhttps://doi.org/10.1016/j.istruc.2021.08.004\n","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"74d53bfda3a763770622f9a1011f6baa","permalink":"http://vcg.isti.cnr.it/publication/2021/LMPCS21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/LMPCS21/","section":"publication","summary":"This paper introduces an integrated computational design framework for the design and realization of arbitrarily-curved bending-active architectural structures.The developed framework consists of a series of methods that enable the production of a complex 3D structures composed of a set of flat 2D panels whose mechanical properties are locally tuned by varying the shape of embedded spiraling patterns. The resulting panels perform as variable stiffness elements, and they are optimized to match a desired target shape once assembled together. The presented framework includes all the steps for the physical delivery of architectural objects, including conception, static assessment, and digital fabrication. The developed framework has been applied to an architectural scale prototype, which demonstrates the potential of integrating architectural design, computational simulation, structural engineering, and digital fabrication, opening up several possible novel applications in the building sector. For more details on the prototype, please visit this webpage https://doi.org/10.1016/j.istruc.2021.08.004","tags":null,"title":"Integrated computational framework for the design and fabrication of bending-active structures made from flat sheet material","type":"publication"},{"authors":["Carlo Pavone","Alberto Abrate","Silvia Altomare","Marco Vella","Vincenzo Serretta","Alchiede Simonato","Marco Callieri"],"categories":null,"content":"","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"7019d6f1abf208d0b109046872029feb","permalink":"http://vcg.isti.cnr.it/publication/2021/PAAVSSC21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/PAAVSSC21/","section":"publication","summary":"","tags":null,"title":"Is Kelami`s Method Still Useful in the Smartphone Era? The Virtual 3-Dimensional Reconstruction of Penile Curvature in Patients With Peyronie`s Disease: A Pilot Study","type":"publication"},{"authors":["Roberto Scopigno"],"categories":null,"content":"","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"1fc91dc155dfcd036fc6e118f7eb0a31","permalink":"http://vcg.isti.cnr.it/publication/2021/Sco21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/Sco21/","section":"publication","summary":"","tags":null,"title":"Mixing Visual Media for Cultural Heritage","type":"publication"},{"authors":["Francesco Laccone","Alberto Casali","Marco Sodano","Maurizio Froli"],"categories":null,"content":" https://doi.org/10.1002/tal.1839\n","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"843e330020ff415eb2327531c511ecfd","permalink":"http://vcg.isti.cnr.it/publication/2021/LCSF21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/LCSF21/","section":"publication","summary":"Skyscrapers are among the most distinctive building types of the modern age. Since many resources are attributed to these buildings, their design should consider a proper performance-based construction economy and environmental sustainable development. This research introduces a new concept for a bundled tall building founded on the use of a multi-core-outrigger system, which is additionally enriched with diagrid structures. The concept is inspired by the bamboo plant and follows the biomimetic design principles for the structural organization and performance-based criteria for optimizing the lateral stiffness and for shaping the cross section. Particularly, the incident wind speed is maximized to exploit Vertical Axis Wind Turbines (VAWTs), which are located along the whole building height at the center of the bundled towers. The building morphogenesis is accomplished by a multistep methodology that is fully developed in a parametric environment and includes structural and computational fluid dynamic analyses. With the aim of validating the proposed concept, a case study of a 320-m-tall three-core building has been designed for the city of Pisa, Italy. The use of VAWTs results in an annual emissions reduction of about 10 kgCO_2/m^2. https://doi.org/10.1002/tal.1839","tags":null,"title":"Morphogenesis of a bundled tall building: Biomimetic, structural, and wind-energy design of a multi-core-outrigger system combined with diagrid","type":"publication"},{"authors":["Federico Landi","Marcella Cornia","Lorenzo Baraldi","Massimiliano Corsini","Rita Cucchiara"],"categories":null,"content":"","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"666757699d5185d123a2de2e387da1f1","permalink":"http://vcg.isti.cnr.it/publication/2021/LCBCC21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/LCBCC21/","section":"publication","summary":"","tags":null,"title":"Multimodal attention networks for low-level vision-and-language navigation","type":"publication"},{"authors":["Nico Pietroni","Stefano Nuvoli","Thomas Alderighi","Paolo Cignoni","Marco Tarini"],"categories":null,"content":" 10.1145/3450626.3459941\nwww.quadmesh.cloud\nDownload the slides! (.pttx)\n","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"a6773799208e6768ea19a06d4b02d217","permalink":"http://vcg.isti.cnr.it/publication/2021/PNACT21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/PNACT21/","section":"publication","summary":"We present a new algorithm for the semi-regular quadrangulation of an input surface, driven by its line features, such as sharp creases. We define a perfectly feature-aligned cross-field and a coarse layout of polygonal-shaped patches where we strictly ensure that all the feature-lines are represented as patch boundaries. To be able to consistently do so, we allow non-quadrilateral patches and T-junctions in the layout; the key is the ability to constrain the layout so that it still admits a globally consistent, T-junction-free, and pure-quad internal tessellation of its patches. This requires the insertion of additional irregular-vertices inside patches, but the regularity of the final-mesh is safeguarded by optimizing for both their number and for their reciprocal alignment. In total, our method guarantees the reproduction of feature-lines by construction, while still producing good quality, isometric, pure-quad, conforming meshes, making it an ideal candidate for CAD models. Moreover, the method is fully automatic, requiring no user intervention, and remarkably reliable, requiring little assumptions on the input mesh, as we demonstrate by batch processing the entire Thingi10K repository, with less than 0.5% of the attempted cases failing to produce a usable mesh.. DOI: 10.1145/3450626.3459941 Browsable dataset of Thingi10K remeshed objects: www.quadmesh.cloud Download the slides! (.pttx)","tags":null,"title":"Reliable feature-line driven quad-remeshing","type":"publication"},{"authors":["Paola Derudas","Nicolo Dell Unto","Marco Callieri","Jan Apel"],"categories":null,"content":" ","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"a63aaeaac00b3066e40cfbd139166875","permalink":"http://vcg.isti.cnr.it/publication/2021/DDCA21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/DDCA21/","section":"publication","summary":" ","tags":null,"title":"Sharing Archaeological Knowledge: The Interactive Reporting System","type":"publication"},{"authors":["Gaia Pavoni","Massimiliano Corsini","Federico Ponchio","Clinton Edwards","Nicole Pedersen","Stuart Sandin","Paolo Cignoni"],"categories":null,"content":"","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"b068acdd79e4ef44aa3afcc2de06da2c","permalink":"http://vcg.isti.cnr.it/publication/2021/PCPEPSC21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/PCPEPSC21/","section":"publication","summary":"","tags":null,"title":"TagLab: AI-assisted annotation for the fast and accurate semantic segmentation of coral reef orthoimages","type":"publication"},{"authors":["Andrea Maggiordomo","Paolo Cignoni","Marco Tarini"],"categories":null,"content":" https://doi.org/10.1111/cgf.142615\nhttps://github.com/maggio-a/texture-defrag\n","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"a6164c39e8b266d4ae49bc9a957315ac","permalink":"http://vcg.isti.cnr.it/publication/2021/MCT21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/MCT21/","section":"publication","summary":"We propose a method to improve an existing parametrization (UV-map layout) of a textured 3D model, targeted explicitly at alleviating typical defects afflicting models generated with automatic photo-reconstruction tools from real-world objects. This class of 3D data is becoming increasingly important thanks to the growing popularity of reliable, ready-to-use photogrammetry software packages. The resulting textured models are richly detailed, but their underlying parametrization typically falls short of many practical requirements, particularly exhibiting excessive fragmentation and consequent problems. Producing a completely new UV-map, with standard parametrization techniques, and then resampling a new texture image, is often neither practical nor desirable for at least two reasons: first, these models have characteristics (such as inconsistencies, high resolution) that make them unfit for automatic or manual parametrization; second, the required resampling leads to unnecessary signal degradation because this process is unaware of the original texel densities. In contrast, our method improves the existing UV-map instead of replacing it, balancing the reduction of the map fragmentation with signal degradation due to resampling, while also avoiding oversampling of the original signal. The proposed approach is fully automatic and extensively tested on a large benchmark of photo-reconstructed models; quantitative evaluation evidences a drastic and consistent improvement of the mappings. https://doi.org/10.1111/cgf.142615 Reference implementation available at https://github.com/maggio-a/texture-defrag","tags":null,"title":"Texture Defragmentation for Photo-Reconstructed 3D Models","type":"publication"},{"authors":["Roberto Scopigno","Federico Ponchio","Matteo Dellepiane","Marco Callieri","Francesco Banterle","Marco Potenziani"],"categories":null,"content":"","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"84cdd7b9319669362fad10d88e8663ce","permalink":"http://vcg.isti.cnr.it/publication/2021/PBCDPS21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/PBCDPS21/","section":"publication","summary":"","tags":null,"title":"Virtual clones for cultural heritage applications","type":"publication"},{"authors":["Thomas Alderighi","Luigi Malomo","Bernd Bickel","Paolo Cignoni","Nico Pietroni"],"categories":null,"content":" Presentation slides (.pptx)\n","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"c5fa0948345cb89a5442b921ca0ef184","permalink":"http://vcg.isti.cnr.it/publication/2021/AMBCP21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/AMBCP21/","section":"publication","summary":"We introduce a novel technique to automatically decompose an input object's volume into a set of parts that can be represented by two opposite height fields. Such decomposition enables the manufacturing of individual parts using two-piece reusable rigid molds. Our decomposition strategy relies on a new energy formulation that utilizes a pre-computed signal on the mesh volume representing the accessibility for a predefined set of extraction directions. Thanks to this novel formulation, our method allows for efficient optimization of a fabrication-aware partitioning of volumes in a completely automatic way. We demonstrate the efficacy of our approach by generating valid volume partitionings for a wide range of complex objects and physically reproducing several of them. Presentation slides (.pptx)","tags":null,"title":"Volume decomposition for two-piece rigid casting","type":"publication"},{"authors":null,"categories":null,"content":"The paper ‘Another Brick in the Wall: Improving the Assisted Semantic Segmentation of Masonry Walls’ by Gaia Pavoni, Francesca Giuliani, Anna De Falco, Massimiliano Corsini, Federico Ponchio, Marco Callieri, and Paolo Cignoni presented at the XVIII Eurographics Workshop on Graphics and Cultural Heritage (EG-GCH2020) has received the best paper award at the conference.\n","date":1605744e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1605744e3,"objectID":"a4c0ae4e156eba35f095dbb48f0fea42","permalink":"http://vcg.isti.cnr.it/post/20-11-19-best-paper-gch/","publishdate":"2020-11-19T00:00:00Z","relpermalink":"/post/20-11-19-best-paper-gch/","section":"post","summary":"The paper ‘Another Brick in the Wall: Improving the Assisted Semantic Segmentation of Masonry Walls’ by Gaia Pavoni, Francesca Giuliani, Anna De Falco, Massimiliano Corsini, Federico Ponchio, Marco Callieri, and Paolo Cignoni presented at the XVIII Eurographics Workshop on Graphics and Cultural Heritage (EG-GCH2020) has received the best paper award at the conference.","tags":null,"title":"Best paper at GCH2020","type":"post"},{"authors":null,"categories":null,"content":"An Interactive Digital System was developed by Gianpaolo Palma and Eliana Siotto of the Visual Computing Lab of ISTI-CNR to explore the frescoed ceiling of the Loggia of Cupid and Psyche at the time of the COVID-19. The system was created in collaboration with the Accademia Nazionale dei Lincei within the celebrations for the fifth centenary of Raphael’s death, and it is mentioned among the “136 reopening projects in Italy and worldwide”.\nThe system has encountered a great media promotion in the leading specialized magazines, national and local media, social network and web (TG3 (17’:35’), Rai Cultura, Arte Sky, Finestre sull’Arte, Arte Magazine, Corriere della Sera, Repubblica Roma, La Nazione di Pisa, Webinar – The Cyprus Institute, Webinar – Italian Cultural Institutes of the United States and Canada, etc.) with interesting effects on the cultural enjoyment.\nThe dedicated interactive system provides practical support at the exhibition ‘Raphael in Villa Farnesina: Galatea and Psyche’, opened today (October 6, 2020 – January 6, 2021).\n","date":1601942400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1601942400,"objectID":"9d856593271cdc0e32d1b66228c5840b","permalink":"http://vcg.isti.cnr.it/post/20-10-06-digital-loggia/","publishdate":"2020-10-06T00:00:00Z","relpermalink":"/post/20-10-06-digital-loggia/","section":"post","summary":"An Interactive Digital System was developed by Gianpaolo Palma and Eliana Siotto of the Visual Computing Lab of ISTI-CNR to explore the frescoed ceiling of the Loggia of Cupid and Psyche at the time of the COVID-19.","tags":null,"title":"A 'digital Loggia' for Raphael and his workshop in Villa Farnesina, Rome","type":"post"},{"authors":["Francesco Laccone","Luigi Malomo","Jesús Pérez","Nico Pietroni","Federico Ponchio","Bernd Bickel","Paolo Cignoni"],"categories":null,"content":"","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"33397c37cd4171cd36bcb44c82ef6fea","permalink":"http://vcg.isti.cnr.it/publication/2020/LMPPPBC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/LMPPPBC20/","section":"publication","summary":"Bending-active structures are able to efficiently produce complex curved shapes from flat panels. The desired deformation of the panels derives from the proper selection of their elastic properties. Optimized panels, called FlexMaps, are designed such that, once they are bent and assembled, the resulting static equilibrium configuration matches a desired input 3D shape. The FlexMaps elastic properties are controlled by locally varying spiraling geometric mesostructures, which are optimized in size and shape to match specific bending requests, namely the global curvature of the target shape. The design pipeline starts from a quad mesh representing the input 3D shape, which defines the edge size and the total amount of spirals: every quad will embed one spiral. Then, an optimization algorithm tunes the geometry of the spirals by using a simplified pre-computed rod model. This rod model is derived from a non-linear regression algorithm which approximates the non-linear behavior of solid FEM spiral models subject to hundreds of load combinations. This innovative pipeline has been applied to the project of a lightweight plywood pavilion named FlexMaps Pavilion, which is a single-layer piecewise twisted arch that fits a bounding box of 3.90x3.96x3.25 meters. This case study serves to test the applicability of this methodology at the architectural scale. The structure is validated via FE analyses and the fabrication of the full scale prototype. For more details on the prototype, please visit this webpage Our pavilion has been exhibited in the Italian pavilion of the 2021 17th Biennale Architettura in Venice","tags":null,"title":"A bending\u0026#8209;active twisted\u0026#8209;arch plywood structure: computational design and fabrication of the FlexMaps Pavilion","type":"publication"},{"authors":["Gianpaolo Palma","Eliana Siotto"],"categories":null,"content":"","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"a1be2653100e665917c5b0a6e3335038","permalink":"http://vcg.isti.cnr.it/publication/2020/PS20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/PS20/","section":"publication","summary":"","tags":null,"title":"A digital Loggia at the time of COVID-19","type":"publication"},{"authors":["Paolo Cignoni","Massimiliano Corsini","Gaia Pavoni"],"categories":null,"content":" ","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"5ec434387ffa4bd66bc1037909447a57","permalink":"http://vcg.isti.cnr.it/publication/2020/PCC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/PCC20/","section":"publication","summary":" ","tags":null,"title":"A State of the Art Technology in Large Scale Underwater Monitoring","type":"publication"},{"authors":["Gaia Pavoni","Francesca Giuliani","Anna De Falco","Massimiliano Corsini","Federico Ponchio","Marco Callieri","Paolo Cignoni"],"categories":null,"content":" ","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"86630d466a8642713756f7926804eb5c","permalink":"http://vcg.isti.cnr.it/publication/2020/PGDCPCC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/PGDCPCC20/","section":"publication","summary":"In Architectural Heritage, the masonry's interpretation is an essential instrument for analyzing the construction phases, the assessment of structural properties, and the monitoring of its state of conservation. This work is generally carried out by specialists that, based on visual observation and their knowledge, manually annotate ortho-images of the masonry generated by photogrammetric surveys. This results in vectorial thematic maps segmented according to their construction technique (isolating areas of homogeneous materials/structure/texture) or state of conservation, including degradation areas and damaged parts. This time-consuming manual work, often done with tools that have not been designed for this purpose, represents a bottleneck in the documentation and management workflow and is a severely limiting factor in monitoring large-scale monuments (e.g.city walls). This paper explores the potential of AI-based solutions to improve the efficiency of masonry annotation in Architectural Heritage. This experimentation aims at providing interactive tools that support and empower the current workflow, benefiting from specialists' expertise.","tags":null,"title":"Another Brick in the Wall: Improving the Assisted Semantic Segmentation of Masonry Walls","type":"publication"},{"authors":["Francesco Laccone","Luigi Malomo","Nico Pietroni","Maurizio Froli","Paolo Cignoni"],"categories":null,"content":"","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"c5dd82024a12f957389fca64ae16e218","permalink":"http://vcg.isti.cnr.it/publication/2020/LMPFC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/LMPFC20/","section":"publication","summary":"Shells made of structural glass are beautiful objects from both the aesthetics and the engineering point of view. However, they pose two significant challenges. The first one is to assure adequate safety and redundancy concerning possible global collapse. Being single-layered, in a shell made of structural glass, the brittle cracking of a single pane can lead to a sudden propagation of failure, up to instability. The second one is to guarantee cheap replacing possibilities for potentially collapsed components. This research explores a novel concept to address both requirements, where glass is both post-tensioned and reinforced and develops the research on TVT post-tensioned glass beams. Following the Fail- Safe Design (FSD) principles, a steel reinforcement relieves glass deficiencies (i.e. brittleness and low tensile strength). Following the Damage Avoidance Design (DAD) principles, glass segmentation and post-tensioning avoid the propagation of cracks. Up to now, glass-steel systems were limited to mono-dimensional elements (such as beams and columns) or simple bi-dimensional elements (arches, domes, barrel vaults). Instead, massive structures are usually realized as grid shells, where glass is used as simple cladding. This research investigates piecewise triangulated glass shells to enable the creation of 3D free-form glass-steel systems, where glass is load-bearing material. Hence, laminated glass panels are mechanically coupled with a filigree steel truss, whose elements are placed at the edges of the panel and act as an unbonded reinforcement. In a performance-based perspective, these steel trusses can be sized to bear at least the weight of all panels in the occurrence of simultaneous cracks (worst-case scenario). The panels are post-tensioned using a set of edge-aligned cables that add beneficial compressive stress on glass to prevent crack initiation. The cable placement and accompanying pre-loads are derived with an optimization strategy that minimizes the tensile stress acting on the shell. This optimization procedure also considers the practical constraints involved in the process. The results obtained through this automated procedure are later investigated using nonlinear FE analyses. The resulting structures optimize the total material usage providing contemporarily both transparency and load-bearing capabilities. Posttensioned shells excel in static performances, achieving high stiffness and good redundancy for the worst-case scenario, and improve the structural lightness and the visual impact with respect to state-of-the-art competitors.","tags":null,"title":"Automated Design and Analysis of Reinforced and Post-Tensioned Glass Shells","type":"publication"},{"authors":["Giovanni Pintore","Claudio Mura","Fabio Ganovelli","Lizeth Fuentes-Perez","Renato Pajarola","Enrico Gobbetti"],"categories":null,"content":"","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"8296cea4017c830fff49f3ca4c4cc9b7","permalink":"http://vcg.isti.cnr.it/publication/2020/PMGFPG20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/PMGFPG20/","section":"publication","summary":"","tags":null,"title":"Automatic 3D Reconstruction of Structured Indoor Environments","type":"publication"},{"authors":["Maurizio Froli","Francesco Laccone"],"categories":null,"content":" ","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"b25b7b3d0087db72f474d182e70aa942","permalink":"http://vcg.isti.cnr.it/publication/2020/FL20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/FL20/","section":"publication","summary":"The paper introduces a novel concept for structural glass shells that is based on the mechanical coupling of double curved heat-bent glass panels and a wire frame mesh, which constitutes a grid of unbonded edge-reinforcement. Additionally, this grid has the purpose of providing redundancy. The panels have load-bearing function, they are clamped at the vertices and dry-assembled. The main novelty lies in the use of polygonal curved panelswith a nodal force transfer mechanism. This concept has been validated on an illustrative design case of a 6 m-diameter suspended glass sphere, in which regular pentagonal and hexagonal spherical panels are employed. The good strength and stiffness achieved for this structure is demonstrated by means of local and global FE models. Another fundamental feature of the concept is that the reinforcement grid provides residual strength in the extreme scenarios in which all panels are completely failed. A quantitative measure of redundancy is obtained by comparing this scenario with the ULS.","tags":null,"title":"Conceptual design and FEM structural response of a suspended glass sphere made of reinforced curved polygonal panels","type":"publication"},{"authors":["Jinfan Yang","Chrystiano Araujo","Nicholas Vining","Zachary Ferguson","Enrique Rosales","Daniele Panozzo","Silvain Lefebvre","Paolo Cignoni","Alla Sheffer"],"categories":null,"content":" ","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"ee0d358e1f08a445e59a65da2c90cd6c","permalink":"http://vcg.isti.cnr.it/publication/2020/YAVFRPLCS20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/YAVFRPLCS20/","section":"publication","summary":" ","tags":null,"title":"DHFSlicer: double height-field slicing for milling fixed-height materials","type":"publication"},{"authors":["Francesco Laccone","Christian Louter","Maurizio Froli"],"categories":null,"content":"","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"af96f0e386fbc2a805d9c90d32950b3a","permalink":"http://vcg.isti.cnr.it/publication/2020/LLF20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/LLF20/","section":"publication","summary":"Glass exhibits brittle failure behavior. Therefore, redundancy is a fundamental design requirement when using glass as a main structural material. On this basis, a novel structural concept has been developed for hybrid glass-steel posttensioned triangulated structures, where the two materials collaborate. In forming such lattice structure, local fracture must be avoided. This paper presents a parametric study that highlights the influences of mechanical and geometrical parameters on the in-plane and out-of-plane static behaviour of laminated triangular glass panels. The resulting data set constitutes a useful source for the designer to select the most appropriate component. The main sensitivity parameters are panel length, laminate thickness, and interlayer stiffness.","tags":null,"title":"Glass-Steel Triangulated Structures: Parametric Nonlinear Finite-Element Analysis of In-Plane and Out-of-Plane Structural Response of Triangular Laminated Glass Panels","type":"publication"},{"authors":["Marco Livesu","Nico Pietroni","Enrico Puppo","Alla Sheffer","Paolo Cignoni"],"categories":null,"content":" GitHub Code\n","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"afabf87eabc3b64e31e9e0cd54a7e372","permalink":"http://vcg.isti.cnr.it/publication/2020/LPPSC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/LPPSC20/","section":"publication","summary":"We present a new fully automatic block-decomposition algorithm for feature-preserving, strongly hex-dominant meshing, that yields results with a drastically larger percentage of hex elements than prior art. Our method is guided by a surface field that conforms to both surface curvature and feature lines, and exploits an ordered set of cutting loops that evenly cover the input surface, defining an arrangement of loops suitable for hex-element generation. We decompose the solid into coarse blocks by iteratively cutting it with surfaces bounded by these loops. The vast majority of the obtained blocks can be turned into hexahedral cells via simple midpoint subdivision. GitHub Code","tags":null,"title":"LoopyCuts: Practical Feature-Preserving Block Decomposition","type":"publication"},{"authors":["Fabio Pellacini","Federico Ponchio","Filippo A. Fanni","Tinsae Gebrechristos Dulecha","Andrea Giachetti"],"categories":null,"content":"","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"6bfd8171eb7e684b9a3c1efecd8a43a3","permalink":"http://vcg.isti.cnr.it/publication/2020/GFPPG20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/GFPPG20/","section":"publication","summary":"","tags":null,"title":"Neural Reflectance Transformation Imaging","type":"publication"},{"authors":["Francesco Banterle","Alessandro Artusi","Alejandro Moreo","Fabio Carrara"],"categories":null,"content":"","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"5ec26ee6ef8f5d1c5a13133c5516507a","permalink":"http://vcg.isti.cnr.it/publication/2020/BAMC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/BAMC20/","section":"publication","summary":"","tags":null,"title":"NoR-VDPNet: A No-Reference High Dynamic Range Quality Metric Trained on HDR-VDP 2","type":"publication"},{"authors":["Gaia Pavoni","Massimiliano Corsini","Marco Callieri","Clinton Edwards","Paolo Cignoni"],"categories":null,"content":"","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"32ded4e12293dbd83658f66e457e6f01","permalink":"http://vcg.isti.cnr.it/publication/2020/PCCEC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/PCCEC20/","section":"publication","summary":"","tags":null,"title":"On Improving the Training of Models for the Semantic Segmentation of Benthic Communities from Orthographic Imagery","type":"publication"},{"authors":["Irene Filoscia","Thomas Alderighi","Daniela Giorgi","Luigi Malomo","Marco Callieri","Paolo Cignoni"],"categories":null,"content":" ","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"4e3d2008bb715323ad404b986ccafaf7","permalink":"http://vcg.isti.cnr.it/publication/2020/FAGMCC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/FAGMCC20/","section":"publication","summary":"We propose a method for the automatic segmentation of 3D objects into parts which can be individually 3D printed and then reassembled by preserving the visual quality of the final object. Our technique focuses on minimizing the surface affected by supports, decomposing the object into multiple parts whose printing orientation is automatically chosen. The segmentation reduces the visual impact on the fabricated model producing non-planar cuts that adapt to the object shape. This is performed by solving an optimization problem that balances the effects of supports and cuts, while trying to place both in occluded regions of the object surface. To assess the practical impact of the solution, we show a number of segmented, 3D printed and reassembled objects. https://diglib.eg.org/handle/10.1111/cgf13941","tags":null,"title":"Optimizing Object Decomposition to Reduce Visual Artifacts in 3D Printing","type":"publication"},{"authors":["Andrea Maggiordomo","Federico Ponchio","Paolo Cignoni","Marco Tarini"],"categories":null,"content":" Real-World Textured Things (RWTT)\nRWTT\nhttps://texturedmesh.isti.cnr.it/\nhttps://doi.org/10.1016/j.cagd.2020.101943/\n","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"5bd5605b4cad85a4892e04cd057d6aa0","permalink":"http://vcg.isti.cnr.it/publication/2020/MPCT20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/MPCT20/","section":"publication","summary":"We are witnessing a proliferation of textured 3D models captured from the real world with automatic photo-reconstruction tools by people and professionals without a proper technical background in computer graphics. Digital 3D models of this class come with a unique set of characteristics and defects - especially concerning their parametrization - setting them starkly apart from 3D models originating from other, more traditional, sources. We study this class of 3D models by collecting a significant number of representatives and quantitatively evaluating their quality according to several metrics. These include a new invariant metric we carefully design to assess the amount of fragmentation of the UV map, which is one of the main weaknesses potentially hindering the usability of these models. Our results back the widely shared notion that models of this new class are still not fit for direct use in downstream applications (such as videogames), and require challenging processing steps. Regrettably, existing automatic geometry processing tools are not always up to the task: for example, we verify that the available tools for UV optimization often fail due to mesh inconsistencies, geometric and topological noise, excessive resolution, or other factors; moreover, even when an output is produced, it rarely represents a significant improvement over the input (according to the aforementioned measures). Therefore, we argue that further advancements are required by the computer graphics and geometry processing communities specifically targeted at this class of models. Towards this goal, we share the models we collected in this study as a new public repository, Real-World Textured Things (RWTT), intended as a benchmark to systematic field-test and compare future algorithms. RWTT consists of 568 carefully selected textured 3D models representative of the most popular photo-reconstruction tools currently available. We also provide a web interface to browse the dataset by the metadata we collected during our experiments and a tool, TexMetro, to compute the same set of measures on generic UV mapped datasets. The Real-World Textured Things (RWTT) Dataset is available at https://texturedmesh.isti.cnr.it/ https://doi.org/10.1016/j.cagd.2020.101943/","tags":null,"title":"Real-World Textured Things: a Repository of Textured Models Generated with Modern Photo-Reconstruction Tools","type":"publication"},{"authors":["Francisca Gil-Ureta","Nico Pietroni","Denis Zorin"],"categories":null,"content":" ","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"376c56028559d75cc84c818c1af1b72f","permalink":"http://vcg.isti.cnr.it/publication/2020/GPZ20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/GPZ20/","section":"publication","summary":"We introduce an efficient method for designing shell reinforcements of minimal weight. Inspired by classical Michell trusses, we create a reinforcement layout whose members are aligned with optimal stress directions, then optimize their shape minimizing the volume while keeping stresses bounded. We exploit two predominant techniques for reinforcing shells: adding ribs aligned with stress directions and using thicker walls on regions of high stress. Most previous work can generate either only ribs or only variablethickness walls. However, in the general case, neither approach by itself will provide optimal solutions. By using a more precise volume model, our method is capable of producing optimized structures with the full range of qualitative behaviors: from ribs to walls, and smoothly transitioning in between. Our method includes new algorithms for determining the layout of reinforcement structure elements, and an efficient algorithm to optimize their shape, minimizing a non-linear non-convex functional at a fraction of the cost and with better optimality compared to standard solvers. We demonstrate the optimization results for a variety of shapes, and the improvements it yields in the strength of 3D-printed objects.","tags":null,"title":"Reinforcement of General Shell Structures","type":"publication"},{"authors":["Mario Salinas","Daniela Giorgi","Federico Ponchio","Paolo Cignoni"],"categories":null,"content":" Reviewernet.org\n","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"6122e57a8b070e1d0405f5e41a051267","permalink":"http://vcg.isti.cnr.it/publication/2020/SGPC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/SGPC20/","section":"publication","summary":"We propose ReviewerNet, an online, interactive visualization system aimed to improve the reviewer selection process in the academic domain. Given a paper submitted for publication, we assume that good candidate reviewers can be chosen among the authors of a small set of pertinent papers; ReviewerNet supports the construction of such set of papers, by visualizing and exploring a literature citation network. The system helps journal editors and Program Committee members to select reviewers that do not have any conflict-of-interest and are representative of different research groups, by visualising the careers and co-authorship relations of candidate reviewers. The system is publicly available, and is demonstrated in the field of Computer Graphics. The system is online at Reviewernet.org","tags":null,"title":"ReviewerNet: A visualization platform for the selection of academic reviewers","type":"publication"},{"authors":["Giovanni Pintore","Claudio Mura","Fabio Ganovelli","Lizeth Fuentes-Perez","Renato Pajarola","Enrico Gobbetti"],"categories":null,"content":" ","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"fc3cc57fbe663f05cc990f763798ff3b","permalink":"http://vcg.isti.cnr.it/publication/2020/PMGFPG20a/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/PMGFPG20a/","section":"publication","summary":" ","tags":null,"title":"State-of-the-Art in Automatic 3D Reconstruction of Structured Indoor Environments","type":"publication"},{"authors":["Daniela Giorgi","Marco Del Francia","Massimo Ferri","Paolo Cignoni"],"categories":null,"content":" Bridges 2020 presentation (.pptx)\n","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"ceeaea04fe4a7151998d319f9571e6f1","permalink":"http://vcg.isti.cnr.it/publication/2020/GDFC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/GDFC20/","section":"publication","summary":"The 19th century saw the development of a new branch of mathematics, topology, which studies the properties of geometrical objects that are invariant under continuous transformations. In the subsequent decades, topology would have a great influence on the way in which artists and architects sensed and represented space. Among them, the Italian architect Vittorio Giorgini (1926 - 2010) pioneered the topology-flavoured ideas of elastic surfaces and of form as a dynamic structure. Beside his architectural works, Giorgini left a few enchanting sculptures, in which he explored the connection between shape and topology. In this paper, we first present Giorgini's beautiful architectural designs, which were largely unrecognized in his lifetime, and they have only recently started to receive the attention they deserved. Then, we explain the topological ideas behind six of his sculptures, in a formal mathematical language. Surprisingly enough for non-mathematicians, four of his most famous sculptures - Modified Klein, Giorgini Sphere, Giorgini Torus I, and Giorgini Torus III - turn out to be topologically equivalent. This means that they can be continuously deformed into one another, even though their geometric appearances are very different from each other. We first illustrate by drawing the steps in the deformation process. Then, we provide a formal proof of the equivalence using basic notions from algebraic topology: non-orientable genus, Euler characteristic, and the classification theorem for surfaces. Giorgini designed his three-dimensional figures in-between the late 1960's and the first half of the 2000's. The figures only existed as bi-dimensional drawings for many years. Then, Giorgini asked David Dainelli and Alessandro Marzetti to carve alabaster sculptures from his drawings, in their artistic workshop in Volterra (Pisa, Italy), under his direct supervision. Giorgini's sculptures represent non-orientable surfaces. Intuitively, non-orientable surfaces are one-sided: one could paint in colour the whole surface without crossing its boundary and without detaching the brush. That would not be possible for orientable surfaces such as the familiar cylinder and sphere, which are two-sided. The first sculpture we present is Modified Klein, a Klein bottle with a disk removed. The Klein bottle is a well-known and fascinating example of a non-orientable surface, which not only is one-sided, but also closed (it has no boundaries) while it does not enclose an interior. As it often happens with physical reproductions of the Klein bottle, Giorgini cut a disk around the surface self-intersection. The other three sculptures named Giorgini Sphere, Giorgini Torus I, and Giorgini Torus III are constructed through variations on the same procedure: start from a sphere (a torus), cut away portions of the surface to make a cylinder, then connect the top and bottom boundaries of the cylinder with a strip without twisting, to get a non-orientable surface. What would sound surprising to a non-topologist is that, beside being neither spheres nor toruses, the three sculptures are topologically equivalent to Modified Klein. All four sculptures are non-orientable surfaces with one boundary, and after some calculations one can verify they all have non-orientable genus equal to 2: being the non-orientable genus a topological invariant, the four sculptures share the same topological type. In our paper, for illustration purposes, we draw eight steps in the deformation process which takes Modified Klein to Giorgini Torus I. Finally, we report on the topological type of two other sculptures: Giorgini Torus II, a non-orientable surface with three boundaries which has the topology of a Moebius strip minus two disks, and Giorgini Torus IV, a non-orientable surface with two boundaries which has the topology of a sphere with five holes, three of which are capped by Moebius strips.\nBridges 2020 presentation (.pptx)\nDeforming Modified Kein into Giorgini Torus I (.mp4)\n\n\n\nVittorio Giorgini: Architetture d'Alabastro, by Duccio Benvenuti","tags":null,"title":"Topological Classification of Vittorio Giorgini’s Sculptures","type":"publication"},{"authors":["Rachele Manganelli del Fà","Giovanni Pancani","Giovanni Minutoli","Andrea Arrighetti","Gabriella Poggesi","Marco Callieri"],"categories":null,"content":" ","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"cfee99e0d8a1b27f1e0cd15cf300f687","permalink":"http://vcg.isti.cnr.it/publication/2020/PAMPMC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/PAMPMC20/","section":"publication","summary":" ","tags":null,"title":"Tumulo etrusco della Montagnola: un viaggio virtuale","type":"publication"},{"authors":["Nicola Capece","Francesco Banterle","Paolo Cignoni","Fabio Ganovelli","Ugo Erra"],"categories":null,"content":"","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"79661e84a1fb12dc90ffed796d504a77","permalink":"http://vcg.isti.cnr.it/publication/2020/CBCGE20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/CBCGE20/","section":"publication","summary":"","tags":null,"title":"Turning a Smartphone Selfie Into a Studio Portrait ","type":"publication"},{"authors":["Maurizio Froli","Francesco Laccone","Agnese Natali"],"categories":null,"content":"","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"b6071e201fdda833229cb473a9e33b69","permalink":"http://vcg.isti.cnr.it/publication/2020/FLN20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/FLN20/","section":"publication","summary":"Transparency and structural lightness are inspiring ideas in the design of footbridges. Glass is the most performing transparent material to be used for structural purposes because of its high compressive strength, chemical stability, and absence of fatigue and viscosity phenomena at room temperature. However, its fragility constitutes a challenging limit in structural applications. This research provides and discusses a specific concept named TVTδ (Travi Vitree Tensegrity) for lightweight long-span beam-like footbridges made of structural glass. Hence, two design approaches of fail-safe design (FSD) and damage avoidance design (DAD) are applied to guarantee adequate safety levels and postcracking serviceability, respectively, with low damages on the main components. FSD provides the adoption of structural collaboration between glass and steel. Following DAD, glass is segmented into triangular panels, and reciprocal diffuse prestress is performed by steel tendons. This strategy assures low rehabilitation costs because only collapsed elements should be replaced once failed. At ultimate limit state (ULS), the TVTδ footbridge attains a global ductile behavior in which the yielding of steel tendons occurs before any fragile failure. Such result is achieved through a hierarchic calibration of the chain of failures. In glass panels, which are mostly precompressed, the buckling failure, representing the main risk, is delayed by the mutual stabilization of the panels' compressed edges with steel clamping. However, because an accidental event may cause a localized or diffuse brittle failure of glass components, the system is designed to maintain a residual load bearing capacity in this scenario. At the serviceability limit state (SLS), the TVTδ footbridge is highly stiffened by the presence of glass panes, partially encased in metallic frames. Crack initiation is delayed by precompression.","tags":null,"title":"TVTδ Concept for Long-Span Glass–Steel Footbridges","type":"publication"},{"authors":["Mattia Angelini","Vito Ferrulli","Francesco Banterle","Massimiliano Corsini","Maria Antonietta Pascali","Paolo Cignoni","Daniela Giorgi"],"categories":null,"content":" ","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"5add4c7e95033cdd1ec00b9a4dac48d8","permalink":"http://vcg.isti.cnr.it/publication/2020/AFBCPCG20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/AFBCPCG20/","section":"publication","summary":"We present the ongoing effort to build the first benchmark dataset for aestethic prediction on 3D models. The dataset is built on top of Sketchfab, a popular platform for 3D content sharing. In our dataset, the visual 3D content is aligned with aesthetics-related metadata: each 3D model is associated with a number of snapshots taken from different camera positions, the number of times the model has been viewed in-between its upload and its retrieval, the number of likes the model got, and the tags and comments received from users. The metadata provide precious supervisory information for data-driven research on 3D visual attractiveness and preference prediction. The paper contribution is twofold. First, we introduce an interactive platform for visualizing data about Sketchfab. We report a detailed qualitative and quantitative analysis of numerical scores (views and likes collected by 3D models) and textual information (tags and comments) for different 3D object categories. The analysis of the content of Sketchfab provided us the base for selecting a reasoned subset of annotated models. The second contribution is the first version of the ViDA 3D dataset, which contains the full set of content required for data-driven approaches to 3D aesthetic analysis. While similar datasets are available for images, to our knowledge this is the first attempt to create a benchmark for aestethic prediction for 3D models. We believe our dataset can be a great resource to boost research on this hot and far-from-solved problem.","tags":null,"title":"ViDA 3D: Towards a View-based Dataset for Aesthetic prediction on 3D models","type":"publication"},{"authors":["Alessandro Vecchione","Aurelia Lureau","Marco Callieri"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"136b947d50142184d8ea60ce457e9024","permalink":"http://vcg.isti.cnr.it/publication/2019/VLC19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/VLC19/","section":"publication","summary":"","tags":null,"title":"3D archaeological data management via web: The experience with 3DHOP software","type":"publication"},{"authors":["Anthony Pamart","Violette Abergel1","Federico Ponchio","Massimiliano Corsini","Matteo Dellepiane","Roberto Scopigno","Livio de Luca"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"d6a4ab862dcb7037b3d7c39012e8c459","permalink":"http://vcg.isti.cnr.it/publication/2019/PAPCDSD19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/PAPCDSD19/","section":"publication","summary":"","tags":null,"title":"A complete framework toward Spatially-Oriented RTI for CH documentation and analysis","type":"publication"},{"authors":["Maurizio Froli","Linda Giresini","Francesco Laccone"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"90ba280ca5ef63a753cb0306e3122bfa","permalink":"http://vcg.isti.cnr.it/publication/2019/FGL19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/FGL19/","section":"publication","summary":"A novel isolation device is introduced to seismically protect slender structures or historic assets within the philosophy of Damage Avoidance Design (DAD). This device is conceived to allow smooth, controlled and damped rocking thanks to spherical contact surfaces, elastic springs which ensure re-centering, frictional layers and viscous elastic dampers able to dissipate energy during motion. The conceptual framework of the device is analyzed, and corresponding equations of motions obtained for the equivalent two degrees-of-freedom system. The proposed Performance Based Approach allows identifying geometric and mechanical features of the system. Extensive dynamic analyses with spectra-compatible ground motions are performed and the primary contribution of friction, developed by the relative slip of the two spherical surfaces, is discussed. Finally, the dynamic response under selected earthquakes is evaluated by comparing the isolated and the corresponding not isolated response, to highlight the beneficial effects produced by the proposed isolation technique.","tags":null,"title":"A new seismic isolation device based on tribological smooth rocking (TROCKSISD)","type":"publication"},{"authors":["Roberto Scopigno","Marco Palma","Massimiliano Corsini","Gaia Pavoni"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"5e32a9545fc06538dd6af86e88d5ee06","permalink":"http://vcg.isti.cnr.it/publication/2019/PCPS19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/PCPS19/","section":"publication","summary":"The automatic recognition of natural structures is a challenging task in the supervised learning field. Complex morphologies are difficult to detect both from the networks, that may suffer from generalization issues, and from human operators, affecting the consistency of training datasets. The task of manual annotating biological structures is not comparable to a generic task of detecting an object (a car, a cat, or a flower) within an image. Biological structures are more similar to textures, and specimen borders exhibit intricate shapes. In this specific context, manual labelling is very sensitive to human error. The interactive validation of the predictions is a valuable resource to improve the network performance and address the inaccuracy caused by the lack of annotation consistency of human operators reported in literature. The proposed tool, inspired by the Yes/No Answer paradigm, integrates the semantic segmentation results coming from a CNN with the previous human labeling, allowing a more accurate annotation of thousands of instances in a short time. At the end of the validation, it is possible to obtain corrected statistics or export the integrated dataset and re-train the network.","tags":null,"title":"A Validation Tool For Improving Semantic Segmentation of Complex Natural Structures","type":"publication"},{"authors":["Mario Salinas","Daniela Giorgi","Federico Ponchio","Paolo Cignoni"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"9f4923ecef4a70d4f2a9a8a8c67ce270","permalink":"http://vcg.isti.cnr.it/publication/2019/SGPC19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/SGPC19/","section":"publication","summary":"We propose ReviewerNet, an online, interactive visualization system aimed to improve the reviewer selection process in the academic domain. Given a paper submitted for publication, we assume that good candidate reviewers can be chosen among the authors of a small set of pertinent papers; ReviewerNet supports the construction of such set of papers, by visualizing and exploring a literature citation network. Then, the system helps to select reviewers that are both well distributed in the scientific community and that do not have any conflict-of-interest, by visualising the careers and co-authorship relations of candidate reviewers. The system is publicly available, and is demonstrated in the field of Computer Graphics.","tags":null,"title":"A visualization tool for scholarly data","type":"publication"},{"authors":["Roberto Scopigno","Eliana Siotto","Gianpaolo Palma"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"9fbcb41fdea109501868b41841911c4e","permalink":"http://vcg.isti.cnr.it/publication/2019/PSS19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/PSS19/","section":"publication","summary":"","tags":null,"title":"Analisi dei frammenti di sectilia vitrei dalla villa romana di Aiano-Torraccia di Chiusi (SI) e studio della tecnica di esecuzione","type":"publication"},{"authors":["Francesco Laccone","Luigi Malomo","Maurizio Froli","Paolo Cignoni","Nico Pietroni"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"661fea473441ac71722234e353f9919d","permalink":"http://vcg.isti.cnr.it/publication/2019/LMFCP19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/LMFCP19/","section":"publication","summary":"We propose an optimization algorithm for the design of post-tensioned architectural shell structures, composed of triangular glass panels, in which glass has a load-bearing function. Due to its brittle nature, glass can fail when it is subject to tensile forces. Hence, we enrich the structure with a cable net, which is specifically designed to post-tension the shell, relieving the underlying glass structure from tension. We automatically derive an optimized cable layout, together with the appropriate pre-load of each cable. The method is driven by a physically-based static analysis of the shell subject to its service load. We assess our approach by applying non-linear FEM analysis to several real scale application scenarios. Such a method of cable tensioning produces glass shells that are optimized from the material usage viewpoint since they exploit the high compression strength of glass. As a result, they are lightweight and robust. Both aesthetic and static qualities are improved with respect to grid shell competitors. DOI: 10.1111/cgf.13801","tags":null,"title":"Automatic Design of Cable-Tensioned Glass Shells","type":"publication"},{"authors":["Giovanni Pintore","Fabio Ganovelli","Alberto Jaspe Villanueva","Enrico Gobbetti"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"40c06b6b99981d308873c3e2c9197932","permalink":"http://vcg.isti.cnr.it/publication/2019/PGJG19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/PGJG19/","section":"publication","summary":"We present a novel and light-weight approach to capture and reconstruct structured 3D models of multi-room floor plans. Starting from a small set of registered panoramic images, we automatically generate a 3D layout of the rooms and of all the main objects inside. Such a 3D layout is directly suitable for use in a number of real-world applications, such as guidance, location, routing, or content creation for security and energy management. Our novel pipeline introduces several contributions to indoor reconstruction from purely visual data. In particular, we automatically partition panoramic images in a connectivity graph, according to the visual layout of the rooms, and exploit this graph to support object recovery and rooms boundaries extraction. Moreover, we introduce a plane-sweeping approach to jointly reason about the content of multiple images and solve the problem of object inference in a top-down 2D domain. Finally, we combine these methods in a fully automated pipeline for creating a structured 3D model of a multi-room floor plan and of the location and extent of clutter objects. These contribution make our pipeline able to handle cluttered scenes with complex geometry that are challenging to existing techniques. The effectiveness and performance of our approach is evaluated on both real-world and synthetic models.","tags":null,"title":"Automatic modeling of cluttered multi-room floor plans from panoramic images","type":"publication"},{"authors":["Thomas Alderighi","Daniela Giorgi","Luigi Malomo","Paolo Cignoni","Monica Zoppè"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"5fdd08b0958ab8fe03fb170a1ebc4908","permalink":"http://vcg.isti.cnr.it/publication/2019/AGMCZ19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/AGMCZ19/","section":"publication","summary":"We propose a fabrication technique for the fast and cheap production of 3D replicas of proteins. We leverage silicone casting with rigid molds, to produce flexible models which can be safely extracted from the mold, and easily manipulated to simulate the biological interaction mechanisms between proteins. We believe that tangible models can be useful in education as well as in laboratory settings, and that they will ease the understanding of fundamental principles of macromolecular organization.","tags":null,"title":"Computational fabrication of macromolecules to enhance perception and understanding of biological mechanisms","type":"publication"},{"authors":["Francesco Laccone","Luigi Malomo","Maurizio Froli","Paolo Cignoni","Nico Pietroni"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"27eb0900b915c08d80bfe7fd79294ca5","permalink":"http://vcg.isti.cnr.it/publication/2019/LMFCP19a/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/LMFCP19a/","section":"publication","summary":"Shells made of structural glass are charming objects from both the aesthetics and the engineering point of view. However, they pose two signicant challenges: the rst one is to assure adequate safety and redundancy concerning possible global collapse; the second one is to guarantee the economy for replacing collapsed components. To address both requirements, this research explores a novel concept where triangular panels of structural glass are both post-tensioned and reinforced to create 3D free-form systems. Hence, the ligree steel truss, made of edges reinforcements, is sized in performance-based perspective to bear at least the weight of all panels in the occurrence of simultaneous cracks (worst-case scenario). The panels are post-tensioned using a set of edge-aligned cables that add benecial compressive stress on the surface. The cable placement and pre-loads are optimized to minimize the tensile stress acting on the shell and match the manufacturing constraints. These shells optimize material usage by providing not only a transparent and fascinating building separation but also load-bearing capabilities. Visual and structural lightness are improved to grid shell competitors.","tags":null,"title":"Concept and cable-tensioning optimization of post-tensioned shells made of structural glass","type":"publication"},{"authors":["Nicola Capece","Francesco Banterle","Paolo Cignoni","Fabio Ganovelli","Roberto Scopigno","Ugo Erra"],"categories":null,"content":" 10.1016/j.image.2019.05.013\n","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"e38a7e3c0b5b83b8de0e2fd0d16bfe50","permalink":"http://vcg.isti.cnr.it/publication/2019/CBCGSE19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/CBCGSE19/","section":"publication","summary":"Abstract We present a method for turning a flash selfie taken with a smartphone into a photograph as if it was taken in a studio setting with uniform lighting. Our method uses a convolutional neural network trained on a set of pairs of photographs acquired in an ad-hoc acquisition campaign. Each pair consists of one photograph of a subject's face taken with the camera flash enabled and another one of the same subject in the same pose illuminated using a photographic studio-lighting setup. We show how our method can amend defects introduced by a close-up camera flash, such as specular highlights, shadows, skin shine, and flattened images. Website to the official publication: Signal Processing: Image Communication. DOI: 10.1016/j.image.2019.05.013. Results Samples of validation data. Each group of images is composed of: the original image taken with the smartphone flash (top left); the flash image to which the bilateral filter was applied (bottom left); the image reconstructed by the difference prediction of the CNN (center); the ground truth reconstructed (top right); the ground truth (bottom right). \\revision{The SSIM was computed by comparing the central image of each group and the image at top right.","tags":null,"title":"Deep Flash : Turning a Flash Selfie Into a Studio Portrait","type":"publication"},{"authors":["Roberto Scopigno","Gabriele Guidi","Roberto Bellucci","Eliana Siotto","Paolo Pingi","Gianpaolo Palma"],"categories":null,"content":" ","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"1b14ab7b888b64589eb10d100c2265c6","permalink":"http://vcg.isti.cnr.it/publication/2019/PPSBGS19a/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/PPSBGS19a/","section":"publication","summary":"3D scanning is an effective technology for dealing at different levels the state of conservation/deformation of a panel painting, from the micro-geometry of the craquelure to the macro-geometry of the supported used. Unfortunately, the current solutions used to analyze multiple 3D scans acquired over time are based on very controlled acquisition procedures, such as the use of target reference points that are stationary over time and fixed to the artwork, or on complex hardware setups to keep the acquisition device fixed to the artwork. These procedures are challenging when a long monitoring period is involved or during restoration when the painting may be moved several times. This paper presents a new and robust approach to observe and quantify the panel deformations of artworks by comparing 3D models acquired with different scanning devices at different times. The procedure is based on a non-rigid registration algorithm that deforms one 3D model over the other in a controlled way, extracting the real deformation field. We apply the method to the 3D scanning data of the unfinished panel painting ``Adorazione dei Magi'' by Leonardo da Vinci. The data were acquired in 2002 and 2015. First, we analyze the two 3D models with the classical distance from the ideal flat plane of the painting. Then we study the type of deformation of each plank of the support by fitting a quadric surface. Finally, we compare the models before and after the deformation computed by a non-rigid registration algorithm. This last comparison enables the panel deformation to be separated from the structural changes (e.g. the structural restorations on the back and the missing pieces) of the artwork in a more robust way.","tags":null,"title":"Deformation analysis of Leonardo da Vinci\u0026apos;s \u0026ldquo;Adorazione dei Magi\u0026rdquo; through temporal unrelated 3D digitization","type":"publication"},{"authors":["Massimo Zallocco","Holly Wright","Lior Wolf","Lorenc Vila","Roberto Scopigno","Julian Richards","Michael Remmy","Eva Miguel Gascon","Marisol Madrid I Fernandez","Barak Itkin","Miguel Angel Hervas","Maria Letizia Gualandi","Gabriele Gattiglia","Tim Evans","Diego Lucendo Diaz","Nachum Dershowitz","Marco Callieri","Jaume Buxeda i Garrigos","Francesco Banterle","Francesca Anichini"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"20507f8ffe63c5b282f0ef2b05d032bf","permalink":"http://vcg.isti.cnr.it/publication/2019/ABBCDDEGGHIMMRRSVWWZ/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/ABBCDDEGGHIMMRRSVWWZ/","section":"publication","summary":"","tags":null,"title":"Developing the ArchAIDE application: A digital workflow for identifying, organising and sharing archaeological pottery using automated image recognition","type":"publication"},{"authors":["Maurizio Froli","Linda Giresini","Francesco Laccone"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"f9c4f0e046abb8c58948a46f0039f8df","permalink":"http://vcg.isti.cnr.it/publication/2019/FGL19a/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/FGL19a/","section":"publication","summary":"In the field of seismic risk mitigation of art objects, an innovative isolation device is here il-lustrated. The device, called TROCKSISD (Tribological ROCKing Seismic ISolation Device), couples multiple components to dissipate energy and control smooth rocking: spherical con-tact surfaces with frictional layers, elastic springs ensuring re-centering and viscous elastic dampers. The conceptual idea is described and the equations of motions of the two degrees of freedom system presented, discussing the performance-based structural behaviour and the mechanical/geometric parameters involved. Moreover, dynamic analyses are performed to understand the role of the frictional layers with respect to the peripheral dampers in the miti-gation of motion under spectrum compatible seismic records. The results in terms of rocking spectra are presented and comparisons with the equivalent single degree of freedom system without the isolation device are made.","tags":null,"title":"Dynamics of a new seismic isolation device based on tribological smooth rocking (TROCKSISD)","type":"publication"},{"authors":["Federico Ponchio","Marco Callieri","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"1639fc9a93070ce9b7efa809a6c5ab03","permalink":"http://vcg.isti.cnr.it/publication/2019/PCDS19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/PCDS19/","section":"publication","summary":"","tags":null,"title":"Effective Annotations Over 3D Models","type":"publication"},{"authors":["Alessandro Artusi","Francesco Banterle","Alejandro Moreo","Fabio Carrara"],"categories":null,"content":" link to the paper\n","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"e445cbb3e191b8ec811eafe758563800","permalink":"http://vcg.isti.cnr.it/publication/2019/ABMC19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/ABMC19/","section":"publication","summary":"Abstract Image metrics based on Human Visual System (HVS) play a remarkable role in the evaluation of complex image processing algorithms. However, mimicking the HVS is known to be complex and computationally expensive (both in terms of time and memory), and its usage is thus limited to a few applications and to small input data. All of this makes such metrics not fully attractive in real-world scenarios. To address these issues, we propose Deep Image Quality Metric (DIQM), a deep-learning approach to learn the global image quality feature (mean-opinion-score). DIQM can emulate existing visual metrics efficiently, reducing the computational costs by more than an order of magnitude with respect to existing implementations.\n\n\nTimings Our method is extremely computationally efficient because the transfer of knowledge from HDR-VDP to a CNN allows us to speed-up computations by performing only simple convolutions. When we compare our method (DIQM) to classic HDR-VDP (MATLAB implementation and its CUDA version), we can measure 1-2 orders of magnitude of speed-up.\n\n\n\n\n\n\nApplications Our method can be employed to optimize the parameters for HDR compression, tone mapping, and inverse tone mapping. This can be achieved with classic metrics such as HDR-VDP and DRIIM. However, these metrics are computationally expensive and a lot of time (e.g., minutes) would be required to optimize the parameters of a low-resolution image. Our method can manage these tasks in a few seconds.\n\n\n\n\n\n\n\nTone mapped HDR image without parameters optimization. Tone mapped HDR image with parameters optimization using our method.\n\n\n\n\n\n\n\n\nlink to the paper","tags":null,"title":"Efficient Evaluation of Image Quality via Deep-Learning Approximation of Perceptual Metrics ","type":"publication"},{"authors":["Francesco Laccone","Luigi Malomo","Jesús Pérez","Nico Pietroni","Federico Ponchio","Bernd Bickel","Paolo Cignoni"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"427afceef1b19f1fd3b34a9966357c77","permalink":"http://vcg.isti.cnr.it/publication/2019/LMPPPBC19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/LMPPPBC19/","section":"publication","summary":"Bending-active structures are able to efficiently produce complex curved shapes starting from flat panels. The desired deformation of the panels derives from the proper selection of their elastic properties. Optimized panels, called FlexMaps, are designed such that, once they are bent and assembled, the resulting static equilibrium configuration matches a desired input 3D shape. The FlexMaps elastic properties are controlled by locally varying spiraling geometric mesostructures, which are optimized in size and shape to match the global curvature (i.e., bending requests) of the target shape. The design pipeline starts from a quad mesh representing the input 3D shape, which determines the edge size and the total amount of spirals: every quad will embed one spiral. Then, an optimization algorithm tunes the geometry of the spirals by using a simplified pre-computed rod model. This rod model is derived from a non-linear regression algorithm which approximates the non-linear behavior of solid FEM spiral models subject to hundreds of load combinations. This innovative pipeline has been applied to the project of a lightweight plywood pavilion named FlexMaps Pavilion, which is a single-layer piecewise twisted arc that fits a bounding box of 3.90x3.96x3.25 meters.","tags":null,"title":"FlexMaps Pavilion: a twisted arc made of mesostructured flat flexible panels","type":"publication"},{"authors":["Matteo Bracci","Marco Tarini","Nico Pietroni","Marco Livesu","Paolo Cignoni"],"categories":null,"content":" www.hexalab.net\n","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"4a45fbb559c826bec6fe37c961cfd8af","permalink":"http://vcg.isti.cnr.it/publication/2019/BTPLC19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/BTPLC19/","section":"publication","summary":"We introduce HexaLab: a WebGL application for real time visualization, exploration and assessment of hexahedral meshes. HexaLab can be used by simply opening www.hexalab.net. Our visualization tool targets both users and scholars. Practitioners who employ hexmeshes for Finite Element Analysis, can readily check mesh quality and assess its usability for simulation. Researchers involved in mesh generation may use HexaLab to perform a detailed analysis of the mesh structure, isolating weak points and testing new solutions to improve on the state of the art and generate high quality images. To this end, we support a wide variety of visualization and volume inspection tools. Our system offers also immediate access to a repository containing all the publicly available meshes produced with the most recent techniques for hexmesh generation. We believe HexaLab, providing a common tool for visualizing, assessing and distributing results, will push forward the recent strive for replicability in our scientific community","tags":null,"title":"HexaLab.net: An online viewer for hexahedral meshes","type":"publication"},{"authors":["Manuele Sabbadin","Gianpaolo Palma","Francesco Banterle","Tamy Boubekeur","Paolo Cignoni"],"categories":null,"content":" Slides ","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"d7bcf57b12a9b8e525824d5fd825682d","permalink":"http://vcg.isti.cnr.it/publication/2019/SPBBC19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/SPBBC19/","section":"publication","summary":"Acquired 3D point clouds make possible quick modeling of virtual scenes from the real world.With modern 3D capture pipelines, each point sample often comes with additional attributes such as normal vector and color response. Although rendering and processing such data has been extensively studied, little attention has been devoted using the light transport hidden in the recorded per-sample color response to relight virtual objects in visual effects (VFX) look-dev or augmented reality (AR) scenarios. Typically, standard relighting environment exploits global environment maps together with a collection of local light probes to reflect the light mood of the real scene on the virtual object. We propose instead a unified spatial approximation of the radiance and visibility relationships present in the scene, in the form of a colored point cloud. To do so, our method relies on two core components: High Dynamic Range (HDR) expansion and real-time Point-Based Global Illumination (PBGI). First, since an acquired color point cloud typically comes in Low Dynamic Range (LDR) format, we boost it using a single HDR photo exemplar of the captured scene that can cover part of it. We perform this expansion efficiently by first expanding the dynamic range of a set of renderings of the point cloud and then projecting these renderings on the original cloud. At this stage, we propagate the expansion to the regions not covered by the renderings or with low-quality dynamic range by solving a Poisson system. Then, at rendering time, we use the resulting HDR point cloud to relight virtual objects, providing a diffuse model of the indirect illumination propagated by the environment. To do so, we design a PBGI algorithm that exploits the GPU's geometry shader stage as well as a new mipmapping operator, tailored for G-buffers, to achieve real-time performances. As a result, our method can effectively relight virtual objects exhibiting diffuse and glossy physically-based materials in real time. Furthermore, it accounts for the spatial embedding of the object within the 3D environment. We evaluate our approach on manufactured scenes to assess the error introduced at every step from the perfect ground truth. We also report experiments with real captured data, covering a range of capture technologies, from active scanning to multiview stereo reconstruction. \t \t\t \t Slides","tags":null,"title":"High Dynamic Range Point Clouds for Real-Time Relighting","type":"publication"},{"authors":["Ific Goudé","Rémi Cozot","Francesco Banterle"],"categories":null,"content":"link\n","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"3f0ea5f1e512968dfbb47581e17eb610","permalink":"http://vcg.isti.cnr.it/publication/2019/GCB19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/GCB19/","section":"publication","summary":"Abstract We propose a Tone Mapping Operator, denoted HMD-TMO, dedicated to the visualization of 360° High Dynamic Range images on Head Mounted Displays. The few existing studies about this topic have shown that the existing Tone Mapping Operators for classic 2D images are not adapted to 360° High Dynamic Range images. Consequently, several dedicated operators have been proposed. Instead of operating on the entire 360° image, they only consider the part of the image currently viewed by the user. Tone mapping a part of the 360° image is less challenging as it does not preserve the global luminance dynamic of the scene. To cope with this problem, we propose a novel tone mapping operator which takes advantage of both a view-dependant tone mapping that enhances the contrast, and a Tone Mapping Operator applied to the entire 360° image that preserves global coherency. Furthermore, we present a subjective study to model lightness perception in a Head Mounted Display. Official link to the publication.","tags":null,"title":"HMD-TMO: A Tone Mapping Operator for 360 HDR Images Visualization for Head Mounted Displays","type":"publication"},{"authors":["Eliana Siotto"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"7e86fcf8e31295fa6779f62437157c5c","permalink":"http://vcg.isti.cnr.it/publication/2019/Sio19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/Sio19/","section":"publication","summary":"","tags":null,"title":"Identification of gilding techniques on Roman marble sarcophagi","type":"publication"},{"authors":["Massimiliano Corsini","Francesco Banterle","Federico Ponchio","Paolo Cignoni"],"categories":null,"content":" link to the paper\n","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"6695161019e8dfd5e2aea8e16b5225f0","permalink":"http://vcg.isti.cnr.it/publication/2019/CBPC19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/CBPC19/","section":"publication","summary":"Abstract In the last years, the development of compression algorithms for image collections (e.g., photo albums) has become very popular due to the enormous diffusion of digital photographs. Typically, current solutions create an image sequence from images of the photo album to make them suitable for compression using a High Performance Video Coding (HEVC) encoder. In this study, we investigated a different approach to compress a collection of similar images. Our main idea is to exploit the inter- and intra- patch redundancy to compress the entire set of images. In practice, our approach is equivalent to compress the image set with Vector Quantization (VQ) using a global codebook. Our tests show that our clusterization algorithm is effective for a large number of images.\n\n\n\nlink to the paper","tags":null,"title":"Image Sets Compression via Patch Redundancy ","type":"publication"},{"authors":["Alessandro Muntoni","Stefano Nuvoli","Andreas Scalas","Alessandro Tola","Luigi Malomo","Riccardo Scateni"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"6bb7bfc4c41dc3a5df23f187017b5087","permalink":"http://vcg.isti.cnr.it/publication/2019/MNSTMS19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/MNSTMS19/","section":"publication","summary":"We introduce a pipeline for simplifying digital 3D shapes and fabricate them using 2D polygonal flat parts. Our method generates shapes that, once unfolded, can be fabricated with CNC milling machines using special tools called V-Grooves. These tools create V-shaped furrows at given angles depending on the shape of the used tool. Milling the edges of each flat facet simplifies the manual assembly, which consists only in folding adjacent facets at a constrained angle. Our method generates simplified shapes where every dihedral angle between adjacent facets belongs to a restricted set, thus making the assembly process quicker and more straightforward. Firstly, our method automatically computes a simplified version of the input model, using the marching cubes algorithm on the original mesh and iteratively performing local changes on the resulting triangle mesh. The user can then perform an additional manual simplification to remove unwanted facets. Finally, an unfolding algorithm, which takes into account the thickness of the material, flattens the polygonal facets onto the 2D plane, so that a CNC milling machine can fabricate it from a sheet of rigid material.","tags":null,"title":"Mill and fold: Shape simplification for fabrication","type":"publication"},{"authors":["Stefano Nuvoli","Alex Hernandez","Claudio Esperança","Riccardo Scateni","Paolo Cignoni","Nico Pietroni"],"categories":null,"content":"here\n","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"a5789efe0d49952b845607218a6f5060","permalink":"http://vcg.isti.cnr.it/publication/2019/NHESCP19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/NHESCP19/","section":"publication","summary":"We propose QuadMixer, a novel interactive technique to compose quad mesh components preserving the majority of the original layouts. Quad Layout is a crucial property for many applications since it conveys important information that would otherwise be destroyed by techniques that aim only at preserving shape. Our technique keeps untouched all the quads in the patches which are not involved in the blending. We rst perform robust boolean operations on the corresponding triangle meshes. Then we use this result to identify and build new surface patches for small regions neighboring the intersection curves. These blending patches are carefully quadrangulated respecting boundary constraints and stitched back to the untouched parts of the original models. The resulting mesh preserves the designed edge ow that, by construction, is captured and incorporated to the new quads as much as possible. We present our technique in an interactive tool to show its usability and robustness.\n\n\nClick here download the slides.","tags":null,"title":"QuadMixer: Layout Preserving Blending of Quadrilateral Meshes","type":"publication"},{"authors":["Marco Potenziani","Paolo Pingi","Gaia Pavoni","Aurelia Lureau","Matteo Dellepiane","Marco Callieri","Roberto Scopigno"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"91d8b1817e0830b466779550b13c7faf","permalink":"http://vcg.isti.cnr.it/publication/2019/CDLPPPS19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/CDLPPPS19/","section":"publication","summary":"","tags":null,"title":"Rilievo 3D di Alchimia, ed uso dei modelli 3D per studio e divulgazione","type":"publication"},{"authors":["Marco Callieri","Massimiliano Corsini","Gaia Pavoni","Marco Palma","Roberto Scopigno"],"categories":null,"content":" ","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"208cb1be7e25272c19c3f243717f4c46","permalink":"http://vcg.isti.cnr.it/publication/2019/PCCPS19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/PCCPS19/","section":"publication","summary":"Visual sampling techniques represent a valuable resource for a rapid, non-invasive data acquisition for underwater monitoring purposes. Long-term monitoring projects usually requires the collection of large quantities of data, and the visual analysis of a human expert operator remains, in this context, a very time consuming task. It has been estimated that only the 1-2% of the acquired images are later analyzed by scientists (Beijbom et al., 2012). Strategies for the automatic recognition of benthic communities are required to effectively exploit all the information contained in visual data. Supervised learning methods, the most promising classification techniques in this field, are commonly affected by two recurring issues: the wide diversity of marine organism, and the small amount of labeled data. In this work, we discuss the advantages offered by the use of annotated high resolution ortho-mosaics of seabed to classify and segment the investigated specimens, and we suggest several strategies to obtain a considerable per-pixel classification performance although the use of a reduced training dataset composed by a single ortho-mosaic. The proposed methodology can be applied to a large number of different species, making the procedure of marine organism identification an highly adaptable task.","tags":null,"title":"Semantic Segmentation of Benthic Communities from Ortho-Mosaic Maps","type":"publication"},{"authors":["Patrick Marais","Matteo Dellepiane","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"7e75bfb808413484969a495620653363","permalink":"http://vcg.isti.cnr.it/publication/2019/MDCS19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/MDCS19/","section":"publication","summary":" ","tags":null,"title":"Semi-automated Cleaning of Laser Scanning Campaigns with Machine Learning","type":"publication"},{"authors":["Nico Pietroni","Bernd Bickel","Luigi Malomo","Paolo Cignoni"],"categories":null,"content":"Link to the State of the Art Document\nLink to the Presentation\n","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"28c79134ae3b6a62c915cb93fbd50f53","permalink":"http://vcg.isti.cnr.it/publication/2019/PBMC19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/PBMC19/","section":"publication","summary":"Digital fabrication devices are powerful tools for creating tangible reproductions of 3D digital models. Most available printing technologies aim at producing an accurate copy of a tridimensional shape. However, fabrication technologies can also be used to create a stylistic representation of a digital shape. We refer to this class of methods as \"stylized fabrication methods.\" These methods abstract geometric and physical features of a given shape to create an unconventional representation, to produce an optical illusion, or to devise a particular interaction with the fabricated model. In this state-of-the-art report, we classify and overview this broad and emerging class of approaches and also propose possible directions for future research.\t Link to the State of the Art Document Link to the Presentation","tags":null,"title":"State of the Art on Stylized Fabrication","type":"publication"},{"authors":["Mattia G. Bergomi","Patrizio Frosini","Daniela Giorgi","Nicola Quercioli"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"692bb719431009875617e6cd54e7da77","permalink":"http://vcg.isti.cnr.it/publication/2019/BFGQ19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/BFGQ19/","section":"publication","summary":"We provide a general mathematical framework for group and set equivariance in machine learning. We define group equivariant non-expansive operators (GENEOs) as maps between function spaces associated with groups of transformations. We study the topological and metric properties of the space of GENEOs to evaluate their approximating power and set the basis for general strategies to initialize and compose operators. We define suitable pseudo-metrics for the function spaces, the equivariance groups and the set of non-expansive operators. We prove that, under suitable assumptions, the space of GENEOs is compact and convex. These results provide fundamental guarantees in a machine learning perspective. By considering isometry-equivariant non-expansive operators, we describe a simple strategy to select and sample operators. Thereafter, we show how selected and sampled operators can be used both to perform classical metric learning and to inject knowledge in artificial neural networks. Paper","tags":null,"title":"Towards a topological–geometrical theory of group equivariant non-expansive operators for data analysis and machine learning","type":"publication"},{"authors":["Riccardo Costanzi","Arianna Gasparri","Francesca Pacienza","Lorenzo Pollini","Andrea Caiti","Vincenzo Manzari","Daniele Terracciano","Mirko Stifani","Gaia Pavoni","Marco Callieri","Cinzia Barbieri","Fabrizia Colonna","Federico Gaino","Paolo Moretto","Carlo Emanuele Pepe","Andrea Romanelli"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"66ad6f677017d25bf99dc73676fa72ad","permalink":"http://vcg.isti.cnr.it/publication/2019/CGPPCMTSPCBCGMPR19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/CGPPCMTSPCBCGMPR19/","section":"publication","summary":"","tags":null,"title":"Visual acquisition system for georeferenced monitoring and reconstruction of the sea bottom using audio for data synchronisation","type":"publication"},{"authors":["Thomas Alderighi","Luigi Malomo","Daniela Giorgi","Bernd Bickel","Paolo Cignoni","Nico Pietroni"],"categories":null,"content":" Pentagonal Icositetrahedron Laura Taalman\u0026gt;\nPresentation slides (.pptx)\n","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"c63087240ad1b8d4acba322f106a2647","permalink":"http://vcg.isti.cnr.it/publication/2019/AMGBCP19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/AMGBCP19/","section":"publication","summary":"We propose a novel technique for the automatic design of molds to cast highly complex shapes. The technique generates composite, two-piece molds. Each mold piece is made up of a hard plastic shell and a flexible silicone part. Thanks to the thin, soft, and smartly shaped silicone part, which is kept in place by a hard plastic shell, we can cast objects of unprecedented complexity. An innovative algorithm based on a volumetric analysis defines the layout of the internal cuts in the silicone mold part. Our approach can robustly handle thin protruding features and intertwined topologies that have caused previous methods to fail. We compare our results with state of the art techniques, and we demonstrate the casting of shapes with extremely complex geometry. Acknowledgment Errata Corrige: we forgot to list in the acknowledgment the source of one of the model the caged knot, namely the one used in the above teaser. The Catalan Solid cage containing the knot is a derivative work of the Pentagonal Icositetrahedron by Laura Taalman\u003e Presentation slides (.pptx)","tags":null,"title":"Volume-Aware Design of Composite Molds","type":"publication"},{"authors":["Ute Dercks","Federico Ponchio","Roberto Scopigno"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"2f2906d1b7928e017ea97ba9be21534f","permalink":"http://vcg.isti.cnr.it/publication/2018/DPS18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/DPS18/","section":"publication","summary":"","tags":null,"title":"\tCENOBIUM 10 years after: an evolving platform for Digital Humanities ","type":"publication"},{"authors":["Giovanni Pintore","Fabio Ganovelli","Ruggero Pintus","Roberto Scopigno","Enrico Gobbetti"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"123d682e387f2b1275d30fb21597e4f8","permalink":"http://vcg.isti.cnr.it/publication/2018/PGPSG18a/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PGPSG18a/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstract We present a novel approach to automatically recover, from a small set of partially overlapping spherical images, an indoor structure representation in terms of a 3D floor plan registered with a set of 3D environment maps. % We introduce several improvements over previous approaches based on color/spatial reasoning exploiting \\emph{Manhattan World} priors. In particular, we introduce a new method for geometric context extraction based on a 3D facets representation, which combines color distribution analysis of individual images with sparse multi-view clues. Moreover, we introduce an efficient method to combine the facets from different points of view in a single consistent model, considering the reliability of the facets contribution. The resulting capture and reconstruction pipeline automatically generates 3D multi-room environments where most of the other previous approaches fail, such as in presence of hidden corners and large clutter, even without involving additional dense 3D data or tools. % We demonstrate the effectiveness and performance of our approach on different real-world indoor scenes. Our test data will be released to allow for further studies and comparisons.","tags":null,"title":"3D Floor Recovery from Overlapping Spherical Images","type":"publication"},{"authors":["Paola Derudas","Maria Carla Sgarella","Marco Callieri"],"categories":null,"content":" ","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"ab6635853efe4f117b920a70f80328ad","permalink":"http://vcg.isti.cnr.it/publication/2018/DSC18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/DSC18/","section":"publication","summary":" ","tags":null,"title":"A 3D Digital Approach for the Study and Presentation of the Bisarcio Site","type":"publication"},{"authors":["Federico Ponchio","Massimiliano Corsini","Roberto Scopigno"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"b75a65afc7418594912b16edf86f15a3","permalink":"http://vcg.isti.cnr.it/publication/2018/PCS18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PCS18/","section":"publication","summary":"","tags":null,"title":"A Compact Representation of Relightable Images for the Web","type":"publication"},{"authors":["Eliana Siotto","Gianpaolo Palma","Marco Potenziani","Roberto Scopigno"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"ce87b70458e7e2dac21fa30aca681321","permalink":"http://vcg.isti.cnr.it/publication/2018/SPPS18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/SPPS18/","section":"publication","summary":"","tags":null,"title":"A Web-based system for data integration and visualization of the ancient colour ","type":"publication"},{"authors":["Alessandro Artusi","Tania Pouli","Francesco Banterle","Ahmet Oguz Akyuz"],"categories":null,"content":"link to the paper\n","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"74f45e795011fef2a536663b64637e20","permalink":"http://vcg.isti.cnr.it/publication/2018/APBA18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/APBA18/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstract High dynamic range (HDR) images require tone reproduction to match the range of values to the capabilities of a display. For computational reasons and given the absence of fully calibrated imagery, rudimentary color reproduction is often added as a post-processing step rather than integrated into tone reproduction algorithms. In the general case, this currently requires manual parameter tuning, and can be automated only for some global tone reproduction operators by inferring parameters from the tone curve. We present a novel and fully automatic saturation correction technique, suitable for any tone reproduction operator (including inverse tone reproduction), which exhibits fewer distortions in hue and luminance reproduction than the current state-of-the-art. We validated its comparative effectiveness through subjective experiments and objective metrics. Our experiments confirm that saturation correction significantly contributes toward the perceptually plausible color reproduction of tonemapped content and would, therefore, be useful in any color-critical application.\nlink to the paper","tags":null,"title":"Automatic saturation correction for dynamic range management algorithms","type":"publication"},{"authors":["Marco Potenziani","Marco Callieri","Roberto Scopigno"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"31b18aa5ab75f567b6ed7d1d99809c6e","permalink":"http://vcg.isti.cnr.it/publication/2018/PCS18a/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PCS18a/","section":"publication","summary":"3DHOP (3D Heritage On-line Presenter) has been released 4 years ago, as an open-source framework for the creation of interactive visualization of 3D content on the web, aimed at the CH field. Transforming a research tool into a software \"product\" usable by the heterogeneous CH community is not a simple task and requires a significant amount of resources plus a specific design. This work presents the evolution of the 3DHOP system, and the complex relationship with its community of users, made of content creators, CH experts and general public. We will discuss the new features introduced, as well as the design and implementation strategy employed to maintain the software and make it usable by developers. We will evaluate the effectiveness of the platform by illustrating some of the applications built with 3DHOP either internally or by external users, as well as by presenting the results of a survey aimed at gathering the opinions and suggestions of the user community.","tags":null,"title":"Developing and Maintaining a Web 3D Viewer for the CH Community: an Evaluation of the 3DHOP Framework","type":"publication"},{"authors":["Werner Schweibenz","Roberto Scopigno"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"ccdc2df4836212b5ee3754e0e330eae9","permalink":"http://vcg.isti.cnr.it/publication/2018/SS18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/SS18/","section":"publication","summary":"","tags":null,"title":"Documenting past exhibitions. Why and how information technology could help to preserve dismantled shows","type":"publication"},{"authors":["Gianpaolo Palma","Manuele Sabbadin","Massimiliano Corsini","Paolo Cignoni"],"categories":null,"content":" ","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"875bda46bf3587e190facd7087cf7d01","permalink":"http://vcg.isti.cnr.it/publication/2018/PSCC18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PSCC18/","section":"publication","summary":"The wide availability of 3D acquisition devices makes viable their use for shape monitoring. The current techniques for the analysis of time-varying data can efficiently detect actual significant geometric changes and rule out differences due to irrelevant variations (like sampling, lighting, coverage). On the other hand, the effective visualization of such detected changes can be challenging when we want to show at the same time the original appearance of the 3D model. In this paper, we propose a dynamic technique for the effective visualization of detected differences between two 3D scenes. The presented approach, while retaining the original appearance, allows the user to switch between the two models in a way that enhances the geometric differences that have been detected as significant. Additionally, the same technique is able to visually hides the other negligible, yet visible, variations. The main idea is to use two distinct screen space time-based interpolation functions for the significant 3D differences and for the small variations to hide. We have validated the proposed approach in a user study on a different class of datasets, proving the objective and subjective effectiveness of the method. \t\tInteractive Web Application","tags":null,"title":"Enhanced Visualization of Detected 3D Geometric Differences","type":"publication"},{"authors":["Filippo A. Fanni","Gianmarco Cherchi","Alessandro Muntoni","Alessandro Tola","Riccardo Scateni"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"e8a8f225d6f6ced90cbad0395d3220b1","permalink":"http://vcg.isti.cnr.it/publication/2018/FCMTS18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/FCMTS18/","section":"publication","summary":"","tags":null,"title":"Fabrication Oriented Shape Decomposition using Polycube Mapping","type":"publication"},{"authors":["Wei Fan","Giuseppe Valenzise","Francesco Banterle","Frederic Dufaux"],"categories":null,"content":"Link\n","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"bdcba3ccca373b3377d1279f73f5b40a","permalink":"http://vcg.isti.cnr.it/publication/2018/FVBD18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/FVBD18/","section":"publication","summary":"Abstract High dynamic range (HDR) imaging enables to capture the full range of physical luminance of a real-world scene, and is expected to progressively replace traditional low dynamic range (LDR) pictures and videos. Despite the increasing HDR popularity, very little attention has been devoted to new forensic problems that are characteristic to this content. In this paper, we address for the first time such kind of problem, by identifying the source of an HDR picture. Specifically, we consider the two currently most common techniques to generate an HDR image: by fusing multiple LDR images with different exposure time, or by inverse tone mapping an LDR picture. We show that, in order to apply conventional forensic tools to HDR images, they need to be properly preprocessed, and we propose and evaluate a few simple HDR forensic preprocessing strategies for this purpose. In addition, we propose a new forensic feature based on Fisher scores, calculated under Gaussian mixture models. We show that the proposed feature outperforms the popular SPAM features in classifying the HDR image source on image blocks as small as 3x3, which makes our method suitable to detect composite forgeries combining HDR patches originating from different acquisition processes. Link to the official publication.","tags":null,"title":"Fine-grained detection of inverse tone mapping in HDR images","type":"publication"},{"authors":["Luigi Malomo","Jesús Pérez","Emmanuel Iarussi","Nico Pietroni","Eder Miguel","Paolo Cignoni","Bernd Bickel"],"categories":null,"content":" ","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"215eca79706cb031c19b9ce20a3b3709","permalink":"http://vcg.isti.cnr.it/publication/2018/MPIPMCB18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/MPIPMCB18/","section":"publication","summary":"Abstract We propose FlexMaps, a novel framework for fabricating smooth shapes out of flat, flexible panels with tailored mechanical properties. We start by mapping the 3D surface onto a 2D domain as in traditional UV mapping to design a set of deformable flat panels called FlexMaps. For these panels, we design and obtain specific mechanical properties such that, once they are assembled, the static equilibrium configuration matches the desired 3D shape. FlexMaps can be fabricated from an almost rigid material, such as wood or plastic, and are made flexible in a controlled way by using computationally designed spiraling microstructures.","tags":null,"title":"FlexMaps: Computational Design of Flat Flexible Shells for Shaping 3D Objects","type":"publication"},{"authors":["Thomas Alderighi","Luigi Malomo","Daniela Giorgi","Nico Pietroni","Bernd Bickel","Paolo Cignoni"],"categories":null,"content":" Slides ","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"09b7346c10156ecd6a5bae5a77d933f8","permalink":"http://vcg.isti.cnr.it/publication/2018/AMGPBC18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/AMGPBC18/","section":"publication","summary":"We propose a new method for fabricating digital objects through reusable silicone molds. Molds are generated by casting liquid silicone into custom 3D printed containers called metamolds. Metamolds automatically define the cuts that are needed to extract the cast object from the silicone mold. The shape of metamolds is designed through a novel segmentation technique, which takes into account both geometric and topological constraints involved in the process of mold casting. Our technique is simple, does not require changing the shape or topology of the input objects, and only requires of-the-shelf materials and technologies. We successfully tested our method on a set of challenging examples with complex shapes and rich geometric detail. \t \t\t \t\t \t Slides","tags":null,"title":"Metamolds: computational design of silicone molds","type":"publication"},{"authors":["Marco Potenziani","Marco Callieri","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"4b35e6708dadfe43285e668e79081390","permalink":"http://vcg.isti.cnr.it/publication/2018/PCDS18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PCDS18/","section":"publication","summary":"Three-dimensional content is becoming an important component of the World Wide Web environment. From the advent of WebGL to the present, a wide number of solutions have been developed (including libraries, middleware, and applications), encouraging the establishment of 3D data as online media of practical use. The fast development of 3D technologies and related web-based resources makes it difficult to identify and properly understand the current trends and open issues. Starting from these premises, this survey analyzes the state of the art of 3D web publishing, reviews the possibilities provided by the major current approaches, proposes a categorization of the features supported by existing solutions, and cross-maps these with the requirements of a few main application domains. The results of this analysis should help in defining the technical characteristics needed to build efficient and effective 3D data presentation, taking into account the application contexts.","tags":null,"title":"Publishing and Consuming 3D Content on the Web, A Survey","type":"publication"},{"authors":["Carlo Cerrano","Matteo Dellepiane","Marco Callieri","Marco Palma","Gaia Pavoni","Ubaldo Pantaleo","Roberto Scopigno"],"categories":null,"content":" ","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"0ef5ae7aee1e4841fa5fe6109e651261","permalink":"http://vcg.isti.cnr.it/publication/2018/PPCDCPS18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PPCDCPS18/","section":"publication","summary":" ","tags":null,"title":"Quasi-Orthorectified Projection for the Measurement of Red Gorgonian Colonies","type":"publication"},{"authors":["Fabio Ganovelli","Luigi Malomo","Roberto Scopigno"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"3f425ed4621b1164b0acd1b72b33e93a","permalink":"http://vcg.isti.cnr.it/publication/2018/GMS18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/GMS18/","section":"publication","summary":"Abstract We present a novel method for 3D reconstruction of overhead power lines from a few images. The solution to this problem has a deep impact over the strategies adopted to monitor the many thousand kilometres of powerlines innervating our countries;currently, the only effective solution is based on the use of high-end laser scanners mounted on drones. The difficulty with image-based 3D reconstruction algorithms is that images of wires of the power lines typically do not have point features to match among different images. We leverage on a few assumptions that can be made on the power lines case and define an ad-hoc strategy for solving the problem. We first use a Structure from Motion algorithm to retrieve the approximate camera poses and then formulate a minimization problem to simultaneously define a 3D wire hypothesis and refine the camera poses so that the projections of that wire are consistent on the supporting images.","tags":null,"title":"Reconstructing Power Lines from Images","type":"publication"},{"authors":["Giovanni Pintore","Ruggero Pintus","Fabio Ganovelli","Roberto Scopigno","Enrico Gobbetti"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"d8bcac98a91178560e815c3da5f9cbfc","permalink":"http://vcg.isti.cnr.it/publication/2018/PPGSG18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PPGSG18/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstract We present a vision-based approach to automatically recover the 3D \\emph{existing-conditions} information of an indoor structure, starting from a small set of overlapping spherical images. The recovered 3D model includes the \\emph{as-built} 3D room layout with the position of important functional elements located on room boundaries. We first recover the underlying 3D structure as interconnected rooms bounded by walls. This is done by combining geometric reasoning under an Augmented Manhattan World model and Structure-from-Motion. Then, we create, from the original registered spherical images, 2D rectified and metrically scaled images of the room boundaries. Using those undistorted images and the associated 3D data, we automatically detect the 3D position and shape of relevant wall-, floor-, and ceiling-mounted objects, such as electric outlets, light switches, air-vents and light points. As a result, our system is able to quickly and automatically draft an as-built model coupled with its existing conditions using only commodity mobile devices. We demonstrate the effectiveness and performance of our approach on real-world indoor scenes and publicly available datasets.","tags":null,"title":"Recovering 3D existing-conditions of indoor structures from spherical images","type":"publication"},{"authors":["Giovanni Pintore","Fabio Ganovelli","Ruggero Pintus","Roberto Scopigno","Enrico Gobbetti"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"45d529a0a30f7c057af73932d6eb1936","permalink":"http://vcg.isti.cnr.it/publication/2018/PGPSG18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PGPSG18/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstract We present a vision-based approach to automatically recover the 3D \\emph{existing-conditions} information of an indoor structure, starting from a small set of overlapping spherical images. The recovered 3D model includes the \\emph{as-built} 3D room layout with the position of important functional elements located on room boundaries. We first recover the underlying 3D structure as interconnected rooms bounded by walls. This is done by combining geometric reasoning under an Augmented Manhattan World model and Structure-from-Motion. Then, we create, from the original registered spherical images, 2D rectified and metrically scaled images of the room boundaries. Using those undistorted images and the associated 3D data, we automatically detect the 3D position and shape of relevant wall-, floor-, and ceiling-mounted objects, such as electric outlets, light switches, air-vents and light points. As a result, our system is able to quickly and automatically draft an as-built model coupled with its existing conditions using only commodity mobile devices. We demonstrate the effectiveness and performance of our approach on real-world indoor scenes and publicly available datasets.","tags":null,"title":"Recovering 3D indoor floorplans by exploiting low-cost 360 photography","type":"publication"},{"authors":["Gianpaolo Palma","Tamy Boubekeur","Fabio Ganovelli","Paolo Cignoni"],"categories":null,"content":" ","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"bec86953c93ead84f1680a00268b4bed","permalink":"http://vcg.isti.cnr.it/publication/2018/PBGC18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PBGC18/","section":"publication","summary":"We propose a new non-rigid registration method for large 3D meshes from Multi-View Stereo (MVS) reconstruction characterized by low-frequency shape deformations induced by several factors, such as low sensor quality and irregular sampling object coverage. Starting from a reference model to which we want to align a new 3D mesh, our method starts by decomposing it in patches using a Lloyd clustering before running an ICP local registration for each patch. Then, we improve the alignment using few geometric constraints and finally, we build a global deformation function that blends the estimated per-patch transformations. This function is structured on top of a deformation graph derived from the dual graph of the clustering. Our algorithm is iterated until convergence, increasing progressively the number of patches in the clustering to capture smaller deformations. The method comes with a scalable multicore implementation that enables, for the first time, the alignment of meshes made of tens of millions of triangles in a few minutes. We report extensive experiments of our algorithm on several dense Multi-View Stereo models, using a 3D scan or another MVS reconstruction as reference. Beyond MVS data, we also applied our algorithm to different scenarios, exhibiting more complex and larger deformations, such as 3D motion capture dataset or 3D scans of dynamic objects. The good alignment results obtained for both datasets highlights the efficiency and the flexibility of our approach.","tags":null,"title":"Scalable non-rigid registration for multi-view stereo data","type":"publication"},{"authors":["Daniela Pica","Gaia Pavoni","Ubaldo Pantaleo","Monica Rivas Casado","Marco Palma","Carlo Cerrano"],"categories":null,"content":" ","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"5e99352cea835a209ca93389f2853275","permalink":"http://vcg.isti.cnr.it/publication/2018/PRPPPC18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PRPPPC18/","section":"publication","summary":" ","tags":null,"title":"SfM-Based Method to Assess Gorgonian Forests (Paramuricea clavata (Cnidaria, Octocorallia))","type":"publication"},{"authors":["Alessandro Muntoni","Andreas Scalas","Stefano Nuvoli","Riccardo Scateni"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"3acc7b530c089e5857405a228ec8729b","permalink":"http://vcg.isti.cnr.it/publication/2018/MSNS18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/MSNS18/","section":"publication","summary":"","tags":null,"title":"Simplification of Shapes for Fabrication with V-Groove Milling Tools","type":"publication"},{"authors":["Patrick Seemann","Gianpaolo Palma","Matteo Dellepiane","Paolo Cignoni","Michael Goesele"],"categories":null,"content":" ","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"80544a401b9a8ada1c3214469dd2c7d0","permalink":"http://vcg.isti.cnr.it/publication/2018/SPDCG18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/SPDCG18/","section":"publication","summary":"We propose a novel rendering framework for visualizing point data with complex structures and/or different quality of data. The point cloud can be characterized by setting a per-point scalar field associated to the aspect that differentiates the parts of the dataset (i.e. uncertainty given by local normal variation). Our rendering method uses the scalar field to render points as solid splats or semi-transparent spheres with non-uniform density to produce the final image. To that end, we derive a base model for integrating density in (intersecting) spheres for both the uniform and non-uniform setting and introduce a simple and fast approximation which yields interactive rendering speeds for millions of points. Because our method only relies on the basic OpenGL rasterization pipeline, rendering properties can be adjusted in real-time by user. The method has been tested on several datasets with different characteristics, and user studies show that a clearer understanding of the scene is possible in comparison with point splatting techniques and basic transparency rendering.","tags":null,"title":"Soft Transparency for Point Cloud Rendering","type":"publication"},{"authors":["Bernd Bickel","Paolo Cignoni","Luigi Malomo","Nico Pietroni"],"categories":null,"content":" ","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"4daea7684bd7418d4dce382eda451007","permalink":"http://vcg.isti.cnr.it/publication/2018/BCMP18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/BCMP18/","section":"publication","summary":"Digital fabrication devices are powerful tools for creating tangible reproductions of 3D digital models. Most available printing technologies aim at producing an accurate copy of a tridimensional shape. However, fabrication technologies can also be used to create a stylistic representation of a digital shape. We refer to this class of methods as \"stylized fabrication methods.\" These methods abstract geometric and physical features of a given shape to create an unconventional representation, to produce an optical illusion, or to devise a particular interaction with the fabricated model. In this state-of-the-art report, we classify and overview this broad and emerging class of approaches and also propose possible directions for future research. DOI: 10.1111/cgf.13327","tags":null,"title":"State of the Art on Stylized Fabrication","type":"publication"},{"authors":["Akrivi Katifori","Maria Roussou","Sara Perry","Paolo Cignoni","Luigi Malomo","Gianpaolo Palma","George Drettakis","Sebastien Vizcay"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"c4259b83b8c31e247a746e8777868ed5","permalink":"http://vcg.isti.cnr.it/publication/2018/-RPCMPDV18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/-RPCMPDV18/","section":"publication","summary":"","tags":null,"title":"The EMOTIVE Project - Emotive virtual cultural experiences through personalized storytelling","type":"publication"},{"authors":["Eliana Siotto"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"e6eb6e744b8dd1d5ab884f958031ca34","permalink":"http://vcg.isti.cnr.it/publication/2018/Sio18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/Sio18/","section":"publication","summary":"","tags":null,"title":"The use of colour in Roman marble sarcophagi","type":"publication"},{"authors":["Marco Callieri","Roberto Scopigno","Matteo Dellepiane"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"c40136742466594ff270a8e9de561969","permalink":"http://vcg.isti.cnr.it/publication/2018/CSD18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/CSD18/","section":"publication","summary":"","tags":null,"title":"Using Digital 3D Technology for Documenting and Studying the Griffin","type":"publication"},{"authors":["Federico Ponchio","Marion Lamé","Roberto Scopigno","Bruce Robertson"],"categories":null,"content":" ","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"9f22ea229c7a7d1df39e6ab64bf3b814","permalink":"http://vcg.isti.cnr.it/publication/2018/PLSR18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PLSR18/","section":"publication","summary":" ","tags":null,"title":"Visualizing and Transcribing Complex Writings through RTI","type":"publication"},{"authors":["Fabrizio Ivan Apollonio","Vilma Basilissi","Marco Callieri","Matteo Dellepiane","Marco Gaiani","Federico Ponchio","Francesca Rizzo","Angelo Rubino","Roberto Scopigno","Giorgio Sobrà"],"categories":null,"content":" ","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"18adaeecf6f450dd6fab960f908e1b44","permalink":"http://vcg.isti.cnr.it/publication/2017/ABCDGPRRSS17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/ABCDGPRRSS17/","section":"publication","summary":" ","tags":null,"title":"A 3D-centered information system for the documentation of a complex restoration intervention","type":"publication"},{"authors":["Francesco Banterle","Alessandro Artusi","Kurt Debattista","Alan Chalmers"],"categories":null,"content":"link to the official website\nlink to the HDR Toolbox git repository\n","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"456a28f830ea2f7a84bf8ed698db14ab","permalink":"http://vcg.isti.cnr.it/publication/2017/BADC17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/BADC17/","section":"publication","summary":"abstract\n\n\n\n\n\nlink to the official website\n\nlink to the HDR Toolbox git repository\n\n\nTable of Contents This book is a practical introduction to the field of High Dynamic Range imaging that combines photography, computer vision, and computer graphics. The second edition focuses on HDR video content that is increasing its importance given the introduction in the market of affordable HDR televisions. Furthermore, we have revised and expanded previous content.\nAs in the first edition, the book provides detailed equations and Matlab code. This allows the reader to have the tools for experimenting with HDR Imaging for producing compelling images.\n\n\nThe book is divided in the following chapters:\nIntroduction (a brief introduction on light, human vision, and color spaces);\nHDR Content Generation;\nTone Mapping;\nNew Trend in Tone Mapping;\nHDR Video Tone Mapping;\nExpansion Operators for Low Dynamic Range Content;\nImage-Based Lighting;\nHDR Image Compression;\nHDR Video Compression;\nEvaluation.\n\n\nThe book provides three appendecies on the bilateral filter, color spaces, and how to use the HDR Toolbox for Matlab.","tags":null,"title":"Advanced High Dynamic Range Imaging","type":"publication"},{"authors":["Carlo Meghini","Roberto Scopigno","Julian Richards"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"be407f85587c536ac6dd255eef9b1f4f","permalink":"http://vcg.isti.cnr.it/publication/2017/MSR17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/MSR17/","section":"publication","summary":"","tags":null,"title":"ARIADNE: A Research Infrastructure for Archaeology","type":"publication"},{"authors":["Daniel Coutinho","Ricardo Marroquim","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"b8e67abc43f2b0786696edc8a9dbac5d","permalink":"http://vcg.isti.cnr.it/publication/2017/CMDS17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/CMDS17/","section":"publication","summary":"","tags":null,"title":"Assisted color acquisition for 3D models","type":"publication"},{"authors":["Roi Poranne","Marco Tarini","Sandro Huber","Daniele Panozzo","Olga Sorkine-Hornung"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"631edbd65ef4530b448f45df9ce9fb80","permalink":"http://vcg.isti.cnr.it/publication/2017/PTHPS17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/PTHPS17/","section":"publication","summary":"","tags":null,"title":"Autocuts: Simultaneous Distortion and Cut Optimization for UV Mapping","type":"publication"},{"authors":["Alessandro Vecchione","Marco Callieri"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"7ad2c2506ff7de5433514bcd5d0ac5dc","permalink":"http://vcg.isti.cnr.it/publication/2017/VC17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/VC17/","section":"publication","summary":"","tags":null,"title":"Claudian Aqueduct in Rome, from the 3D survey to the virtual reconstruction according to archaeological records","type":"publication"},{"authors":["Roberto Scopigno","Marco Callieri"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"40c0890b63450ec6ca41d31e966aabe4","permalink":"http://vcg.isti.cnr.it/publication/2017/CS17a/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/CS17a/","section":"publication","summary":"","tags":null,"title":"Dalla digitalizzazione alla riproduzione 3D, per lo studio e la presentazione di un’opera di arte moderna","type":"publication"},{"authors":["Roberto Scopigno","Marco Callieri","Matteo Dellepiane","Federico Ponchio","Marco Potenziani"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"511f63200eceac40b0a817dbe41df9b3","permalink":"http://vcg.isti.cnr.it/publication/2017/SCDPP17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/SCDPP17/","section":"publication","summary":"","tags":null,"title":"Delivering and using 3D models on the web: are we ready? ","type":"publication"},{"authors":["Eliana Siotto","Gianpaolo Palma","Roberto Scopigno"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"1065ffa14205dfacf2d04b0c69cc185b","permalink":"http://vcg.isti.cnr.it/publication/2017/SPS17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/SPS17/","section":"publication","summary":"","tags":null,"title":"Development of the interactive system digital Loggia","type":"publication"},{"authors":["Marco Callieri","Nico Pietroni","Paolo Cignoni","Roberto Scopigno","Matteo Dellepiane"],"categories":null,"content":" ","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"5a97908ff51d633fdf1d66b61481fef8","permalink":"http://vcg.isti.cnr.it/publication/2017/SCPCD17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/SCPCD17/","section":"publication","summary":"Digital fabrication devices exploit basic technologies in order to create tangible reproductions of 3D digital models. Although current 3D printing pipelines still suffer from several restrictions, accuracy in reproduction has reached an excellent level. The manufacturing industry has been the main domain of 3D printing applications over the last decade. Digital fabrication techniques have also been demonstrated to be effective in many other contexts, including the consumer domain. The Cultural Heritage is one of the new application contexts and is an ideal domain to test the flexibility and quality of this new technology. This survey overviews the various fabrication technologies, discussing their strengths, limitations, and costs. Various successful uses of 3D printing in the Cultural Heritage are analysed, which should also be useful for other application contexts. We review works that have attempted to extend fabrication technologies in order to deal with the specific issues in the use of digital fabrication in the Cultural Heritage. Finally, we also propose areas for future research.","tags":null,"title":"Digital Fabrication Techniques for Cultural Heritage: A Survey","type":"publication"},{"authors":["Paolo Pingi","Eliana Siotto","Gianpaolo Palma","Roberto Scopigno"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"ca69517433a7d1aa33dc190a9dbb71c8","permalink":"http://vcg.isti.cnr.it/publication/2017/PSPS17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/PSPS17/","section":"publication","summary":"","tags":null,"title":"Documentazione e analisi delle deformazioni del supporto ligneo e della superficie pittorica mediante rilievo 3D","type":"publication"},{"authors":["Nico Schertler","Marco Tarini","Wenzel Jakob","Misha Kazhdan","Stefan Gumhold","Daniele Panozzo"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"9ed10398a4f29174d9fe33fa98e0d93a","permalink":"http://vcg.isti.cnr.it/publication/2017/STJKGP17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/STJKGP17/","section":"publication","summary":"","tags":null,"title":"Field-aligned online surface reconstruction","type":"publication"},{"authors":["Matteo Dellepiane","Marco Callieri","Francesco Banterle","Domenico Arenga","Massimo Zallocco","Roberto Scopigno"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"78aff160c0f052150b059604624c1b40","permalink":"http://vcg.isti.cnr.it/publication/2017/DCBAZS17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/DCBAZS17/","section":"publication","summary":"","tags":null,"title":"From Paper to Web: Automatic Generation of a Web-Accessible 3D Repository of Pottery Types","type":"publication"},{"authors":["Roberto Scopigno","Matteo Dellepiane"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"7e2850c7c15d2cbb2701bf3b74ef09eb","permalink":"http://vcg.isti.cnr.it/publication/2017/SD17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/SD17/","section":"publication","summary":"","tags":null,"title":"Integration and Analysis of Sampled Data: Visualization Approaches and Platforms","type":"publication"},{"authors":["Eliana Siotto"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"7fdfb2ef51d52adf5183e930b14afa7d","permalink":"http://vcg.isti.cnr.it/publication/2017/Sio17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/Sio17/","section":"publication","summary":"","tags":null,"title":"La policromia sui sarcofagi romani. Catalogo e risultati scientifici","type":"publication"},{"authors":["Giovanni Pintore","Fabio Ganovelli","Roberto Scopigno","Enrico Gobbetti"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"c0b03098b9206071d5c701cb7594c43b","permalink":"http://vcg.isti.cnr.it/publication/2017/PGSG17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/PGSG17/","section":"publication","summary":"","tags":null,"title":"Mobile metric capture and reconstruction in indoor environments","type":"publication"},{"authors":["Nico Pietroni","Marco Tarini","Amir Vaxman","Daniele Panozzo","Paolo Cignoni"],"categories":null,"content":" here\nhere\n","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"cc0f1a6e88b6c6ac86318ac0d0f10f6b","permalink":"http://vcg.isti.cnr.it/publication/2017/PTVPC17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/PTVPC17/","section":"publication","summary":"We propose a novel framework for the computational design of tensegrity structures, which are constructions made of struts and cables, held rigid by continuous tension between the elements. Tensegrities are known to be difficult to design---existing design methods are often restricted to using symmetric or templated configurations, limiting the design space to simple constructions. We introduce an algorithm to automatically create free-form stable tensegrity designs that satisfy both fabrication and geometric constraints, and faithfully approximate input geometric shapes. Our approach sidesteps the usual force-based approach in favor of a geometric optimization on the positions of the elements. Equipped with this formulation, we provide a design framework to explore the highly constrained space of tensegrity structures. We validate our method with simulations and real-world constructions. Click here download the slides. Click here download the data.","tags":null,"title":"Position-Based Tensegrity Design","type":"publication"},{"authors":["Cem Yuksel","Marco Tarini","Silvain Lefebvre"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"f57c9c589be93f21a4a582bc0c0daaa5","permalink":"http://vcg.isti.cnr.it/publication/2017/TYL17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/TYL17/","section":"publication","summary":"","tags":null,"title":"Rethinking texture mapping","type":"publication"},{"authors":["Xifeng Gao","Marco Tarini","Wenzel Jakob","Daniele Panozzo"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"73194cc5ec8a7fbe9e42033b037777f4","permalink":"http://vcg.isti.cnr.it/publication/2017/GTJP17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/GTJP17/","section":"publication","summary":"","tags":null,"title":"Robust hex-dominant mesh generation using field-guided polyhedral agglomeration","type":"publication"},{"authors":["Baptiste Angles","Marco Tarini","Brian Wyvill","Loic Barthe","Andrea Tagliasacchi"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"488c991641d65e4ccddc653a562acb14","permalink":"http://vcg.isti.cnr.it/publication/2017/ATWBT17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/ATWBT17/","section":"publication","summary":"","tags":null,"title":"Sketch-Based Implicit Blending","type":"publication"},{"authors":["Ruggero Pintus","Enrico Gobbetti","Marco Callieri","Matteo Dellepiane"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"996966027426ffef7f79ec52477df4ad","permalink":"http://vcg.isti.cnr.it/publication/2017/PGCD17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/PGCD17/","section":"publication","summary":"","tags":null,"title":"Techniques for Seamless Color Registration and Mapping on Dense 3D Models","type":"publication"},{"authors":["Gabriele Gattiglia","Tim Evans","Matteo Dellepiane","Francesco Banterle","Barak Itkin","Massimo Zallocco"],"categories":null,"content":" ","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"7fb2b0535e9c034b80e3b51f7a640e50","permalink":"http://vcg.isti.cnr.it/publication/2017/BDEGIZ17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/BDEGIZ17/","section":"publication","summary":" ","tags":null,"title":"The ArchAIDE Project: Results and Perspectives After the First Year","type":"publication"},{"authors":["Francesco Banterle","Barak Itkin","Matteo Dellepiane","Lior Wolf","Marco Callieri","Nachum Dershowitz","Roberto Scopigno"],"categories":null,"content":"source code\n","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"23269f0af5446b63302c6c6103638d68","permalink":"http://vcg.isti.cnr.it/publication/2017/BIDWCDS17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/BIDWCDS17/","section":"publication","summary":"abstract\n\n\n\nAbstract We describe an automated pipeline for digitization of catolog drawings of pottery types. This work is aimed at extracting a structured description of the main geometric features and a 3D representation of each class. The pipeline includes methods for understanding a 2D drawing and using it for constructing a 3D model of the pottery. These will be used to populate a reference database for classification of potsherds. Furthermore, we extend the pipeline with methods for breaking the 3D model to obtain synthetic sherds and methods for capturing images of these sherds in a way that matches the imaging methodology of archaeologists. These will serve to build a massive set of synthetic sherd images that will help train and test future automated classification systems.\nsource code","tags":null,"title":"VASESKETCH: Automatic 3D Representation of Pottery from Paper Catolog Drawings","type":"publication"},{"authors":["Fabio Menna","Erika Nocerino","Fabio Remondino","Matteo Dellepiane","Marco Callieri","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"3e20b04696a0b318a96d81cd07c524e1","permalink":"http://vcg.isti.cnr.it/publication/2016/MNRDCS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/MNRDCS16/","section":"publication","summary":"","tags":null,"title":"3D Digitization of an Heritage Masterpiece - a Critical Analysis on Quality Assessment","type":"publication"},{"authors":["Elena Sikudova","Tania Pouli","Alessandro Artusi","Ahmet Oguz Akyuz","Francesco Banterle","Erik Reinhard","Zeynep Mazlumoglu"],"categories":null,"content":"Link\n","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"45ee1723068ef7928541b5cd93d8bcb1","permalink":"http://vcg.isti.cnr.it/publication/2016/SPAABRM16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/SPAABRM16/","section":"publication","summary":"Abstract An integrated gamut- and tone-management framework for color-accurate reproduction of high dynamic range images can prevent hue and luminance shifts while taking gamut boundaries into consideration. The proposed approach is conceptually and computationally simple, parameter-free, and compatible with existing tone-mapping operators. Link to the official publication.","tags":null,"title":"A Gamut Mapping Framework for Color-Accurate Reproduction of HDR Images","type":"publication"},{"authors":["Antonina Canzoneri","Gaia Pavoni","Marco Callieri","Matteo Dellepiane","Paolo Pingi","Manuela De Giorgi","Roberto Scopigno"],"categories":null,"content":" ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"f495e1b336184a95269aa22868edda66","permalink":"http://vcg.isti.cnr.it/publication/2016/CPCDPDS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/CPCDPDS16/","section":"publication","summary":" ","tags":null,"title":"A Virtual Experience Across the Buried History","type":"publication"},{"authors":["Dario Magri","Paolo Cignoni","Marco Tarini"],"categories":null,"content":" ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"a3f9daf6a891ae30ae90fb3b32a798c5","permalink":"http://vcg.isti.cnr.it/publication/2016/MCT16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/MCT16/","section":"publication","summary":" ","tags":null,"title":"Anisotropic MatCap: Easy Capture and Reproduction of Anisotropic Materials","type":"publication"},{"authors":["Maria Letizia Gualandi","Roberto Scopigno","Lior Wolf","Julian Richards","Jaume Buxeda i Garrigos","Michael Heinzelmann","Miguel Angel Hervas","Massimo Zallocco"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"b88f7140b45eef04795f9abfc8313d5f","permalink":"http://vcg.isti.cnr.it/publication/2016/GSWRBHHZ16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/GSWRBHHZ16/","section":"publication","summary":"","tags":null,"title":"ArchAIDE - Archaeological Automatic Interpretation and Documentation of cEramics","type":"publication"},{"authors":["Federico Ponchio","Marco Potenziani","Matteo Dellepiane","Marco Callieri","Roberto Scopigno"],"categories":null,"content":" ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"427e4fe37460af7c57415091f70e0e46","permalink":"http://vcg.isti.cnr.it/publication/2016/PPDCS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/PPDCS16/","section":"publication","summary":" ","tags":null,"title":"ARIADNE Visual Media Service: Easy Web Publishing of Advanced Visual Media","type":"publication"},{"authors":["Alexandre Ahmad","Olivier Balet","Arjen Boin","Julien Castet","Fabio Ganovelli","George Kokkinis","Giovanni Pintore"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"3ea2baa357af43b7e890ad5934db6102","permalink":"http://vcg.isti.cnr.it/publication/2016/ABBCGKP16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/ABBCGKP16/","section":"publication","summary":"This paper presents an innovative IT solution, a virtual studio, enabling security professionals to formulate, test and adjust security measures to enhance the security of critical buildings. The concept is to virtualize the environment, enabling experts to examine and assess and improve on a building's security in a cost-effective and risk-free way. Our virtual studio solution makes use of the latest advances in computer graphics to reconstruct accurate blueprints as well as 3D representations of entire buildings in a very short timeframe. In addition, our solution enables the creation and simulation of multiple threat situations, allowing users to assess security procedures and various responses. Furthermore, we present a novel device, tailored to support collaborative security planning needs. Security experts from various disciplines evaluated our virtual studio solution, and their analysis is presented in this paper.","tags":null,"title":"Assessing the Security of Buildings: A Virtual Studio Solution","type":"publication"},{"authors":["Gaia Pavoni","Matteo Dellepiane","Marco Callieri","Roberto Scopigno"],"categories":null,"content":" ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"2b99d02e282f2bc0676bf41029d65ca5","permalink":"http://vcg.isti.cnr.it/publication/2016/PDCS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/PDCS16/","section":"publication","summary":" ","tags":null,"title":"Automatic Selection of Video Frames for Path Regularization and 3D Reconstruction","type":"publication"},{"authors":["Marco Potenziani","Bernhard Fritsch","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"e677b3f5fc4e6f1f284f00d1cb017b6d","permalink":"http://vcg.isti.cnr.it/publication/2016/PFDS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/PFDS16/","section":"publication","summary":"Online publishing of almost every type of 3D data has become a quasi-standard routine. Nevertheless, the integration in a \tweb page of a single 3D model, or of a predefined restricted set of models, raises different issues compared to an efficient and \teffective integration of thousands of them in an online repository. In this case it is mandatory to have an automatized pipeline to \tprepare and homogenize the dataset. The pipeline should be able to automatically wrap 3D data in all conditions, and display \tevery single model with the best scene setup without any (or with a minimal) interaction by the database maintainers. \tThis paper, retracing the steps of a recent real application case, aims at showing all the faced issues (and the adopted solutions) \tto publish a large and heterogeneous three-dimensional dataset in a web specialized repository. We want to introduce a valid \tand reusable strategy, starting from the description of the pipeline adopted for data pre-processing and moving to the choices \tmade in the 3D viewer implementation. The paper concludes with a discussion on the actual state of the integration of 3D data \twith the other multimedia informative layers.","tags":null,"title":"Automating Large 3D Dataset Publication in a Web-Based Multimedia Repository","type":"publication"},{"authors":["Elena Corio","Francesco Laccone","Nico Pietroni","Paolo Cignoni","Maurizio Froli"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"5d9808da9f5aa02e2e435c2205418592","permalink":"http://vcg.isti.cnr.it/publication/2016/CLPCF16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/CLPCF16/","section":"publication","summary":"Reciprocal structures, or nexorade, are composed by the assembling of groups of three or more beams mutually connected by mono-lateral T joints in a way that any relative movement is suppressed. This kind of structures can be easily built in relatively unprepared sites, dismantled, transported and re-used even by not specialized handcraft. For these reasons, reciprocal structures have been widely used in the past for military purposes, and nowadays they seem to satisfy very well the different requirements of a quick and temporary shelter of a large archaeological area when they are shaped as grid shells. This paper proposes the design of a reversible, reciprocal framed grid shell to shelter the archaeological site of the Roman Shipwrecks in Pisa. The structure must protect excavations and archaeologists from the weather and provide an easy access to visitors. Additionally, it must allow for easy disassembling and moving to another site. The design choices aim at optimizing both structural efficiency and esthetical qualities. A parametric workflow for both the form finding and the digital fabrication processes has been developed, and a prototype of accommodative steel T-joint for timber reciprocal beams has been realized. Finally, a model using CNC- cutting tested the structural feasibility of such a design approach.","tags":null,"title":"Conception and parametric design workflow for a timber large-spanned reversible grid shell to shelter the archaeological site of the Roman Shipwrecks in Pisa","type":"publication"},{"authors":["Gabriele Salvati","Claudio Calabrese","Marco Tarini","Fabio Pellacini"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"f3efd0be7e232fb59fdfbf07b4f50e3a","permalink":"http://vcg.isti.cnr.it/publication/2016/CSTP16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/CSTP16/","section":"publication","summary":"Collaborative systems are well established solutions for sharing work among people. In computer graphics these workflows are still not well established, compared to what is done for text writing or software development. Usually artists work alone and share their final models by sending files. In this paper we present a system for collaborative 3D digital sculpting. In our prototype, multiple artists concurrently sculpt a polygonal mesh on their local machines by changing its vertex properties, such as positions and material BRDFs. Our system shares the artists' edits automatically and seamlessly merges these edits even when they happen on the same region of the surface. We propose a merge algorithm that is fast-enough for seamless collaboration, respects users' edits as much as possible, can support any sculpting operation, and works for both geometry and appearance modifications. Since in sculpting artists alternatively perform fine adjustments and large scale modifications, our algorithm is based on a multiresolution edit representation that handles concurrent overlapping edits at different scales. We tested our algorithm by modeling meshes collaboratively in different sculpting sessions and found that our algorithm outperforms prior works on collaborative mesh editing in all cases.","tags":null,"title":"cSculpt: A System for Collaborative Sculpting","type":"publication"},{"authors":["Davide Tonelli","Nico Pietroni","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"9a5af345861e3019ddf100a509a62186","permalink":"http://vcg.isti.cnr.it/publication/2016/TPCS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/TPCS16/","section":"publication","summary":"Statics Aware Voronoi Grid-shells have been recently introduced in the Architectural Geometry field. These are innovative grid- shells endowed with a polygonal topology, whose geometry is structurally optimized by means of a novel algorithm. Although being structurally effective and arguably aesthetically charming, so far these grid-shells have struggled to attract architects' interest. We propose a method to fabricate a mockup of the grid shell by using modern additive 3D printing and laser cutting technologies. We also show how the realised mockup can be used to perform a preliminary validation of the simulated static performances of the grid-shell structure.","tags":null,"title":"Design and Fabrication of Grid-shells Mockups","type":"publication"},{"authors":["Gianpaolo Palma","Paolo Cignoni","Tamy Boubekeur","Roberto Scopigno"],"categories":null,"content":" EG 2016 Slides ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"1d3096554a35d763d282b8b89e8bd6d8","permalink":"http://vcg.isti.cnr.it/publication/2016/PCBS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/PCBS16/","section":"publication","summary":"Detecting geometric changes between two 3D captures of the same location performed at different moments is a critical operation for all systems requiring a precise segmentation between change and no-change regions. Such application scenarios include 3D surface reconstruction, environment monitoring, natural events management and forensic science. Unfortunately, typical 3D scanning setups cannot provide any one-to-one mapping between measured samples in static regions: in particular, both extrinsic and intrinsic sensor parameters may vary over time while sensor noise and outliers additionally corrupt the data. In this paper, we adopt a multi-scale approach to robustly tackle these issues. Starting from two point clouds, we first remove outliers using a probabilistic operator. Then, we detect the actual change using the implicit surface defined by the point clouds under a Growing Least Square reconstruction that, compared to the classical proximity measure, offers a more robust change/no-change characterization near the temporal intersection of the scans and in the areas exhibiting different sampling density and direction. The resulting classification is enhanced with a spatial reasoning step to solve critical geometric configurations that are common in man-made environments. We validate our approach on a synthetic test case and on a collection of real data sets acquired using commodity hardware. Finally, we show how 3D reconstruction benefits from the resulting precise change/no-change segmentation. \t \t EG 2016 Slides","tags":null,"title":"Detection of Geometric Temporal Changes in Point Clouds","type":"publication"},{"authors":["Fabio Ganovelli","Giovanni Pintore","Valeria Garro","Enrico Gobbetti","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"d16daf8f604507f6cd1b615b8929409e","permalink":"http://vcg.isti.cnr.it/publication/2016/GPGGS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/GPGGS16/","section":"publication","summary":"We present a novel algorithm for fast metric reconstruction on mobile devices using a combination of image and inertial acceleration data. In contrast to previous approaches to this problem, our algorithm does not require a long acquisition time or intensive data processing and can be implemented entirely on common IMU-enabled tablet and smartphones. The method recovers real world units by comparing the acceleration values from the inertial sensors with the ones inferred from images. In order to cope with IMU signal noise, we propose a novel RANSAC-like strategy which helps to remove the outliers. We demonstrate the effectiveness and the accuracy of our method through an integrated mobile system returning point clouds in metric scale.","tags":null,"title":"Fast Metric Acquisition with Mobile Devices","type":"publication"},{"authors":["Luigi Malomo","Nico Pietroni","Bernd Bickel","Paolo Cignoni"],"categories":null,"content":"Siggraph slides (.key)\n","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"03228a16ad9e2b77aec9cb93317e93cd","permalink":"http://vcg.isti.cnr.it/publication/2016/MPBC16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/MPBC16/","section":"publication","summary":"We present FlexMolds, a novel computational approach to automatically design flexible, reusable molds that, once 3D printed, allow us to physically fabricate, by means of liquid casting, multiple copies of complex shapes with rich surface details and complex topology. The approach to design such flexible molds is based on a greedy bottom-up search of possible cuts over an object, evaluating for each possible cut the feasibility of the resulting mold. We use a dynamic simulation approach to evaluate candidate molds, providing a heuristic to generate forces that are able to open, detach, and remove a complex mold from the object it surrounds. We have tested the approach with a number of objects with nontrivial shapes and topologies. Siggraph slides (.key)","tags":null,"title":"FlexMolds: Automatic Design of Flexible Shells for Molding","type":"publication"},{"authors":["Wei Fan","Giuseppe Valenzise","Francesco Banterle","Frederic Dufaux"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"0b12ae7706add4f6d2f22044f1ae55da","permalink":"http://vcg.isti.cnr.it/publication/2016/FVBD16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/FVBD16/","section":"publication","summary":"","tags":null,"title":"Forensic detection of inverse tone mapping in HDR images ","type":"publication"},{"authors":["Luigi Malomo","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"1452b01d1586324a65d9da795678c768","permalink":"http://vcg.isti.cnr.it/publication/2016/MCS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/MCS16/","section":"publication","summary":"We present an efficient 3D interaction technique: generalizing the well known trackball approach, this technique unifies and blends the two common interaction mechanisms known as panning and orbiting. The approach allows to inspect a virtual object by navigating over its surrounding space, remaining at a chosen distance and performing an automatic panning over its surface. This generalized trackball allows an intuitive navigation of topologically complex shapes, enabling unexperienced users to visit hard-to-reach parts better and faster than with standard GUI components. The approach is based on the construction of multiple smooth approximations of the model under inspection; at rendering time, it constrains the camera to stay at a given distance to these approximations. The approach requires negligible preprocessing and memory overhead and works well for both mousebased and touch interfaces. An informal user study confirms the impact of the proposed technique.","tags":null,"title":"Generalized Trackball for Surfing Over Surfaces","type":"publication"},{"authors":["Tamy Boubekeur","Paolo Cignoni","Elmar Eisemann","Michael Goesele","Reinhard Klein","Stefan Roth","Michael Weinemann","Michael Wimmer"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"d0fbf9ae6cd77d7d1bafd8a6912fd8b1","permalink":"http://vcg.isti.cnr.it/publication/2016/BCEGKRWW16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/BCEGKRWW16/","section":"publication","summary":"","tags":null,"title":"Harvesting Dynamic 3DWorlds from Commodity Sensor Clouds","type":"publication"},{"authors":["Francesco Banterle","Jonas Unger"],"categories":null,"content":"Link\n","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"ecdde0c79d8f2639ca761dd01c523155","permalink":"http://vcg.isti.cnr.it/publication/2016/BU16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/BU16/","section":"publication","summary":"Abstract Capturing HDR videos is still a challenging task because HDR camera systems are either very costly (commercial systems) or have not matured enough to reach consumer markets (research prototypes). Recently, unofficial firmware for cameras has started to appear, and the firmware allows for reprogramming of the system to capture footage with an extended dynamic range. The dynamic range that can be captured in a single shot, however, is still limited and does not fully cover the dynamic range found in high-contrast scenes. There is, therefore, a need for low-cost techniques that allow for HDR-video capture using off-the-shelf equipment. This chapter describes methods for enhancing the standard dynamic range using previously captured HDR photographs of the same scene. Link to the official publication.","tags":null,"title":"High Dynamic Range Video: Concepts, Technologies and Applications","type":"publication"},{"authors":["Alessandro Artusi","Francesco Banterle","Tunc Aydin","Daniele Panozzo","Olga Sorkine-Hornung"],"categories":null,"content":"link to the official website\n","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"90e05971543847a44126c3ac26a5698c","permalink":"http://vcg.isti.cnr.it/publication/2016/ABAPS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/ABAPS16/","section":"publication","summary":"abstract\n\n\n\n\n\n\n\nlink to the official website\n\n\nTable of Contents In recent years visual devices have proliferated, from the massive high-resolution, high-contrast screens to the tiny ones on mobile phones, with their limited dynamic range and color gamut. The wide variety of screens on which content may be viewed creates a challenge for developers. Adapting visual content for optimized viewing on all devices is called retargeting. This is the first book to provide a holistic view of the subject, thoroughly reviewing and analyzing the many techniques that have been developed for retargeting along dimensions such as color gamut, dynamic range, and spatial resolution.\n\n\nThe book is divided in the following chapters:\nIntroduction (a brief introduction on light, human vision, and color spaces) Tone and Color Retargeting Color2Gray Example Based Transferring Spatial Retargeting Quality Assessment\n\nThe book provides a brief appendix on edge-preserving filters (i.e., bilateral filter, anisotropic diffusion, , etc.).","tags":null,"title":"Image Content Retargeting: Maintaining Color, Tone, and Spatial Consistency","type":"publication"},{"authors":["Eliana Siotto","Marco Callieri","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"71dd47a1809a483cd1be1581e4e7f5e1","permalink":"http://vcg.isti.cnr.it/publication/2016/SCDS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/SCDS16/","section":"publication","summary":" ","tags":null,"title":"MeshLab e Blender: software open source in supporto allo studio e alla ricostruzione virtuale della policromia antica","type":"publication"},{"authors":["Francesco Banterle","Alessandro Artusi","Elena Sikudova","Patrick Ledda","Thomas Edward William Bashford-Rogers","Alan Chalmers","Marina Bloj"],"categories":null,"content":"Link\nThe source code\n","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"98c8fefcae5530c8c9dba763feb69905","permalink":"http://vcg.isti.cnr.it/publication/2016/BASLBCB16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/BASLBCB16/","section":"publication","summary":"Abstract In this paper, we present a new technique for displaying High Dynamic Range (HDR) images on Low Dynamic Range (LDR) displays in an efficient way on the GPU. The described process has three stages. First, the input image is segmented into luminance zones. Second, the tone mapping operator (TMO) that performs better in each zone is automatically selected. Finally, the resulting tone mapping (TM) outputs for each zone are merged, generating the final LDR output image. To establish the TMO that performs better in each luminance zone we conducted a preliminary psychophysical experiment using a set of HDR images and six different TMOs. We validated our composite technique on several (new) HDR images and conducted a further psychophysical experiment, using an HDR display as the reference, that establishes the advantages of our hybrid three-stage approach over a traditional individual TMO. Finally, we present a GPU version, which is perceptually equal to the standard version but with much improved computational performance. Link to the official publication. The source code of this method is part of the HDR Toolbox and it is implemented in the function BanterleTMO.m.","tags":null,"title":"Mixing tone mapping operators on the GPU by differential zone mapping based on psychophysical experiments","type":"publication"},{"authors":["Giovanni Pintore","Fabio Ganovelli","Enrico Gobbetti","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"af92d51938cefa975e08bed7fdbdc443","permalink":"http://vcg.isti.cnr.it/publication/2016/PGGS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/PGGS16/","section":"publication","summary":"We present a technology to capture, reconstruct and explore multi-room indoor structures from panorama images generated with the aid of commodity mobile devices. Our approach is motivated by the need for fast and effective systems to simplify indoor data acquisition, as required in many real-world cases where mapping the structure is more important than capturing 3D details, such as the design of smart houses. We combine and extend state-of-the-art results to obtain indoor models scaled to their real-world metric dimension, making them available for online exploration. Moreover, since our target is to assist end-users not necessarily skilled in virtual reality and 3D objects interaction, we introduce a client-server image-based navigation system, exploiting this simplified indoor structure to support a low-degree-of-freedom user interface. We tested our approach in several indoor environments and carried out a preliminary user study to assess the usability of the system by people without a specific technical background.","tags":null,"title":"Mobile Mapping and Visualization of Indoor Structures to Simplify Scene Understanding and Location Awareness","type":"publication"},{"authors":["Giovanni Pintore","Fabio Ganovelli","Enrico Gobbetti","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"2f13b2154c2d2a227178635c0ad66ff7","permalink":"http://vcg.isti.cnr.it/publication/2016/PGGS16a/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/PGGS16a/","section":"publication","summary":"","tags":null,"title":"Mobile reconstruction and exploration of indoor structures exploiting omnidirectional images","type":"publication"},{"authors":["Manuele Sabbadin","Gianpaolo Palma","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"33343423c9c6c8bb663b666fb6505fb9","permalink":"http://vcg.isti.cnr.it/publication/2016/SPCS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/SPCS16/","section":"publication","summary":"","tags":null,"title":"Multi-View Ambient Occlusion for Enhancing Visualization of Raw Scanning Data","type":"publication"},{"authors":["Federico Ponchio","Matteo Dellepiane"],"categories":null,"content":" ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"45bef9bc4be8ad80e0184ec3ad8ea3a5","permalink":"http://vcg.isti.cnr.it/publication/2016/PD16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/PD16/","section":"publication","summary":" ","tags":null,"title":"Multiresolution and fast decompression for optimal web-based rendering","type":"publication"},{"authors":["Eliana Siotto"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"a78c4d1aa50f7cbd82a53308a10d8caa","permalink":"http://vcg.isti.cnr.it/publication/2016/Sio16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/Sio16/","section":"publication","summary":"","tags":null,"title":"Musealizzazione di un dipinto pompeiano: la Venere nella Conchiglia","type":"publication"},{"authors":["Giovanni Pintore","Valeria Garro","Fabio Ganovelli","Marco Agus","Enrico Gobbetti"],"categories":null,"content":" ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"7d714ab9fde6a77d1a73cb2a9a347ea4","permalink":"http://vcg.isti.cnr.it/publication/2016/PGGAG16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/PGGAG16/","section":"publication","summary":"We introduce a light-weight automatic method to quickly capture and recover 2.5D multi-room indoor environments scaled to real-world metric dimensions. To minimize the user effort required, we capture and analyze a single omnidirectional image per room using widely available mobile devices. Through a simple tracking of the user movements between rooms, we iterate the process to map and reconstruct entire floor plans. In order to infer 3D clues with a minimal processing and without relying on the presence of texture or detail, we define a specialized spatial transform based on catadioptric theory to highlight the room's structure in a virtual projection. From this information, we define a parametric model of each room to formalize our problem as a global optimization solved by Levenberg-Marquardt iterations. The effectiveness of the method is demonstrated on several challenging real-world multi-room indoor scenes.","tags":null,"title":"Omnidirectional Image Capture on Mobile Devices for Fast Automatic Generation of 2.5D Indoor Maps","type":"publication"},{"authors":["Damla Ezgi Akçora","Francesco Banterle","Massimiliano Corsini","Ahmet Oguz Akyuz","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"b5262df1441ea02da6d18df97a7dabdf","permalink":"http://vcg.isti.cnr.it/publication/2016/ABCAS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/ABCAS16/","section":"publication","summary":"Abstract We introduce a novel algorithm for obtaining High Dynamic Range (HDR) videos from Standard Dynamic Range (SDR) videos with varying shutter speed or ISO per frame. This capturing technique represents today one of the most popular HDR video acquisition methods, thanks to the availability and the low cost of the equipment required; i.e., an off-the-shelf DSLR camera. However, naïvely merging SDR frames into an HDR video can produce artifacts such as ghosts (when the scene is dynamic), and blurry edges (when the camera moves). In this work, we present a straightforward, easy to implement, and fast technique that produces reasonable results in a short time. This is key for having quick previews of the captured videos without waiting for a long processing time. This is extremely important, especially when capturing videos on modern mobile devices such as smartphones and/or tablets.","tags":null,"title":"Practical-HDR: A Simple and Effective Method for Merging High Dynamic Range Videos","type":"publication"},{"authors":["Andrea Baldacci","Fabio Ganovelli","Massimiliano Corsini","Roberto Scopigno"],"categories":null,"content":" ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"de07527cb53bf085d56769a25bb3a2f6","permalink":"http://vcg.isti.cnr.it/publication/2016/BGCS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/BGCS16/","section":"publication","summary":"Using synthetic videos to present a 3D scene is a common requirement for architects, designers, engineers or Cultural Heritage professionals however it is usually time consuming and, in order to obtain high quality results, the support of a film maker/computer animation expert is necessary. We introduce an alternative approach that takes the 3D scene of interest and an example video as input, and automatically produces a video of the input scene that resembles the given video example. In other words, our algorithm allows the user to 'replicate' an existing video, on a different 3D scene. We build on the intuition that a video sequence of a static environment is strongly characterized by its optical flow, or, in other words, that two videos are similar if their optical flows are similar. We therefore recast the problem as producing a video of the input scene whose optical flow is similar to the optical flow of the input video. Our intuition is supported by a user-study specifically designed to verify this statement. We have successfully tested our approach on several scenes and input videos, some of which are reported in the accompanying material of this paper.","tags":null,"title":"Presentation of 3D Scenes through Video Example","type":"publication"},{"authors":["Nicolas Mellado","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"99c8bc20efabfcf46dc3c386f023eb55","permalink":"http://vcg.isti.cnr.it/publication/2016/MDS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/MDS16/","section":"publication","summary":"","tags":null,"title":"Relative scale estimation and 3D registration of multi-modal geometry using Growing Least Squares","type":"publication"},{"authors":["Eliana Siotto","Clara Baracchini","Ulderico Santamaria","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"d50a0ee354f58dc60af3ce79400350e1","permalink":"http://vcg.isti.cnr.it/publication/2016/SBSS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/SBSS16/","section":"publication","summary":"","tags":null,"title":"Sperimentazione del Sistema Ministeriale SICaR w/b per la gestione e la consultazione informatizzata dei dati sulla policromia","type":"publication"},{"authors":["Davide Tonelli","Nico Pietroni","Enrico Puppo","Maurizio Froli","Paolo Cignoni","Gennaro Amendola","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"3b12315d34403e7b4344a89305528758","permalink":"http://vcg.isti.cnr.it/publication/2016/TPPFCAS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/TPPFCAS16/","section":"publication","summary":"Grid-shells are lightweight structures used to cover long spans with few load-bearing material, as they excel for lightness, elegance and transparency. In this paper we analyse the stability of hex-dominant free-form grid-shells, generated with the Statics Aware Voronoi Remeshing scheme introduced in Pietroni et al. (2015). This is a novel hex-dominant, organic-like and non uniform remeshing pattern that manages to take into account the statics of the underlying surface. We show how this pattern is particularly suitable for free-form grid-shells, providing good performance in terms of both aesthetics and structural behaviour. To reach this goal, we select a set of four con- temporary architectural surfaces and we establish a systematic comparative analysis between Statics Aware Voronoi Grid-Shells and equivalent state of the art triangular and quadrilateral grid-shells. For each dataset and for each grid-shell topology, imperfection sensitivity analyses are carried out and the worst response diagrams compared. It turns out that, in spite of the in- trinsic weakness of the hexagonal topology, free-form Statics Aware Voronoi Grid-Shells are much more effective than their state-of-the-art quadrilateral counterparts.","tags":null,"title":"Stability of Statics Aware Voronoi Grid-Shells","type":"publication"},{"authors":["Karina Rodriguez Echavarria","Asla Medeiros e Sá","Nico Pietroni","Paolo Cignoni"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"9ea6135f8375a4562f328882506ed719","permalink":"http://vcg.isti.cnr.it/publication/2016/MRPC16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/MRPC16/","section":"publication","summary":"Digital fabrication technologies are becoming of importance to a number of knowledge areas and sectors, including medicine, entertainment, design, engineering, education, arts and architecture, due to their accessibility and versatility. These technolo- gies are changing the design of digital models, materials and manufacturing processes which enable to build previously un- achievable physical objects. Since many constraints imposed on the design of objects have changed significantly, a growing research community is working on graphical tools and techniques to enable the conception, automation, production and usage of innovative and complex designs for fabrication. In the present work, we survey the state of the art of computer graphics contributions to functional fabrication design tools and techniques. By functional fabrication we understand the design and manufacture of physical objects which functionalities exploit the capabilities of digital fabrication technologies. These func- tionalities include improving the mechanics of a workpiece, producing articulated models, capturing aerodynamics, planning deformable workpieces and controlling the object's appearance and acoustics. The resulting design tools are clearly taking advantage of relevant computer graphics techniques. Furthermore, they are extending these techniques to realise new physical forms as well as bringing innovation to feed into the design space.","tags":null,"title":"State Of The Art on Functional Fabrication","type":"publication"},{"authors":["Marion Lamé","Federico Ponchio","Ivan Radman-Livaja","Bruce Robertson"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"2fa7f5341aa3b9e416b59bed523200d7","permalink":"http://vcg.isti.cnr.it/publication/2016/LPRR16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/LPRR16/","section":"publication","summary":"","tags":null,"title":"Teaching (Digital) Epigraphy","type":"publication"},{"authors":["Rafal Mantiuk","Gabriel Eilertsen","Francesco Banterle","Jonas Unger"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"e8ef9a24bc7f5719b4f6a3c265b52912","permalink":"http://vcg.isti.cnr.it/publication/2016/UBEM16a/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/UBEM16a/","section":"publication","summary":"abstract\n\n\n\n\n\n\n\n\nAbstract High dynamic range (HDR) video technology has gone through remarkable developments over the last few years; HDR-video cameras are being commercialized, new algorithms for color grading and tone mapping specifically designed for HDR-video have recently been proposed, and the first open source compression algorithms for HDR-video are becoming available. HDR-video represents a paradigm shift in imaging and computer graphics, which has and will continue to generate a range of both new research challenges and applications. This intermediate-level tutorial will give an in-depth overview of the full HDR-video pipeline present several examples of state-of-the-art algorithms and technology in HDR-video capture, tone mapping, compression and specific applications in computer graphics.","tags":null,"title":"The HDR-video pipeline","type":"publication"},{"authors":["Nico Pietroni","Enrico Puppo","Giorgio Marcias","Roberto Scopigno","Paolo Cignoni"],"categories":null,"content":" Pacific Graphics 2016 Slides Data ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"4b1cfee9ede86b4736db1a3c945a0151","permalink":"http://vcg.isti.cnr.it/publication/2016/PPMSC16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/PPMSC16/","section":"publication","summary":"Given a cross field over a triangulated surface we present a practical and robust method to compute a field aligned coarse quad layout over the surface. The method works directly on a triangle mesh without requiring any parametrization and it is based on a new technique for tracing field-coherent geodesic paths directly on a triangle mesh, and on a new relaxed formulation of a binary LP problem, which allows us to extract both conforming quad layouts and coarser layouts containing t-junctions. Our method is easy to implement, very robust, and, being directly based on the input cross field, it is able to generate better aligned layouts, even with complicated fields containing many singularities. We show results on a number of datasets and comparisons with state-of-the-art methods. Pacific Graphics 2016 Slides Data","tags":null,"title":"Tracing Field-Coherent Quad Layouts","type":"publication"},{"authors":["Marco Tarini"],"categories":null,"content":" Project page (with demo, sources, etc). ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"dab2fbed2f6ce4d5a7761c45d6106092","permalink":"http://vcg.isti.cnr.it/publication/2016/Tar16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/Tar16/","section":"publication","summary":"UV-maps are required in order to apply a 2D texture over a 3D model.Conventional UV-maps are defined by an assignment of uv positions to mesh vertices. We present an alternative representation, volume-encoded UV-maps, in which each point on the surface is mapped to a uv position which is solely a function of its 3D position. This function is tailored for a target surface: its restriction to the surface is a parametrization exhibiting high quality, e.g. in terms of angle and area preservation; and, near the surface, it is almost constant for small orthogonal displacements.The representation is applicable to a wide range of shapes and UV-maps, and unlocks several key advantages: it removes the need to duplicate vertices in the mesh to encode cuts in the map; it makes the UV-map representation independent from the meshing of the surface; the same texture, and even the same UV-map, can be shared by multiple geometrically similar models (e.g.alllevelsofa LoDpyramid); UV-maps can be applied to representations other than polygonal meshes, like point clouds or set of registered range-maps.Our schema is cheap on GPU computational and memory resources, requiring only a single, cache-coherent indirection to a small volumetric texture per fragment.We also provide an algorithm to construct a volume-encoded UV-map given a target surface. \t Project page (with demo, sources, etc).","tags":null,"title":"Volume-encoded UV-maps","type":"publication"},{"authors":["Fabrizio Galeazzi","Marco Callieri","Matteo Dellepiane","Michael Charmo","Julian Richards","Roberto Scopigno"],"categories":null,"content":" ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"4db6c93fae6c4dafc72041fb080d87c7","permalink":"http://vcg.isti.cnr.it/publication/2016/GCDCRS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/GCDCRS16/","section":"publication","summary":" ","tags":null,"title":"Web-based visualization for 3D data in archaeology: The ADS 3D viewer","type":"publication"},{"authors":["Andrea Baldacci","Daniele Bernabei","Fabio Ganovelli","Massimiliano Corsini","Roberto Scopigno"],"categories":null,"content":" ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"628ed99728c36374db7654f318d2c940","permalink":"http://vcg.isti.cnr.it/publication/2015/BBGCS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/BBGCS15/","section":"publication","summary":"We present a novel interactive framework for improving 3D reconstruction starting from incomplete or noisy results obtained through image-based reconstruction algorithms. The core idea is to enable the user to provide localized hints on the curvature of the surface, which are turned into constraints during an energy minimization reconstruction. To make this task simple we propose two algorithms. The first is a multi-view segmentation algorithm that allows the user to propagate the foreground selection of one or more images both to all the images of the input set and to the 3D points, in order to accurately select the part of the scene to be reconstructed. The second is a fast GPU-based algorithm for the reconstruction of smooth surfaces from multiple views, which incorporates the hints provided by the user. We show that our framework can turn a poor quality reconstruction produced with state-ofthe-art image-based reconstruction methods into a high quality one.","tags":null,"title":"3D Reconstruction for Featurless Scenes with Curvature Hints","type":"publication"},{"authors":["Marco Potenziani","Marco Callieri","Matteo Dellepiane","Massimiliano Corsini","Federico Ponchio","Roberto Scopigno"],"categories":null,"content":" ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"7a6f600051656d5a49388173891608b4","permalink":"http://vcg.isti.cnr.it/publication/2015/PCDCPS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/PCDCPS15/","section":"publication","summary":" ","tags":null,"title":"3DHOP: 3D Heritage Online Presenter","type":"publication"},{"authors":["Roberto Scopigno","Marco Callieri","Matteo Dellepiane","Eliana Siotto","Corrado Gratziu","Alessandra Moscato","Lucia Burgio","Stefano Legnaioli","Giulia Lorenzetti","Vincenzo Palleschi"],"categories":null,"content":"","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"2e47193bfdf8ed320adb223b189ab838","permalink":"http://vcg.isti.cnr.it/publication/2015/SDCSGMBLLP15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/SDCSGMBLLP15/","section":"publication","summary":"","tags":null,"title":"A multidisciplinary approach for the study and the virtual reconstruction of the ancient polychromy of Roman sarcophagi","type":"publication"},{"authors":["Marco Callieri","Paolo Pingi","Marco Potenziani","Matteo Dellepiane","Gaia Pavoni","Aurelia Lureau","Roberto Scopigno"],"categories":null,"content":" ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"d4ea799fb13a1e4e30222029530eda3e","permalink":"http://vcg.isti.cnr.it/publication/2015/CPPDPLS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/CPPDPLS15/","section":"publication","summary":" ","tags":null,"title":"Alchemy in 3D – A Digitization for a Journey Through Matter","type":"publication"},{"authors":["Eliana Siotto","Marco Callieri","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":"","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"5b0b9547a556e1dfa674df27f0360c38","permalink":"http://vcg.isti.cnr.it/publication/2015/SCDS15a/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/SCDS15a/","section":"publication","summary":"","tags":null,"title":"Ancient polychromy: study and virtual reconstruction using open source tools","type":"publication"},{"authors":["Rosario Aiello","Francesco Banterle","Nico Pietroni","Luigi Malomo","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" Iciap presentation ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"157ef14c17ebb8fbcf3a4deeb0ee2df6","permalink":"http://vcg.isti.cnr.it/publication/2015/ABPMCS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/ABPMCS15/","section":"publication","summary":"In this paper, we propose a novel method for accelerating the computation of geodesic distances over arbitrary manifold triangulated surfaces. The method is based on a preprocessing step where we build a data structure. This allows to store arbitrary complex distance metrics. We show that, by exploiting the precomputed data, the proposed method is significantly faster than the classical Dijkstra algorithm for the com- putation of point to point distances. Moreover, as we precompute exact geodesic distances, the proposed approach can be more accurate than state-of-the-art approximations. Iciap presentation","tags":null,"title":"Compression and Querying of Arbitrary Geodesic Distances","type":"publication"},{"authors":["Giorgio Marcias","Kenshi Takayama","Nico Pietroni","Daniele Panozzo","Olga Sorkine","Enrico Puppo","Paolo Cignoni"],"categories":null,"content":" Siggraph presentation Code (GUI for retopology - SketchRetopo) Code (learning patches) Some quadrangulated meshes A video Showing comparison with previous methods A database of learned patches ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"4e88556819ad5f6c44af7c67c6bab06d","permalink":"http://vcg.isti.cnr.it/publication/2015/MTPPSPC15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/MTPPSPC15/","section":"publication","summary":"We propose an interactive quadrangulation method based on a large collection of patterns that are learned from models manually designed by artists. The patterns are distilled into compact quadrangulation rules and stored in a database. At run-time, the user draws strokes to define patches and desired edge flows, and the system queries the database to extract fitting patterns to tessellate the sketches' interiors. The quadrangulation patterns are general and can be applied to tessellate large regions while controlling the positions of the singularities and the edge flow. We demonstrate the effectiveness of our algorithm through a series of live retopology sessions and an informal user study with three professional artists. Siggraph presentation Code (GUI for retopology - SketchRetopo) Code (learning patches) Some quadrangulated meshes A video Showing comparison with previous methods A database of learned patches","tags":null,"title":"Data-Driven Interactive Quadrangulation","type":"publication"},{"authors":["Eliana Siotto","Gianpaolo Palma","Marco Potenziani","Roberto Scopigno"],"categories":null,"content":" ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"b9db629fe8265ddef73228d5f1b3b668","permalink":"http://vcg.isti.cnr.it/publication/2015/SPPS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/SPPS15/","section":"publication","summary":" ","tags":null,"title":"Digital Study and Web - based Documentation of the Colour and Gilding on Ancient Marble Artworks","type":"publication"},{"authors":["Luigi Malomo","Francesco Banterle","Paolo Pingi","Marco Callieri","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":"VirtualTour\n","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"534ab435718e4482cc8b123f6789be38","permalink":"http://vcg.isti.cnr.it/publication/2015/MBPCDS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/MBPCDS15/","section":"publication","summary":"abstract\n\n\n\n\n\nAbstract A very large number of sites, probably the large majority of our Cultural Heritage (CH), are unaccessible to the public due to the lack of infrastructure, improper security conditions or lack of personnel. Digitizing in 3D those sites is not very complicated nowadays. We will briefly review the technology available for cheap 3D digitization, from 3D scanning to cheaper photogrammetric solutions. However, digitization per se is not a solution: 3D models have to be shared in the widest and easiest manner. We will present the design and results of a software instrument that aims at supporting easy navigation of 3D digitized spaces, running on top of mobile devices such as tablets or smartphones. The main goal of this project is to guarantee navigation with ease for users without experience in computer graphics and videogames, while providing high-fidelity rendering of the digital 3D model.\n\n\nMore details please have a look to the official VirtualTour webpage.","tags":null,"title":"Digitizing and navigating unaccessible archaeological sites on mobile devices","type":"publication"},{"authors":["Emin Zerman","Giuseppe Valenzise","Francesca De Simone","Francesco Banterle","Frederic Dufaux"],"categories":null,"content":"","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"91e474eeaa74ddbdf7f99dd350b96212","permalink":"http://vcg.isti.cnr.it/publication/2015/ZVDBD15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/ZVDBD15/","section":"publication","summary":"abstract\n\n\n\n\n\nAbstract High dynamic range (HDR) displays use local backlight modulation to produce both high brightness levels and large contrast ratios. Thus, the display rendering algorithm and its parameters may greatly affect HDR visual experience. In this paper, we analyze the impact of display rendering on perceived quality for a specific display (SIM2 HDR47) and for a popular application scenario, i.e., HDR image compression. To this end, we assess whether significant differences exist between subjective quality of compressed images, when these are displayed using either the built-in rendering of the display, or a rendering algorithm developed by ourselves. As a second contribution of this paper, we investigate whether the possibility to estimate the true pixel-wise luminance emitted by the display, offered by our rendering approach, can improve the performance of HDR objective quality metrics that require true pixel-wise luminance as input. © (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.","tags":null,"title":"Effects of display rendering on HDR image quality assessment ","type":"publication"},{"authors":["Julian Panetta","Qingnan Zhou","Luigi Malomo","Nico Pietroni","Paolo Cignoni","Denis Zorin"],"categories":null,"content":" Some of the tested patterns Siggraph presentation ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"6786eacc30e25fa827193dcaccc38c68","permalink":"http://vcg.isti.cnr.it/publication/2015/PZMPCZ15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/PZMPCZ15/","section":"publication","summary":"We introduce elastic textures: a set of parametric, tileable, printable, cubic patterns achieving a broad range of elastic material properties: the softest pattern is over a thousand times softer than the stiffest, and the Poisson ratios range from below zero to nearly 0.5. Using a combinatorial search over topologies followed by shape optimization, we explore a wide space of wireframe-like, symmetric 3D patterns to obtain a small family. This pattern family can be printed without internal support structure on a single-material 3D printer and can be used to fabricate objects with prescribed mechanical behavior. The family can be extended easily to create families of anisotropic patterns with target orthotropic properties. We demonstrate that our elastic textures are able to achieve a user-supplied variable distribution of material properties. We also present a material optimization algorithm to choose material prop- erties at each point within an object to best fit a target deformation under a prescribed load. We show that, by fabricating these spatially varying materials with elastic textures, the desired behavior is achieved by the printed object. Some of the tested patterns Siggraph presentation","tags":null,"title":"Elastic Textures for Additive Fabrication","type":"publication"},{"authors":["Nicolo Dell Unto","Anne-Marie Leander","Giacomo Landeschi","Matteo Dellepiane","Marco Callieri","Daniele Ferdani"],"categories":null,"content":" ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"a508580fa6bdaa3b416565196e6a1130","permalink":"http://vcg.isti.cnr.it/publication/2015/DLLDCF15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/DLLDCF15/","section":"publication","summary":" ","tags":null,"title":"Experiencing Ancient Buildings from a 3D GIS Perspective: a Case Drawn from the Swedish Pompeii Project","type":"publication"},{"authors":["Francesco Usai","Marco Livesu","Enrico Puppo","Marco Tarini","Riccardo Scateni"],"categories":null,"content":" Data Available Here.\nVideo (youtube).\n","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"d346bfe15aee3827fe603bcad9b7f7b0","permalink":"http://vcg.isti.cnr.it/publication/2015/ULPTS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/ULPTS15/","section":"publication","summary":"Starting from the triangle mesh of a digital shape, mainly an articulated object, we produce a coarse quad layout that can be used in character modeling and animation. Our quad layout follows the intrinsic object structure described by its curve skeleton; it contains few irregular vertices of low degree; it can be immediately refined into a semi-regular quad mesh; it provides a structured domain for UV-mapping and parametrization. Our method is fast, one-click and it does not require any parameter setting. The user can steer and refine the process through simple interactive tools during the construction of the quad layout. Data Available Here. Video (youtube).","tags":null,"title":"Extraction of the Quad Layout of a Triangle Mesh Guided by its Curve-Skeleton","type":"publication"},{"authors":["Paolo Pingi","Massimiliano Corsini","Fabio Ganovelli","Roberto Scopigno"],"categories":null,"content":"","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"8bad5198cb3ea28c3d079f3d36919e90","permalink":"http://vcg.isti.cnr.it/publication/2015/PCGS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/PCGS15/","section":"publication","summary":"","tags":null,"title":"Fast and Simple Automatic Alignment of Large Sets of Range Maps ","type":"publication"},{"authors":["Federico Ponchio","Matteo Dellepiane"],"categories":null,"content":" ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"bace96d1a70396c7c791a4807a91e4e6","permalink":"http://vcg.isti.cnr.it/publication/2015/PD15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/PD15/","section":"publication","summary":" ","tags":null,"title":"Fast decompression for web-based view-dependent 3D rendering","type":"publication"},{"authors":["Olga Sorkine-Hornung","Daniele Panozzo","Marco Tarini","Wenzel Jakob"],"categories":null,"content":" Code and executables on gitHub!\n","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"7dce2e918e1ae8fb82682e165f9b6192","permalink":"http://vcg.isti.cnr.it/publication/2015/JTPS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/JTPS15/","section":"publication","summary":"We present a novel approach to remesh a surface into an isotropic triangular or quad-dominant mesh using a unified local smoothing operator that optimizes both the edge orientations and vertex positions in the output mesh. Our algorithm produces meshes with high isotropy while naturally aligning and snapping edges to sharp features. The method is simple to implement and parallelize, and it can process a variety of input surface representations, such as point clouds, range scans and triangle meshes. Our full pipeline executes instantly (less than a second) on meshes with hundreds of thousands of faces, enabling new types of interactive workflows. Since our algorithm avoids any global optimization, and its key steps scale linearly with input size, we are able to process extremely large meshes and point clouds, with sizes exceeding several hundred million elements. To demonstrate the robustness and effectiveness of our method, we apply it to hundreds of models of varying complexity and provide our cross-platform reference implementation in the supplemental material. Code and executables on gitHub!","tags":null,"title":"Instant Field-aligned Meshes","type":"publication"},{"authors":["Paolo Pingi","Luigi Malomo","Franco Alberto Cardillo","Francesco Banterle","Francesco Gabellone","Giuseppe Amato"],"categories":null,"content":" LecceAR\n","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"c5fe095f9fb0e9b316eb55159677e4c3","permalink":"http://vcg.isti.cnr.it/publication/2015/BCMPGA15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/BCMPGA15/","section":"publication","summary":"abstract\n\n\n\n\n\nAbstract This paper discusses a case study on the use of augmented reality (AR) within the context of cultural heritage. We implemented an iOS app for markerless AR that will be exhibited at the MUST museum in Lecce, Italy. The app shows a rich 3D reconstruction of the Roman amphitheater, which is nowadays only partially visible. The use of state-of-the-art algorithms in computer graphics and computer vision allows the viewing and the exploration of the ancient theater in real-time.\n\n\nMore details please have a look to the official LecceAR webpage.","tags":null,"title":"LecceAR: An Augmented Reality App","type":"publication"},{"authors":["Francesco Banterle","Franco Alberto Cardillo","Luigi Malomo"],"categories":null,"content":" LecceAR\n","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"c79befb62c03f15bd6ff6e0bd8b01e18","permalink":"http://vcg.isti.cnr.it/publication/2015/BCM15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/BCM15/","section":"publication","summary":"abstract\n\n\n\n\n\nAbstract Augmented Reality (AR) - the augmentation of a physical world's view with digital media - has recently gained popularity thanks to the increasing computational power and diffusion of mobile devices such as tablets, and smartphones. These developments allow many practical applications of AR technology, especially in the cultural heritage domain. LecceAR is an advanced app that allows tourists to view rich 3D reconstructions of cultural heritage sites within the city of Lecce in Italy. LecceAR is an iOS app for markerless AR that will be exhibited at the MUST museum in Lecce, Italy. The app shows a rich 3D reconstruction of the Lecce Roman amphitheatre, which is only partially unearthed (see Figure 1). The use of state-of-the-art algorithms in computer graphics and computer vision allows an ancient theatre to be viewed and explored in real-time.\n\n\nMore details please have a look to the official LecceAR webpage.","tags":null,"title":"LecceAR: An Augmented Reality App for Cultural Heritage ","type":"publication"},{"authors":["Paolo Cignoni","Nico Pietroni","Luigi Malomo","Roberto Scopigno"],"categories":null,"content":"","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"2996e1403b638cba9e371c24194d3fdf","permalink":"http://vcg.isti.cnr.it/publication/2015/CPMS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/CPMS15/","section":"publication","summary":"","tags":null,"title":"Mesh Joinery: A Method for Building Fabricable Structures","type":"publication"},{"authors":["Joel Kronander","Francesco Banterle","Andrew Gardner","Ehsan Miandji","Jonas Unger"],"categories":null,"content":"","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"9cfef0308d8761bc2dbed81029bfe5a6","permalink":"http://vcg.isti.cnr.it/publication/2015/KBGMU15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/KBGMU15/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstractPhoto-realistic rendering of virtual objects into real scenes is one of the most important research problems in computer graphics. Methods for capture and rendering of mixed reality scenes are driven by a large number of applications, ranging from augmented reality to visual effects and product visualization. Recent developments in computer graphics, computer vision, and imaging technology have enabled a wide range of new mixed reality techniques including methods of advanced image based lighting, capturing spatially varying lighting conditions, and algorithms for seamlessly rendering virtual objects directly into photographs without explicit measurements of the scene lighting. This report gives an overview of the state-of-the-art in this field, and presents a categorization and comparison of current methods. Our in-depth survey provides a tool for understanding the advantages and disadvantages of each method, and gives an overview of which technique is best suited to a specific problem.","tags":null,"title":"Photorealistic rendering of mixed reality scenes","type":"publication"},{"authors":["Marco Livesu","Alla Sheffer","Nicholas Vining","Marco Tarini"],"categories":null,"content":"[ project page ]\n[ Video ] ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"dfb1bf27cb2b3441534c831b574604e2","permalink":"http://vcg.isti.cnr.it/publication/2015/LSVT15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/LSVT15/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstractThe usability of hexahedral meshes depends on the degree to which the shape of their elements deviates from a perfect cube; a single concave, or inverted element makes a mesh unusable. While a range of methods exist for discretizing 3D objects with an initial topologically suitable hex mesh, their output meshes frequently contain poorly shaped and even inverted elements, requiring a further quality optimization step. We introduce a novel framework for optimizing hex-mesh quality capable of generating inversion-free high-quality meshes from such poor initial inputs. We recast hex quality improvement as an optimization of the shape of overlapping cones, or unions, of tetrahedra surrounding every directed edge in the hex mesh, and show the two to be equivalent. We then formulate cone shape optimization as a sequence of convex quadratic optimization problems, where hex convexity is encoded via simple linear inequality constraints. As this solution space may be empty, we therefore present an alternate formulation which allows the solver to proceed even when constraints cannot be satisfied exactly. We iteratively improve mesh element quality by solving at each step a set of local, per-cone, convex constrained optimization problems, followed by a global energy minimization step which reconciles these local solutions. This latter method provides no theoretical guarantees on the solution but produces inversion-free, high quality meshes in practice. We demonstrate the robustness of our framework by optimizing numerous poor quality input meshes generated using a variety of initial meshing methods and producing high-quality inversion-free meshes in each case. We further validate our algorithm by comparing it against previous work, and demonstrate a significant improvement in both worst and average element quality.\n\n[ project page ] [ Video ]","tags":null,"title":"Practical Hex-Mesh Optimization via Edge-Cone Rectification","type":"publication"},{"authors":["Marco Callieri","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"a36fee7d72312a985c48e5768402e0ae","permalink":"http://vcg.isti.cnr.it/publication/2015/CDS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/CDS15/","section":"publication","summary":" ","tags":null,"title":"Remote visualization and navigation of 3D models of archeological sites","type":"publication"},{"authors":["Silvia Biasotti","Andrea Cerri","Masaki Aono","A. Ben Hamza","Valeria Garro","Andrea Giachetti","Daniela Giorgi","Afzal A. Godil","Gary C. Li","C. Sanada","Michela Spagnuolo","Atsushi Tatsuma","Santiago Velasco Forero"],"categories":null,"content":"","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"7f04f2bcd339ec18d7960b8f6b7431a2","permalink":"http://vcg.isti.cnr.it/publication/2015/BCAHGGGGLSSTV15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/BCAHGGGGLSSTV15/","section":"publication","summary":"","tags":null,"title":"Retrieval and classification methods for textured 3D models: a comparative study","type":"publication"},{"authors":["Valeria Garro","Andrea Giachetti"],"categories":null,"content":"","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"566094a096377d475f6851b297936634","permalink":"http://vcg.isti.cnr.it/publication/2015/GG15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/GG15/","section":"publication","summary":"","tags":null,"title":"Scale space graph representation and kernel matching for non rigid and textured 3D shape retrieval","type":"publication"},{"authors":["Nico Pietroni","Davide Tonelli","Enrico Puppo","Maurizio Froli","Roberto Scopigno","Paolo Cignoni"],"categories":null,"content":" Talk Slides Downloadable Data ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"0e124e7e3f04cda7ac03e7640ebe1324","permalink":"http://vcg.isti.cnr.it/publication/2015/PTPFSC15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/PTPFSC15/","section":"publication","summary":"We introduce a framework for the generation of polygonal grid-shell architectural structures, whose topology is designed in order to excel in static performances. We start from the analysis of stress on the input surface and we use the resulting tensor field to induce an anisotropic non-Euclidean metric over it. This metric is derived by studying the relation between the stress tensor over a continuous shell and the optimal shape of polygons in a corresponding grid-shell. Polygonal meshes with uniform density and isotropic cells under this metric exhibit variable density and anisotropy in Euclidean space, thus achieving a better distribution of the strain energy over their elements. Meshes are further optimized taking into account symmetry and regularity of cells to improve aesthetics. We experiment with quad meshes and hex-dominant meshes, demonstrating that our grid-shells achieve better static performances than state-of-the-art grid-shells. Talk Slides Downloadable Data","tags":null,"title":"Statics Aware Grid Shells","type":"publication"},{"authors":["Daniele Panozzo","Olga Diamanti","Sylvain Paris","Marco Tarini","Evgeni Sorkine","Olga Sorkine-Hornung"],"categories":null,"content":" ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"732d3f91f3eda4016e120509fec5e359","permalink":"http://vcg.isti.cnr.it/publication/2015/PDPTSS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/PDPTSS15/","section":"publication","summary":"In the digital world, assigning arbitrary colors to an object is a simple operation thanks to texture mapping. However, in the real world, the same basic function of applying colors onto an object is far from trivial. One can specify colors during the fabrication process using a color 3D printer, but this does not apply to already existing objects. Paint and decals can be used during post-fabrication, but they are challenging to apply on complex shapes. In this paper, we develop a method to enable texture mapping of physical objects, that is, we allow one to map an arbitrary color image onto a three-dimensional object. Our approach builds upon hydrographics, a technique to transfer pigments printed on a sheet of polymer onto curved surfaces. We first describe a setup that makes the traditional water transfer printing process more accurate and consistent across prints. We then simulate the transfer process using a specialized parameterization to estimate the mapping between the planar color map and the object surface. We demonstrate that our approach enables the application of detailed color maps onto complex shapes such as 3D models of faces and anatomical casts.","tags":null,"title":"Texture Mapping Real-World Objects with Hydrographics ","type":"publication"},{"authors":["Chiara Leoni","Marco Callieri","Matteo Dellepiane","Daniel O Donnell","Roberto Rosselli Del Turco","Roberto Scopigno"],"categories":null,"content":" ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"42441df376570f7a61dedf8bee7ce521","permalink":"http://vcg.isti.cnr.it/publication/2015/LCDORS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/LCDORS15/","section":"publication","summary":" ","tags":null,"title":"The Dream and the Cross: A 3D Scanning Project to Bring 3D Content in a Digital Edition","type":"publication"},{"authors":["Luigi Malomo","Francesco Banterle","Paolo Pingi","Francesco Gabellone","Roberto Scopigno"],"categories":null,"content":" VirtualTour\n","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"87e563155d00d4408919e2fae023ca4f","permalink":"http://vcg.isti.cnr.it/publication/2015/MBPGS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/MBPGS15/","section":"publication","summary":"abstract\n\n\n\n\n\nAbstract In the last few years, mobile or wearable virtual reality has gained new interest amongst the industry and researchers. The rapid development of new technologies such as high quality head mounted displays, accurate and cheap motion sensors (e.g. accelerometers, gyroscopes, depth cameras, etc.), localization sensors (e.g. GPS, compass, etc.) etc. have led to new opportunities that just a few years ago were not possible to achieve with off-the-shelf components. This renaissance of virtual reality is happening in both research and practical applications, such as computer games, movies, documentaries, learning, urban planning, etc. In this work we propose a system, VirtualTour, offering virtual exploration of Cultural Heritage (CH) sites on mobile devices based on a natural interaction approach; a few easy to understand (and to be tracked) actions performed by the user in the real world are translated into navigation instructions in the virtual world. To achieve this goal, we have exploited embedded sensors and the fast hardware of modern mobile devices.\n\nMore details please have a look to the official VirtualTour webpage.","tags":null,"title":"VirtualTour: A System for Exploring Cultural Heritage Sites in an Immersive Way","type":"publication"},{"authors":["Marco Potenziani","Marco Callieri","Roberto Scopigno"],"categories":null,"content":" ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"6cb2d8afa131dbcd7313657b8a5f8855","permalink":"http://vcg.isti.cnr.it/publication/2014/PCS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/PCS14/","section":"publication","summary":" ","tags":null,"title":"3DHOP: A Novel Technological Solution for the Development of Online Virtual Museums ","type":"publication"},{"authors":["Marco Tarini","Daniele Panozzo","Olga Sorkine"],"categories":null,"content":" ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"a4ddd17277c02ab7c0af50c9246e7511","permalink":"http://vcg.isti.cnr.it/publication/2014/TPS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/TPS14/","section":"publication","summary":"Project Page In the context of real-time, GPU-based rendering of animated skinned meshes, we propose a new algorithm to compute surface normals with minimal overhead both in terms of the memory footprint and the required per-vertex operations. By accounting for the variation of the skinning weights over the surface, we achieve a higher visual quality compared to the standard approximation ubiquitously used in video-game engines and other real-time applications. Our method supports Linear Blend Skinning and Dual Quaternion Skinning. We demonstrate the advantages of our technique on a variety of datasets and provide a complete open-source implementation, including GLSL shaders.","tags":null,"title":"Accurate and Efficient Lighting for Skinned Models","type":"publication"},{"authors":["Marco Potenziani","Massimiliano Corsini","Marco Callieri","Marco Di Benedetto","Federico Ponchio","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"993353d4bc9ecf07e86ed82dfa6a9132","permalink":"http://vcg.isti.cnr.it/publication/2014/PCCDPDS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/PCCDPDS14/","section":"publication","summary":" ","tags":null,"title":"An Advanced Solution for Publishing 3D Content on the Web","type":"publication"},{"authors":["Arjen Boin","Frederik Bynander","Giovanni Pintore","Fabio Ganovelli","George Leventakis","Alexandre Ahmad","Olivier Balet"],"categories":null,"content":"","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"f37b0f934db97cffd3553a6fae415e32","permalink":"http://vcg.isti.cnr.it/publication/2014/BBPGLAB14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/BBPGLAB14/","section":"publication","summary":"","tags":null,"title":"Building an IT Platform for Strategic Crisis Management Preparation","type":"publication"},{"authors":["Francesco Banterle","Alessandro Artusi","Paolo Francesco Banterle","Roberto Scopigno"],"categories":null,"content":"","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"523eef982b22eaadaf0fe52e2169e115","permalink":"http://vcg.isti.cnr.it/publication/2014/BABS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/BABS14/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstractPhysically based renderers produce high quality images with high dynamic range (HDR) values. Therefore, these images need to be tone mapped in order to be displayed on low dynamic range (LDR) displays. A typical approach is to blindly apply tone mapping operators without taking advantage of the extra information that comes for free from the modeling process for creating a 3D scene. In this paper, we propose a novel pipeline for tone mapping high dynamic range (HDR) images which are generated using physically based renderers. Our work exploits information of a 3D scene, such as geometry, materials, luminaries, etc. This allows to limit the assumptions that are typically made during the tone mapping step. As consequence of this, we will show improvements in term of quality while keeping the entire process straightforward.","tags":null,"title":"CG-TMO: A Local Tone Mapping for Computer Graphics Generated Content","type":"publication"},{"authors":["Paolo Pingi","Eliana Siotto","Marco Callieri","Andrea Ferrara","Roberto Scopigno"],"categories":null,"content":"","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"ac88bcfea28f32420c7b56ec4859fba3","permalink":"http://vcg.isti.cnr.it/publication/2014/PSCFS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/PSCFS14/","section":"publication","summary":"","tags":null,"title":"Dallo stato di rudere alla realtà virtuale","type":"publication"},{"authors":["Matteo Dellepiane","Marco Callieri","Nico Pietroni","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"8ce765a0fc3b07a39160e9fb22543c4c","permalink":"http://vcg.isti.cnr.it/publication/2014/SCPCD14a/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/SCPCD14a/","section":"publication","summary":"","tags":null,"title":"Digital Fabrication Technologies for Cultural Heritage (STAR)","type":"publication"},{"authors":["Paul Lauga","Giuseppe Valenzise","Francesca De Simone","Frederic Dufaux","Francesco Banterle"],"categories":null,"content":"","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"fddfb45460b8bf00667a7fdcd2041686","permalink":"http://vcg.isti.cnr.it/publication/2014/DVLDB14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/DVLDB14/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstractThe goal of this paper is to assess whether existing solutions to expand low dynamic range (LDR) still images to high dynamic range (HDR) displays can apply to moving pictures. To this end, we conduct a subjective quality assessment test on four state-of-the-art expansion operators, using high-quality input LDR content. Our results show that, perhaps surprisingly, no temporal artifacts, such as flickering due to global illumination changes, are introduced applying frame-based algorithms. In addition, they confirm previous studies in that operators as simple as linear expansion can yield acceptable (or even excellent) quality of the HDR video.","tags":null,"title":"Dynamic Range Expansion of Video Sequences: a Subjective Quality Assessment Study","type":"publication"},{"authors":["Marco Di Benedetto","Fabio Ganovelli","marcos balsa Rodriguez","Alberto Jaspe Villanueva","Enrico Gobbetti","Roberto Scopigno"],"categories":null,"content":" http://www.exploremaps.org\n","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"5771eed0ecdca3a63ab39b2cb23dd776","permalink":"http://vcg.isti.cnr.it/publication/2014/DGBJGS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/DGBJGS14/","section":"publication","summary":"http://www.exploremaps.org We introduce a novel efficient technique for automatically transforming a generic renderable 3D scene into a simple graph representation named ExploreMaps, where nodes are nicely placed point of views, called probes, and arcs are smooth paths between neighboring probes. Each probe is associated with a panoramic image enriched with preferred viewing orientations, and each path with a panoramic video. Our GPU-accelerated unattended construction pipeline distributes probes so as to guarantee coverage of the scene while accounting for perceptual criteria before finding smooth, good looking paths between neighboring probes. Images and videos are precomputed at construction time with off-line photorealistic rendering engines, providing a convincing 3D visualization beyond the limits of current real-time graphics techniques. At run-time, the graph is exploited both for creating automatic scene indexes and movie previews of complex scenes and for supporting interactive exploration through a low-DOF assisted navigation interface and the visual indexing of the scene provided by the selected viewpoints. Due to negligible CPU overhead and very limited use of GPU functionality, real-time performance is achieved on emerging web-based environments based on WebGL even on low-powered mobile devices.","tags":null,"title":"eXploreMaps: Efficient Construction and Ubiquitous Exploration of Panoramic View Graphcs of Complex 3D Environments","type":"publication"},{"authors":["Paolo Cignoni","Nico Pietroni","Luigi Malomo","Roberto Scopigno"],"categories":null,"content":" Talk Slides ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"821171018041d7b9fc7d8b823e0ec447","permalink":"http://vcg.isti.cnr.it/publication/2014/CPMS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/CPMS14/","section":"publication","summary":"Mesh joinery is an innovative method to produce illustrative shape approxi- mations suitable for fabrication. Mesh joinery is capable of producing com- plex fabricable structures in an efficient and visually pleasing manner. We represent an input geometry as a set of planar pieces arranged to compose a rigid structure, by exploiting an efficient slit mechanism. Since slices are planar, to fabricate them a standard 2D cutting system is enough. We automatically arrange slices according to a smooth cross field defined over the surface. Cross fields allow representing global features that char- acterize the appearance of the shape. Slice placement conforms to specific manufacturing constraints. Talk Slides","tags":null,"title":"Field-Aligned Mesh Joinery","type":"publication"},{"authors":["Daniele Panozzo","Enrico Puppo","Marco Tarini","Olga Sorkine-Hornung"],"categories":null,"content":" [source code]\n[experimental data]\n","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"6340e8558cd86c5b71422c1ae35cc9a4","permalink":"http://vcg.isti.cnr.it/publication/2014/PPTS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/PPTS14/","section":"publication","summary":"We introduce frame fields, which are a non-orthogonal and non-unit-length generalization of cross fields. Frame fields represent smoothly varying linear transformations on tangent spaces of a surface. We propose an algorithm to create discrete, dense frame fields that satisfy a sparse set of constraints. By computing a surface deformation that warps a frame field into a cross field, we generalize existing quadrangulation algorithms to generate anisotropic and non-uniform quad meshes whose elements shapes match the frame field. With this, our framework enables users to control not only the alignment but also the density and anisotropy of the elements' distribution, resulting in high-quality adaptive quad meshing. [source code] [experimental data]","tags":null,"title":"Frame fields: Anisotropic and non-orthogonal cross fields","type":"publication"},{"authors":["Eliana Siotto","Marco Callieri","Paolo Pingi","Roberto Scopigno","Laura Benassi","Alice Parri","Denise La Monica","Andrea Ferrara"],"categories":null,"content":"","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"0e945f37cb813f69ecde163a78d66097","permalink":"http://vcg.isti.cnr.it/publication/2014/SCPSBPLF14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/SCPSBPLF14/","section":"publication","summary":"","tags":null,"title":"From the archival documentation to standardised web database and 3D models: the case study of the Camaldolese Abbey in Volterra (Italy) ","type":"publication"},{"authors":["Giuseppe Alemanno","Paolo Cignoni","Nico Pietroni","Federico Ponchio","Roberto Scopigno"],"categories":null,"content":" Talk Slides ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"37fd3e16c7bbf5535984c98e99678a82","permalink":"http://vcg.isti.cnr.it/publication/2014/ACPPS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/ACPPS14/","section":"publication","summary":"abstract We propose a technique to decompose a 3D digital shape into a set of interlocking pieces that are easy to be manufactured and assembled. The pieces are designed so that they can be represented as a simple height field and, therefore, they can be manufactured by common 3D printers without the usage of supporting material. The removal of the supporting material is often a burdensome task and may eventually damage the surface of the printed object. Our approach makes the final reproduction cheaper, accurate and suitable for the reproduction of tangible cultural heritages. Moreover, since the proposed technique decomposes the artwork in pieces, it also overcomes the working space limits of common printers. The decomposition of the input (high-resolution) triangular mesh is driven by a coarse polygonal base mesh (representing the target subdivision in pieces); the height fields defining each piece are generated by sampling distances along the normal of each face composing the base mesh. A innovative interlocking mechanism allows adjacent pieces to plug each other to compose the final shape. This interlocking mechanism is designed to preserve the height field property of the pieces and to provide a sufficient degree of grip to ensure the assembled structure shape to be compact and stable. We demonstrate the effectiveness of our approach and show its limitations with some practical reproduction examples. Talk Slides","tags":null,"title":"Interlocking pieces for printing tangible Cultural Heritage replicas","type":"publication"},{"authors":["Fabio Ganovelli","Massimiliano Corsini","Sumanta Pattanaik","Marco Di Benedetto"],"categories":null,"content":" ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"61fd0d06689e51806147fea08142cbb2","permalink":"http://vcg.isti.cnr.it/publication/2014/GCPD14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/GCPD14/","section":"publication","summary":"http://www.envymycarbook.com This book guides students in developing their own interactive graphics application. The authors show step by step how to implement computer graphics concepts and theory using the EnvyMyCar (NVMC) framework as a consistent example throughout the text. They use the WebGL graphics API to develop NVMC, a simple, interactive car racing game. Each chapter focuses on a particular computer graphics aspect, such as 3D modeling and lighting. The authors help students understand how to handle 3D geometric transformations, texturing, complex lighting effects, and more. This practical approach leads students to draw the elements and effects needed to ultimately create a visually pleasing car racing game.","tags":null,"title":"Introduction to Computer Graphics: a Practical Learning Approach","type":"publication"},{"authors":["Luca Benedetti","Holger Winnemoeller","Massimiliano Corsini","Roberto Scopigno"],"categories":null,"content":"","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"7a9e90dc1a333742088e37662fdc5528","permalink":"http://vcg.isti.cnr.it/publication/2014/BWCS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/BWCS14/","section":"publication","summary":"","tags":null,"title":"Painting with Bob: Assisted Creativity for Novices","type":"publication"},{"authors":["Denis Zorin","Nico Pietroni","Ashish Myles"],"categories":null,"content":" talk Slides Input data for our experiments Results of MIQ Results for BD Results for IGM Our Results ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"77e0c3ebbde2c0fba5291eccb54ea0e5","permalink":"http://vcg.isti.cnr.it/publication/2014/MPZ14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/MPZ14/","section":"publication","summary":"abstract p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Times; min-height: 14.0px} p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Times} We present a robust method for computing locally bijective global parametrizations aligned with a given cross-field. The singulari- ties of the parametrization in general agree with singularities of the field, except in a small number of cases when several additional cones need to be added in a controlled way. Parametric lines can be constrained to follow an arbitrary set of feature lines on the surface. Our method is based on constructing an initial quad patch partition using robust cross-field integral line tracing. This process is fol- lowed by an algorithm modifying the quad layout structure to en- sure that consistent parametric lengths can be assigned to the edges. For most meshes, the layout modification algorithm does not add new singularities; a small number of singularities may be added to resolve an explicitly described set of layouts. We demonstrate that our algorithm succeeds on a test data set of over a hundred meshes. talk Slides Here the results of our experiments: Input data for our experiments Results of MIQ Results for BD Results for IGM Our Results","tags":null,"title":"Robust Field-aligned Global Parametrization","type":"publication"},{"authors":["Fabrizio Costantino","Simone Durazzani","Daniele Poggi","Marco Callieri","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"ddf08df98eee02abb23909edd54d24e4","permalink":"http://vcg.isti.cnr.it/publication/2014/CDPCDS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/CDPCDS14/","section":"publication","summary":" ","tags":null,"title":"San Leonardo in Arcetri: innovazione tecnologica per la gestione integrata dei beni culturali","type":"publication"},{"authors":["Mara De Matteis","Matteo Dellepiane"],"categories":null,"content":" ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"27c6ea9cded641f05d4b2c27acf02e0a","permalink":"http://vcg.isti.cnr.it/publication/2014/DD14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/DD14/","section":"publication","summary":" ","tags":null,"title":"Site-specific Art and 3D: an Example of Spatial Analysis and Reconstruction","type":"publication"},{"authors":["Andrea Baldacci","Fabio Ganovelli","Massimiliano Corsini","Roberto Scopigno"],"categories":null,"content":" ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"1ef5c9e58ca3bc5b6580f4dfe9c67f45","permalink":"http://vcg.isti.cnr.it/publication/2014/BGCS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/BGCS14/","section":"publication","summary":" ","tags":null,"title":"Stereo-browsing from Calibrated Cameras","type":"publication"},{"authors":["Gianpaolo Palma","Monica Baldassarri","Maria Chiara Favilla","Roberto Scopigno"],"categories":null,"content":" ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"0e73aa13149bc82fa14f3b77257bf361","permalink":"http://vcg.isti.cnr.it/publication/2014/PBFS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/PBFS14/","section":"publication","summary":"Online publication \t \t Online kiosk","tags":null,"title":"Storytelling of a Coin Collection by Means of RTI Images: the Case of the Simoneschi Collection in Palazzo Blu","type":"publication"},{"authors":["Katarzyna Wilkosinska","Andreas Aderhold","Massimiliano Corsini","Yvonne Jung","Holger Graf","Arjan Kujiper"],"categories":null,"content":"","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"eab786d110df4cf11c8fdbb043fe0bce","permalink":"http://vcg.isti.cnr.it/publication/2014/AWCJGK14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/AWCJGK14/","section":"publication","summary":"","tags":null,"title":"The Common Implementation Framework as Service – Towards Novel Applications for Streamlined Presentation of 3D Content on the Web","type":"publication"},{"authors":["Marco Di Benedetto","Federico Ponchio","Luigi Malomo","Marco Callieri","Matteo Dellepiane","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"d7eec4259aa55321814625f45da3e935","permalink":"http://vcg.isti.cnr.it/publication/2014/DPMCDCS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/DPMCDCS14/","section":"publication","summary":"","tags":null,"title":"Web and mobile visualization for Cultural Heritage","type":"publication"},{"authors":null,"categories":null,"content":"Our fellow Francesco Banterle was appointed Editor in Chief of the Journal of Graphics Tools.\n","date":1359072e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1359072e3,"objectID":"ca3efa589c61d37a1ceed198882d7fe2","permalink":"http://vcg.isti.cnr.it/post/13-01-25-banterle-editor/","publishdate":"2013-01-25T00:00:00Z","relpermalink":"/post/13-01-25-banterle-editor/","section":"post","summary":"Our fellow Francesco Banterle was appointed Editor in Chief of the Journal of Graphics Tools.","tags":null,"title":"Francesco Banterle new Editor in Chief of the Journal of Graphics Tools","type":"post"},{"authors":["Gregorio Palmas","Nico Pietroni","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" Project Page Talk Slides ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"d90f162dfb9d87d025ad1057f484393e","permalink":"http://vcg.isti.cnr.it/publication/2013/PPCS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/PPCS13/","section":"publication","summary":"We propose a computer-assisted constraint-based methodology for virtual reassembly of Cultural Heritage (CH) artworks. Instead than focusing on automatic, unassisted re- assembly, we targeted the scenarios where the reconstruction process is not be based on shape properties only but it is build over the experience and intuition of a CH expert. Our purpose is therefore to design a flexible interactive system, based on the selection of a set of constraints which relates different fragments, according to the understanding and experience of the CH operator. Once the user has defined those constraints, the system searches for a suitable solution, using a global energy minimization strategy that considers simultaneously all the pieces involved in the reconstruction process. Additionally, our framework provides the possibility to work in a hierarchical way, mimicking the traditional physical procedure that archaeologists use to reassemble tangible fractured objects. The frameworks is designed to work even with fragments that could have been severely damaged or eroded. On those datasets, automatic approaches may often fail, since the fractured regions do not contain enough geometric information to infer the correct matches. We present some successful uses of our framework on real application scenarios. Project Page Talk Slides","tags":null,"title":"A computer-assisted constraint-based system for assembling fragmented objects","type":"publication"},{"authors":["Giorgio Marcias","Nico Pietroni","Daniele Panozzo","Enrico Puppo","Olga Sorkine"],"categories":null,"content":" Talk Slides Data Code ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"776cf8416d788a425e5ddb0229bb3156","permalink":"http://vcg.isti.cnr.it/publication/2013/MPPPS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/MPPPS13/","section":"publication","summary":"Geometric meshes that model animated characters must be designed while taking into account the deformations that the shape will undergo during animation. We analyze an input sequence of meshes with point-to-point correspondence, and we automatically produce a quadrangular mesh that fits well the input animation. We first analyze the local deformation that the surface undergoes at each point, and we initialize a cross field that remains as aligned as possible to the principal directions of deformation throughout the sequence. We then smooth this cross field based on an energy that uses a weighted combination of the initial field and the local amount of stretch. Finally, we compute a field-aligned quadrangulation with an off-the-shelf method. Our technique is fast and very simple to implement, and it significantly improves the quality of the output quad mesh and its suitability for character animation, compared to creating the quad mesh based on a single pose. We present experimental results and comparisons with a state-of-the-art quadrangulation method, on both sequences from 3D scanning and synthetic sequences obtained by a rough animation of a triangulated model. Talk Slides Data Code","tags":null,"title":"Animation-Aware Quadrangulation","type":"publication"},{"authors":["Matteo Dellepiane","Nicolo Dell Unto","Marco Callieri","Stefan Lindgren","Roberto Scopigno"],"categories":null,"content":" ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"be9b8753c115fc0e46b99394b6047a98","permalink":"http://vcg.isti.cnr.it/publication/2013/DDCLS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/DDCLS13/","section":"publication","summary":" ","tags":null,"title":"Archeological excavation monitoring using dense stereo matching techniques","type":"publication"},{"authors":["Marco Callieri","Chiara Leoni","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"3012a1b1650c2b5c1d04eed6093cb8a2","permalink":"http://vcg.isti.cnr.it/publication/2013/CLDS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/CLDS13/","section":"publication","summary":" ","tags":null,"title":"Artworks narrating a story: a modular framework for the integrated presentation of three-dimensional and textual contents","type":"publication"},{"authors":["Matteo Dellepiane","Emanuele Cavarretta","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"1e7dc3bc6e60c57c25c71ca60634d5f4","permalink":"http://vcg.isti.cnr.it/publication/2013/DCCS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/DCCS13/","section":"publication","summary":" ","tags":null,"title":"Assisted Multi-view Stereo reconstruction ","type":"publication"},{"authors":["Erik Reinhard","Hans-Peter Seidel","Ahmet Oguz Akyuz","Francesco Banterle","Alessandro Artusi","Tania Pouli"],"categories":null,"content":"","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"3f6576bf21239105a9cf961501cb7dc3","permalink":"http://vcg.isti.cnr.it/publication/2013/PABASR13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/PABASR13/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstractHigh dynamic range images require tone reproduction to match the range of values to the capabilities of the display. For computational reasons as well as absence of fully calibrated imagery, rudimentary color reproduction is often added as a post-processing step rather than integrated into the tone reproduction algorithm. However, in the general case this currently requires manual parameter tuning, although for some global tone reproduction operators, parameter settings can be inferred from the tone curve. We present a novel and fully automatic saturation correction technique, suitable for any tone reproduction operator, which exhibits better color reproduction than the state-of-the-art and we validate its comparative effectiveness through psychophysical experimentation.","tags":null,"title":"Color Correction for Tone Reproduction","type":"publication"},{"authors":["Nicolo Dell Unto","Daniele Ferdani","Anne-Marie Leander","Matteo Dellepiane","Marco Callieri","Stefan Lindgren"],"categories":null,"content":" ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"402cd670a0f62c02980ccee5b39e232b","permalink":"http://vcg.isti.cnr.it/publication/2013/DFLDCL13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/DFLDCL13/","section":"publication","summary":" ","tags":null,"title":"Digital reconstruction and visualization in archaeology Case-study drawn from the work of the Swedish Pompeii Project ","type":"publication"},{"authors":["Cristian Brognara","Massimiliano Corsini","Matteo Dellepiane","Andrea Giachetti"],"categories":null,"content":"","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"e6e109b79354c795e4d088a72722fa51","permalink":"http://vcg.isti.cnr.it/publication/2013/BCDG13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/BCDG13/","section":"publication","summary":"","tags":null,"title":"Edge Detection on Polynomial Texture Maps","type":"publication"},{"authors":["Francesco Banterle","Marco Callieri","Matteo Dellepiane","Massimiliano Corsini","Fabio Pellacini","Roberto Scopigno"],"categories":null,"content":"here\nPiccante\n","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"d68c07fbca43f8477b8607ed3ffcf658","permalink":"http://vcg.isti.cnr.it/publication/2013/BCDCPS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/BCDCPS13/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstractIn this paper, we present EnvyDepth, an interface for recovering local illumination from a single HDR environment map. In EnvyDepth, the user quickly indicates strokes to mark regions of the environment map that should be grouped together in a single geometric primitive. From these annotated strokes, EnvyDepth uses edit propagation to create a detailed collection of virtual point lights that reproduce both the local and the distant lighting effects in the original scene. When compared to the sole use of the distant illumination, the added spatial information better reproduces a variety of local effects such as shadows, highlights and caustics. Without the effort needed to create precise scene reconstructions, EnvyDepth annotations take only tens of seconds to produce a plausible lighting without visible artifacts. This is easy to obtain even in the case of complex scenes, both indoors and outdoors. The generated lighting environments work well in a production pipeline since they are efficient to use and able to produce accurate renderings.\n\n\n\n\n\nErrata: the Amsterdam Road example is not in Amsterdam but in Hague.\n\nSoftwareA first version of EnvyDepth can be now dowloaded here; spiced by Piccante. Tutorial Video","tags":null,"title":"EnvyDepth: An Interface for Recovering Local Natural Illumination from Environment Maps","type":"publication"},{"authors":["Massimiliano Corsini","Matteo Dellepiane","Fabio Ganovelli","Riccardo Gherardi","Andrea Fusiello","Roberto Scopigno"],"categories":null,"content":" ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"b77c820222c1796384efa57ecfa55197","permalink":"http://vcg.isti.cnr.it/publication/2013/CDGGFS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/CDGGFS13/","section":"publication","summary":" ","tags":null,"title":"Fully Automatic Registration of Image Sets on Approximate Geometry","type":"publication"},{"authors":["Luca Benedetti","Massimiliano Corsini","Matteo Dellepiane","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"eb79d2be8ee8b8eaf15db0e59f64cdbb","permalink":"http://vcg.isti.cnr.it/publication/2013/BCDCS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/BCDCS13/","section":"publication","summary":"","tags":null,"title":"GAIL: Geometry-aware Automatic Image Localization","type":"publication"},{"authors":["Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"6ded3181a5f6076fee180a9cc6f281cf","permalink":"http://vcg.isti.cnr.it/publication/2013/DS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/DS13/","section":"publication","summary":" ","tags":null,"title":"Global refinement of image-to-geometry registration for color projection","type":"publication"},{"authors":["Vassilios Solachidis","Emanuele Maiorana","Patrizio Campisi","Francesco Banterle"],"categories":null,"content":"","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"4809fe36b37156de2291f15ca49847f7","permalink":"http://vcg.isti.cnr.it/publication/2013/SMCB13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/SMCB13/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstractThe present paper proposes a novel watermarking scheme specifically designed for high dynamic range (HDR) images. The employed embedding strategy is based on a decomposition of the original HDR representation into multiple low dynamic range (LDR) images by means of a bracketing process. After having inserted the selected watermark into each LDR component, the final output is generated by combining the available contributions into a single HDR object. By exploiting some of the well studied properties of digital watermarking for standard LDR images, our approach is able to generate a watermarked HDR image visually equivalent to the original one, while allowing to detect the embedded information in both the marked HDR image and in its LDR counterpart, obtained through tone-mapping operators or by extracting a specific luminance range of interest from it. Several results obtained from an extensive set of experimental tests are reported to testify the effectiveness of the proposed scheme.","tags":null,"title":"HDR Image Watermarking based on Bracketing Decomposition","type":"publication"},{"authors":["Lucia Arbace","Sonnino Elisabetta","Marco Callieri","Matteo Dellepiane","M. Fabbri","Iaccarino Idelson Antonio","Roberto Scopigno"],"categories":null,"content":" ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"b957f79433069559780352b5beb99b2e","permalink":"http://vcg.isti.cnr.it/publication/2013/AECDFAS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/AECDFAS13/","section":"publication","summary":" ","tags":null,"title":"Innovative uses of 3D digital technologies to assist the restoration of a fragmented terracotta statue","type":"publication"},{"authors":["Guido Ranzuglia","Marco Callieri","Matteo Dellepiane","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"3f03868fc1f83a718c490bbfc5298e46","permalink":"http://vcg.isti.cnr.it/publication/2013/RCDCS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/RCDCS13/","section":"publication","summary":"","tags":null,"title":"MeshLab as a complete tool for the integration of photos and color with high resolution 3D geometry data","type":"publication"},{"authors":["Massimiliano Corsini","Mohamed-Chaker Larabi","Guillaume Lavoué","Oldrich Petrik","Libor Vasa","Kai Wang"],"categories":null,"content":"","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"fb702f3da8cf7d28dd68b009be901c1d","permalink":"http://vcg.isti.cnr.it/publication/2013/CLLPVW13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/CLLPVW13/","section":"publication","summary":"","tags":null,"title":"Perceptual Metrics for Static and Dynamic Triangle Meshes","type":"publication"},{"authors":["Paolo Brivio","Luca Benedetti","Marco Tarini","Federico Ponchio","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"youTube videos\n","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"dd47737c27f0490d6919014ed094889d","permalink":"http://vcg.isti.cnr.it/publication/2013/BBTPCS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/BBTPCS13/","section":"publication","summary":"abstract\n\n\nAbstract\nPhotoCloud is a real-time client-server system for interactive visualization and exploration of large datasets comprising thousands of calibrated 2D photographs of a scene and a complex 3D description of the scene. The system is not tailored to any specific data acquisition process; it aims at generality and flexibility. PhotoCloud achieves scalability through a multiresolution dynamic hierarchical representation of the data, which is remotely stored and accessed by the client through an efficient cache system. The system includes a compact image browser and a multiresolution model renderer. PhotoCloud employs iconic visualization of the images in the 3D space and projects images onto the 3D scene on the fly. Users can navigate the 2D and 3D spaces with smooth, integrated, seamless transitions between them. A study with differently skilled users confirms PhotoCloud's effectiveness and communication power. The Web extras (youTube videos) are videos demonstrating PhotoCloud, a real-time client-server system for interactive exploration of large datasets comprising 2D photos and 3D models","tags":null,"title":"PhotoCloud: interactive remote exploration of large 2D-3D datasets","type":"publication"},{"authors":["Nicolo Dell Unto","Matteo Dellepiane","Marco Callieri","Anne-Marie Leander","Stefan Lindgren","Carolina Larsson"],"categories":null,"content":" ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"60948ec9fa93068314d511eebbef3744","permalink":"http://vcg.isti.cnr.it/publication/2013/DDCLLL13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/DDCLLL13/","section":"publication","summary":" ","tags":null,"title":"Pompei revived: Scanning Mission - Insula V 1","type":"publication"},{"authors":["Marco Tarini","Claudio Silva","Enrico Puppo","Nico Pietroni","Bruno Lévy","David Bommes","Denis Zorin"],"categories":null,"content":"","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"946462abd76bab2a5c4daf4e4a086743","permalink":"http://vcg.isti.cnr.it/publication/2013/BLPPSTZ13a/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/BLPPSTZ13a/","section":"publication","summary":"Triangle meshes have been nearly ubiquitous in computer graphics, and a large body of data structures and geometry processing algorithms based on them has been developed in the literature. At the same time, quadrilateral meshes, especially semi-regular ones, have advantages for many applications, and significant progress was made in quadrilateral mesh generation and processing during the last several years. In this survey we discuss the advantages and problems of techniques operating on quadrilateral meshes, including surface analysis and mesh quality, simplification, adaptive refinement, alignment with features, parametrisation and remeshing.","tags":null,"title":"Quad-Mesh Generation and Processing: A Survey","type":"publication"},{"authors":["Francesco Banterle","Alan Chalmers","Roberto Scopigno"],"categories":null,"content":"","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"640c2091819b1442ef298bd4b5a7b183","permalink":"http://vcg.isti.cnr.it/publication/2013/BCS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/BCS13/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstractIn this paper, we present a novel parallel implementation of a high fidelity inverse tone mapping operator. Our method makes use of point based graphics to accelerate density estimation, and multi-core CPUs for extracting light sources. We show that our method can achieve real-time performance on a lower-end graphics card, with minimum loss of quality.","tags":null,"title":"Real-Time High Fidelity Inverse Tone Mapping for Low Dynamic Range Content","type":"publication"},{"authors":["Marco Tarini"],"categories":null,"content":"","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"8b7c9e6f12ae7adcdb3b6a6aa344150a","permalink":"http://vcg.isti.cnr.it/publication/2013/Tar13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/Tar13/","section":"publication","summary":"Project Page","tags":null,"title":"Sala del Grechetto: ricostruzione virtuale","type":"publication"},{"authors":["Gianpaolo Palma","Nicola Desogus","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"a6ed07c3b1bd0d286f29714a17871549","permalink":"http://vcg.isti.cnr.it/publication/2013/PDCS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/PDCS13/","section":"publication","summary":"This paper presents an algorithm for the estimation of the Surface Light Field using video sequences acquired moving the camera around the object. Unlike other state of the art methods, it does not require a uniform sampling density of the view directions, but it is able to build an approximation of the Surface Light Field starting from a biased video acquisition: dense along the camera path and completely missing in the other directions. The main idea is to separate the estimation of two components: the diffuse color, computed using statistical operations that allow the estimation of a rough approximation of the direction of the main light sources in the acquisition environment; the other residual Surface Light Field effects, modeled as linear combination of spherical functions. From qualitative and numerical evaluations, the final rendering results show a high fidelity and similarity with the input video frames, without ringing and banding effects.","tags":null,"title":"Surface Light Field from Video Acquired in Uncontrolled Settings","type":"publication"},{"authors":["Chiara Leoni","Marco Callieri","Matteo Dellepiane","Roberto Rosselli Del Turco","Daniel O Donnell"],"categories":null,"content":" ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"7145b382ab6c2d066a08394ed9a23717","permalink":"http://vcg.isti.cnr.it/publication/2013/LCDRO13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/LCDRO13/","section":"publication","summary":" ","tags":null,"title":"The Dream and the Cross: bringing 3D content in a digital edition","type":"publication"},{"authors":null,"categories":null,"content":"Our paper Adaptive Quad Patches: an Adaptive Regular Structure for Web Distribution and Adaptive Rendering of 3D Models won the Best Paper Award of the 17th edition of ACM International Web3D Conference.\n","date":1344124800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1344124800,"objectID":"20964ef51842fa7715944b0191a6b198","permalink":"http://vcg.isti.cnr.it/post/12-08-05-best-paper/","publishdate":"2012-08-05T00:00:00Z","relpermalink":"/post/12-08-05-best-paper/","section":"post","summary":"Our paper Adaptive Quad Patches: an Adaptive Regular Structure for Web Distribution and Adaptive Rendering of 3D Models won the Best Paper Award of the 17th edition of ACM International Web3D Conference.","tags":null,"title":"Best Paper Award","type":"post"},{"authors":null,"categories":null,"content":"We have recently scanned the Capsella Samagher, a small but incredibly precious artwork conserved at the National Archaeological Museum in Venice. It is a small devotional ivory casket, with carved faces depicting scenes from early Christianity (an early representation of St. Peter Basilica in Rome). This scanning is part of a restoration and musealization project.\n","date":1338508800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1338508800,"objectID":"df46f35d6667191473c18d3c4191bc6c","permalink":"http://vcg.isti.cnr.it/post/12-06-01-scanning-venice/","publishdate":"2012-06-01T00:00:00Z","relpermalink":"/post/12-06-01-scanning-venice/","section":"post","summary":"We have recently scanned the Capsella Samagher, a small but incredibly precious artwork conserved at the National Archaeological Museum in Venice. It is a small devotional ivory casket, with carved faces depicting scenes from early Christianity (an early representation of St.","tags":null,"title":"3D scanning in Venice","type":"post"},{"authors":null,"categories":null,"content":"Roberto Scopigno has been appointed Editor in Chief of ACM JOCCH - Journal of Computing and Cultural Heritage for the term 2012-2015.\nACM JOCCH, established in 2008, is the main international journal on the theme of the innovative methodologies and uses of Information and Communication Technologies (ICT) in support of Cultural Heritage.\n","date":1335830400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1335830400,"objectID":"9a9115b766f607f9dfdf351a1bbb0add","permalink":"http://vcg.isti.cnr.it/post/12-05-01-scopigno-editor-JOCCH/","publishdate":"2012-05-01T00:00:00Z","relpermalink":"/post/12-05-01-scopigno-editor-JOCCH/","section":"post","summary":"Roberto Scopigno has been appointed Editor in Chief of ACM JOCCH - Journal of Computing and Cultural Heritage for the term 2012-2015.\nACM JOCCH, established in 2008, is the main international journal on the theme of the innovative methodologies and uses of Information and Communication Technologies (ICT) in support of Cultural Heritage.","tags":null,"title":"Roberto Scopigno appointed Editor in Chief of ACM Journal of Computing and Cultural Heritage","type":"post"},{"authors":["Eliana Siotto","Marco Callieri","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":"","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"2e39d809bd76de755636c8d6ac441f02","permalink":"http://vcg.isti.cnr.it/publication/2012/SCDS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/SCDS12/","section":"publication","summary":"","tags":null,"title":"3D model of the sarcophagus of Ulpia Domnina: rendering of stored ancient color and virtual revival of original polychromy","type":"publication"},{"authors":["Giovanni Pintore","Enrico Gobbetti","Fabio Ganovelli","Paolo Brivio"],"categories":null,"content":"","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"edf1f2b589234f07a2c2ab235a832370","permalink":"http://vcg.isti.cnr.it/publication/2012/PGGB12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/PGGB12/","section":"publication","summary":"We report about the 3DNSITE system, a client-server 3D visualization tool which streams and visualizes tridimensional hybrid data on portable devices to support crisis managers and first responders during simulation and training of emergency operations. In this peculiar context is very important to share the same, large data in a web-based environment, accessing it through portable devices. Here it has to be visualized using simple and immediate interfaces, since the specific end-users are not necessary skilled with virtual reality and 3D objects interaction. The dataset itself is not static as well as in general purpose web based 3D browsers, but dynamic and changing during the evolution of the real or simulated crisis. According with these constraints, we propose a system which simplifies location recognition and visualizes dynamically updated pictorial data inside a virtual 3D environment. Our system is integrated in a more complex and articulated training and decision framework for emergency operations. 3DNSITE implements a novel aided intuitive interface designed to exploit touchscreen devices to easily navigate between 3D aligned photographs. Unlike common popular 3D maps browsers, the free 3D navigation through the whole 3D model is always supported, assuring an interactive representation of the scenario also when no photo is available. 3DNSITE enhances already presented state-of-the-art methods for managing the data, achieving an excellent scalability on portable devices in terms of both performance and amount of data. The system also scales over different devices according to their hardware resources and the available network bandwidth, exploiting a state-of-the-art multiresolution representation for the 3D model and a multi-level cache system, employed to web access both the images and the hierarchical 3D model structure.","tags":null,"title":"3DNSITE: A NETWORKED INTERACTIVE 3D VISUALIZATION SYSTEM TO SIMPLIFY LOCATION RECOGNITION IN CRISIS MANAGEMENT","type":"publication"},{"authors":["Francesco Banterle","Massimiliano Corsini","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"link to the official journal\nPiccante\nOpenGL ES 2.0 shaders source code and data\n","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"3b401df10c6955ad82f2f313f87a1284","permalink":"http://vcg.isti.cnr.it/publication/2012/BCCS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BCCS12/","section":"publication","summary":"abstract\n\n\n\n\n\n\n\n\n\nfunction log(msg) { var textarea = document.getElementById(\"log-area\"); textarea.innerHTML += (msg + \"\\n\"); textarea.scrollTop = textarea.scrollHeight; }\n$(document).ready(function() { $( \"#sliderSigmaS\" ).slider({ range: \"min\", min: 1, max: 100, value: 1, slide: function(event, ui){ $(\"#paraS\").text(ui.value); }, change: function(event, ui){ $(\"#paraS\").text(ui.value); } });\n$( \"#sliderSigmaR\" ).slider({ range: \"min\", min: 1, max: 100, value: 1, slide: function(event, ui){ $(\"#paraR\").text(ui.value); }, change: function(event, ui){ $(\"#paraR\").text(ui.value); } }); });\n\nSpiderGL.openNamespace();\nfunction CanvasHandler() { }\nCanvasHandler.prototype = {\n///////////////////////////////////////////////////////////////////////////////////// onInitialize : function () { var gl = this.ui.gl;\nvar quadPositions = new Float32Array([ -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0 ]);\nvar quadTexcoords = new Float32Array([ 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 1.0, 1.0 ]);\nvar quad = new SglModel(gl, { data : { vertexBuffers : { \"positionBuffer\" : { typedArray : quadPositions}, \"texcoordBuffer\" : { typedArray : quadTexcoords} }, indexBuffers : { } }, access : { vertexStreams : { \"position\" : { buffer : \"positionBuffer\", size : 2, type : SGL_FLOAT32, stride : 2 * SGL_SIZEOF_FLOAT32, offset : 0 }, \"texcoord\" : { buffer : \"texcoordBuffer\", size : 2, type : SGL_FLOAT32, stride : 2 * SGL_SIZEOF_FLOAT32, offset : 0 } }, primitiveStreams : { \"triangles\" : { mode : SGL_TRIANGLE_STRIP, first : 0, count : 4 //number of verticies } } }, semantic : { bindings : { \"COMMON\" : { vertexStreams : { \"POSITION\" : [ \"position\" ], \"TEXCOORD\": [ \"texcoord\" ] }, primitiveStreams : { \"FILL\" : [ \"triangles\" ] } } }, chunks : { \"chunk0\" : { techniques : { \"COMMON\" : { binding : \"COMMON\" } } } } }, logic : { parts : { \"main\" : { chunks : [ \"chunk0\" ] } } } }); this.quad = quad;\nvar fsQuad = new SglFragmentShader(gl,\"\\ precision highp float; \\n\\ \\n\\ uniform sampler2D sTexture;\\n\\ uniform sampler2D sTextureSamples; \\n\\ varying vec2 vTexcoord; \\n\\ uniform float scaleX, scaleY, scaleY2, sigma_r2, sigma_s2;\\n\\ \\n\\ \\n\\ void main(void) \\n\\ { \\n\\ vec3 colorRef = texture2D(sTexture, vTexcoord).xyz; \\n\\ vec3 color = vec3(0.0,0.0,0.0);\\n\\ float yFetch = vTexcoord.y*scaleY2;\\n\\ float weight = 0.0;\\n\\ for(int i=0;i","tags":null,"title":"A Low-Memory, Straightforward and Fast Bilateral Filter Through Subsampling in Spatial Domain","type":"publication"},{"authors":["Daniele Bernabei","Ajit Hakke Patil","Francesco Banterle","Marco Di Benedetto","Fabio Ganovelli","Sumanta Pattanaik","Roberto Scopigno"],"categories":null,"content":"","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"8eec6b191e1a41dcae1900544dea008b","permalink":"http://vcg.isti.cnr.it/publication/2012/BHBDGPS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BHBDGPS12/","section":"publication","summary":"","tags":null,"title":"A Parallel Architecture for Interactive Rendering of Scattering and Refraction Effects","type":"publication"},{"authors":["Gianpaolo Palma","Marco Callieri","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"d8d7d807eeef3e895178f9184a46c0f1","permalink":"http://vcg.isti.cnr.it/publication/2012/PCDS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/PCDS12/","section":"publication","summary":"We present a statistical method for the estimation of the Spatially Varying Bidirectional Reflectance Distribution Function (SVBRDF) of an object with complex geometry, starting from video sequences acquired with fixed but general lighting conditions. The aim of this work is to define a method that simplifies the acquisition phase of the object surface appearance and allows to reconstruct an approximated SVBRDF. The final output is suitable to be used with a 3D model of the object to obtain accurate and photo-realistic renderings. The method is composed by three steps: the approximation of the environment map of the acquisition scene, using the same object as a probe; the estimation of the diffuse color of the object; the estimation of the specular components of the main materials of the object, by using a Phong model. All the steps are based on statistical analysis of the color samples projected by the video sequences on the surface of the object. Although the method presents some limitations, the trade-off between the easiness of acquisition and the obtained results makes it useful for practical applications.","tags":null,"title":"A Statistical Method for SVBRDF Approximation from Video Sequences in General Lighting Conditions","type":"publication"},{"authors":["Marco Di Benedetto","Fabio Ganovelli","marcos balsa Rodriguez","Fabio Marton","Enrico Gobbetti"],"categories":null,"content":" ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"febb2d3d2c3e20f7861bee8a9318629a","permalink":"http://vcg.isti.cnr.it/publication/2012/GMBGD12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/GMBGD12/","section":"publication","summary":"We introduce an approach for efficient distribution and adaptive rendering of 3D mesh models supporting a simple quad parameterization. Our method extends and combines recent results in geometric processing, real-time rendering, and web programming. In particular: we exploit recent results on surface reconstruction and isometric parametrization to transform point clouds into two-manifold meshes whose parametrization domain is a small collection of 2D square regions; we encode the resulting parameterized meshes into a very compact multiresolution structures composed of variable resolution quad patches whose geometry and texture is stored in a tightly packed texture atlas; we adaptively stream and render variable resolution shape representations using a GPU-accelerated adaptive tessellation algorithm with negligible CPU overhead. Real-time performance is achieved on portable GPU platforms using OpenGL, as well as on exploiting emerging web-based environments based on WebGL. Promising applications of the technology range from the automatic creation of rapidly renderable objects for games to the set-up of browsable 3D models repositories in the web that will be accessible by upcoming generation of WebGL-enabled web browers","tags":null,"title":"ADAPTIVE QUAD PATCHES: AN ADAPTIVE REGULAR STRUCTURE FOR WEB DISTRIBUTION AND ADAPTIVE RENDERING OF 3D MODELS","type":"publication"},{"authors":["Francesco Banterle","Roberto Scopigno"],"categories":null,"content":"","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"14d62aae39e3a08bb45174ce57d763a2","permalink":"http://vcg.isti.cnr.it/publication/2012/BS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BS12/","section":"publication","summary":"abstract\n\n\n\n\n\nSource code and binaries soon!\nAbstract In this paper, we present BoostHDR, a novel method for compressing high dynamic range (HDR) images. The algorithm leverages on a novel segmentation-based tone mapping operator (TMO) which relaxes the no seams constraint. Our method can work with both JPEG and JPEG2000 encoders. Moreover, it provides better results compared to the state of the art in HDR images compression algorithms in terms of bit per pixels (bpp), and visual quality using objective metrics. Keywords: HDR Imaging, HDR Image Compression","tags":null,"title":"BoostHDR: A novel backward-compatible method for HDR images","type":"publication"},{"authors":["Luca Benedetti","Massimiliano Corsini","Paolo Cignoni","Marco Callieri","Roberto Scopigno"],"categories":null,"content":"","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"2c9ffcd659b2780eba61089a09cb0807","permalink":"http://vcg.isti.cnr.it/publication/2012/BCCCS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BCCCS12/","section":"publication","summary":"","tags":null,"title":"Color to gray conversions in the context of stereo matching algorithms","type":"publication"},{"authors":["Marco Tarini"],"categories":null,"content":" link to the homepages\nonline\n","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"f0352da73f6861c7ad77dae549b16302","permalink":"http://vcg.isti.cnr.it/publication/2012/Tar12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/Tar12/","section":"publication","summary":"link to the homepages Abstract A simple rendering method to avoid vertex seams in cylindrical and toroidal UV mappings used for texture mapping is presented. (A vertex seam is a vertex duplication of a polygonal mesh with different texture coordinates assigned to the two geometrically coinciding copies.) As a result, the method leads to simpler, leaner, replication-free data structures. Is also allows for a higher degree of proceduralism in generation of texture coordinates. The method is general, trivial to implement (exhaustive pseudocode is provided), very low in cost on resources (with a virtually null impact on performance), and it leverages only basic mechanisms widely available in most GPU implementations. An open-source implementation is available online.","tags":null,"title":"Cylindrical and Toroidal Parameterizations Without Vertex Seams","type":"publication"},{"authors":["Francesco Banterle","Alessandro Artusi","Elena Sikudova","Thomas Edward William Bashford-Rogers","Patrick Ledda","Marina Bloj","Alan Chalmers"],"categories":null,"content":"HDR Toolbox\n","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"ecc767680996c4d89ce17bb73c9a01d7","permalink":"http://vcg.isti.cnr.it/publication/2012/BASBLBC12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BASBLBC12/","section":"publication","summary":"abstract\n\n\n\n\n\nSource code in the HDR Toolbox (BanterleTMO.m)\nAbstract In this paper we present a new technique for the display of High Dynamic Range (HDR) images on Low Dynamic Range (LDR) displays. The described process has three stages. First, the input image is segmented into luminance zones. Second, the tone mapping operator (TMO) that performs better in each zone is automatically selected. Finally, the resulting tone mapping (TM) outputs for each zone are merged, generating the final LDR output image. To establish the TMO that performs better in each luminance zone we conducted a preliminary psychophysical experiment using a set of HDR images and six different TMOs. We validated our composite technique on several (new) HDR images and conducted a further psychophysical experiment, using an HDR display as reference, that establishes the advantages of our hybrid three-stage approach over a traditional individual TMO.\n\n\n\n\n\nSchematic description of our Framework. First, the HDR input image is segmented into luminance zones and a zone map is created. Second, the optimal TMO for each zone is applied on the whole input image generating different output images (one for each zone). Finally the tone mapped images are merged and the final output is generated. (For visualization purposes we only show the specific zone tone mapped in the Tone Mapped Zones image on the right.)","tags":null,"title":"Dynamic Range Compression by Differential Zone Mapping Based on Psychophysical Experiments","type":"publication"},{"authors":["Massimiliano Corsini","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"bd5d3e8b449cf96b1032fc1b7834e90f","permalink":"http://vcg.isti.cnr.it/publication/2012/CCS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/CCS12/","section":"publication","summary":" ","tags":null,"title":"Efficient and Flexible Sampling with Blue Noise Properties of Triangular Meshes","type":"publication"},{"authors":["Matteo Dellepiane","Ricardo Marroquim","Marco Callieri","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"9dad4ec64283d5b7a1133ca366f4bb6b","permalink":"http://vcg.isti.cnr.it/publication/2012/DMCCS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/DMCCS12/","section":"publication","summary":" ","tags":null,"title":"Flow-Based Local Optimization for Image-to-Geometry Projection","type":"publication"},{"authors":["Frederic Larue","Marco Di Benedetto","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"437da928bd23ee8e27535e235cdc804d","permalink":"http://vcg.isti.cnr.it/publication/2012/LDDS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/LDDS12/","section":"publication","summary":" ","tags":null,"title":"From the Digitization of Cultural Artifacts to the Web Publishing of Digital 3D Collections: an Automatic Pipeline for Knowledge Sharing","type":"publication"},{"authors":["Jaime Kaminski","Karina Rodriguez Echavarria","David Arnold","Gianpaolo Palma","Roberto Scopigno","Marc Proesmans","James Stevenson"],"categories":null,"content":"","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"206a88438e56a91eeb7df556f1cf9afd","permalink":"http://vcg.isti.cnr.it/publication/2012/KRAPSPS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/KRAPSPS12/","section":"publication","summary":"","tags":null,"title":"Insourcing, outsourcing and crowdsourcing 3D collection formation: perspectives for cultural heritage sites","type":"publication"},{"authors":["Giuseppe Maraziti","Tiziana Loni","Maria F. Zini","Marco Callieri","Raluca Mihaela Andrei","Monica Zoppè"],"categories":null,"content":" ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"b9c3e5b58f6a8dd79abb91e9c16ea391","permalink":"http://vcg.isti.cnr.it/publication/2012/ACZLMZ12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/ACZLMZ12/","section":"publication","summary":" ","tags":null,"title":"Intuitive representation of surface properties of biomolecules using BioBlender","type":"publication"},{"authors":["Paolo Brivio","Marco Tarini","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"bcf7d2130decfdd9b2a5fbd3dcfa3fad","permalink":"http://vcg.isti.cnr.it/publication/2012/BTCS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BTCS12/","section":"publication","summary":" ","tags":null,"title":"Joint Interactive Visualization of 3D Models and Pictures in Walkable Scenes","type":"publication"},{"authors":["Laura Benassi","Alice Parri","Eliana Siotto","Marco Callieri","Paolo Pingi","Roberto Scopigno"],"categories":null,"content":"","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"73138b4ae8549a5caa45c0b3ee37bb24","permalink":"http://vcg.isti.cnr.it/publication/2012/BPSCPS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BPSCPS12/","section":"publication","summary":"","tags":null,"title":"Knowledge, science and enhancement of historical decaying buildings in Tuscany. The ArTeSalVa project","type":"publication"},{"authors":["Tobias Ritschel","Rafal Mantiuk","Diego Gutierrez","Elmar Eisemann","Piotr Didyk","Tunc Aydin","Alessandro Artusi","Francesco Banterle"],"categories":null,"content":"","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"865f1543d4541e6a5e9e04ee8f164c64","permalink":"http://vcg.isti.cnr.it/publication/2012/BAADEGMR12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BAADEGMR12/","section":"publication","summary":"abstract\n\n\n\n\nRetargeting is a process through which an image/a video is adapted from the display device for which it was meant (target display) to another one (retarget display). The retarget display has different features from the target one such as: dynamic range, discretization levels, color gamut, multi-view (3D), refresh rate, spatial resolution... This is a very relevant and hot topic in graphics, given the increasing number of display devices, from large, high-contrast screens to small cell phones with limited dynamic range; a lot of techniques are being published in different venues, and it's simply very hard to keep up. For instance, one of the few cases for which retargeting can be potentially straightforward is when adapting images from a larger display (in term of resolution) to a smaller one with the same aspect ratio: a low-pass filter followed by downsampling can then achieve good quality results. However, for most cases retargeting can be an ill-posed problem, such as when displaying Low Dynamic Range (LDR) or 8-bit content on High Dynamic Range (HDR) displays. Such a problem requires the retargeting algorithm to generate new content which is missing in the input image/frame. In this course, we will present the latest solutions and techniques for retargeting images along various dimensions such as dynamic range, colors, temporal and spatial resolutions, and offer for the first time a much-needed holistic view of the field. Moreover, we are going to show how to measure and analyze the changes applied to an image/video in terms of quality using both (subjective) psychophysical experiments and (objective) computational metrics. The course should be of interest to anyone involved in graphics in its broader sense, given the almost unavoidable need to retarget results to different devices: from developer that are interested to implement retargeting techniques, to users that just need an overall perspective, for researchers fully engaged in developing multi-dimensional retargeting techniques, for whom this course will serve as a solid background for future algorithms.\n\n\n\nSyllabus:\nIntroduction by Francesco Banterle Dynamic Range Retargeting: Tone Mapping by Rafal Mantiuk Dynamic Range Retargeting: Cornsweet Illusion and Glare in Tone Mapping by Tobias Ritschel Dynamic Range Retargeting: The Color Issue by Alessandro Artusi Dynamic Range Retargeting: Reverse/Inverse Tone Mapping by Francesco Banterle Spatial Image Retargeting by Diego Gutierrez Temporal Image Retargeting by Elmar Eisemann and Tobias Ritschel Quality Metrics by Tunc Aydin Stereo Retargeting by Piotr Didyk","tags":null,"title":"Mapping images to target devices: spatial, temporal, stereo, tone, and color","type":"publication"},{"authors":["Fabio Ganovelli","Roberto Scopigno"],"categories":null,"content":" ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"82a850a33c4471b725636ebd0053e540","permalink":"http://vcg.isti.cnr.it/publication/2012/GS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/GS12/","section":"publication","summary":"OCME (Out-of-Core Mesh Editing) is a novel data-structure and related algorithms for out-of-core editing of large meshes. OCME uses a hashed multigrid where the triangles are inserted on the base of their size and position. This choice allows a rapid access and, on average, a constant construction time per triangle. Unlike previous approaches, no explicit hierarchy is maintained and therefore insertion/modification/deletion of data does not require costly refitting procedures. OCME stores attributes locally, for example it allows to assign vertex color only to a small subparts of the dataset, and naturally handles multiple-scale datasets.","tags":null,"title":"OCME: out-of-core Mesh Editing Made Practical","type":"publication"},{"authors":["Paolo Brivio","Marco Tarini","Federico Ponchio","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"278ec9fb620c0c80c58f59e6968225cd","permalink":"http://vcg.isti.cnr.it/publication/2012/BTPCS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BTPCS12/","section":"publication","summary":"","tags":null,"title":"PileBars: Scalable Dynamic Thumbnail Bars","type":"publication"},{"authors":["David Bommes","Bruno Lévy","Nico Pietroni","Enrico Puppo","Claudio Silva","Marco Tarini","Denis Zorin"],"categories":null,"content":" Talk Slides ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"d91799990ab895511de5749eff8fc1f2","permalink":"http://vcg.isti.cnr.it/publication/2012/BLPPSTZ12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BLPPSTZ12/","section":"publication","summary":"abstract p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Times; min-height: 14.0px} p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Times} Triangle meshes have been nearly ubiquitous in computer graphics, and a large body of data structures and geometry processing algorithms based on them has been developed in the literature. At the same time, quadrilateral meshes, especially semi-regular ones, have advantages for many applications, and significant progress was made in quadrilateral mesh generation and processing during the last several years. In this State of the Art Report, we discuss the advantages and problems of techniques operating on quadrilateral meshes, including surface analysis and mesh quality, simplification, adaptive refinement, alignment with features, parametrization, and remeshing. Talk Slides","tags":null,"title":"Quad Meshing","type":"publication"},{"authors":["Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"11f5be2dfe5450e64ab1689b7f3b559d","permalink":"http://vcg.isti.cnr.it/publication/2012/DS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/DS12/","section":"publication","summary":" ","tags":null,"title":"Teaching 3D Acquisition for Cultural Heritage: a Theory and Practice Approach ","type":"publication"},{"authors":["Gianpaolo Palma","Eliana Siotto","Marc Proesmans","Monica Baldassarri","Clara Baracchini","Sabrina Batino","Roberto Scopigno"],"categories":null,"content":"","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"035f4a81eaa02a77f88fbe4696b7c8b1","permalink":"http://vcg.isti.cnr.it/publication/2012/PSPBBBS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/PSPBBBS12/","section":"publication","summary":"","tags":null,"title":"Telling The Story Of Ancient Coins By Means Of Interactive RTI Images Visualization","type":"publication"},{"authors":["Sabrina Batino","Marco Callieri","Daniele Duranti","Matteo Dellepiane","Paolo Pingi","Eliana Siotto","Roberto Scopigno"],"categories":null,"content":" ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"8df80bb1f3f7b5c2ea6616e214b0e8c0","permalink":"http://vcg.isti.cnr.it/publication/2012/BCDDPSS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BCDDPSS12/","section":"publication","summary":" ","tags":null,"title":"Virtual Reconstruction of an Etruscan Tomb","type":"publication"},{"authors":["Roberto Scopigno","Marco Callieri","Paolo Cignoni","Massimiliano Corsini","Matteo Dellepiane","Federico Ponchio","Guido Ranzuglia"],"categories":null,"content":"","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"3fb8940bcfac74edb84df705a0563f25","permalink":"http://vcg.isti.cnr.it/publication/2011/SCCCDPR11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/SCCCDPR11/","section":"publication","summary":"","tags":null,"title":"3D models for Cultural Heritage: beyond plain visualization","type":"publication"},{"authors":["Daniele Bernabei","Fabio Ganovelli","Marco Di Benedetto","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":"","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"0998f5f084459d5555ef3da0dc26e68f","permalink":"http://vcg.isti.cnr.it/publication/2011/BGDDS11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/BGDDS11/","section":"publication","summary":"","tags":null,"title":"A Low-Cost Time-Critical Obstacle Avoidance System for the Visually Impaired","type":"publication"},{"authors":["Ruggero Pintus","Enrico Gobbetti","Marco Callieri"],"categories":null,"content":"","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"3501d7c9a39ee83d1dd6f9ab7ae759c9","permalink":"http://vcg.isti.cnr.it/publication/2011/PGC11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/PGC11/","section":"publication","summary":"","tags":null,"title":"A Streaming Framework for Seamless Detailed Photo Blending on Massive Point Clouds","type":"publication"},{"authors":["Alessandro Artusi","Francesco Banterle","Dmitry Chetverikov"],"categories":null,"content":"","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"6faf8565b369b097bd20baa7288d734c","permalink":"http://vcg.isti.cnr.it/publication/2011/ABC11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/ABC11/","section":"publication","summary":"abstract\n\n\n\n\n\n\n\nAbstractIn the real world, materials often show both diffuse and specular reflections. To separate these two reflection components may help applications which need consistent object surface appearance. In fact, many algorithms used in numerous tasks of computer vision, computer graphics and image processing, work under the assumption of perfect Lambertian surfaces (or perfect diffuse reflection). They consider specular pixels (or highlights) as outliers or noise. Moreover, the two reflection components can be processed separately and afterwards recombined to produce particular visual effects [MZK*06] (dichromatic editing Figure.1).\n\n\n\n\n\n\nFigure 2: Example of an image where the presence of highlights generates the loss of details and colour information. Details and colours are completely washed out in the highlights region.\n\n\n\nSeveral specularity removal techniques are available in literature; they differ in the information they use and in how it is used. Table 1 summarises how these techniques may be classified and in which paragraph of this survey they are explained. The notation used in Table 1 for the categories is the following: CSA, colour space analysis; NA, neighbourhood analysis; POL, polarization; IS, image sequences; MFI, multiple-flash images. The notation used in Table 1 for the techniques is the following: CRM, using colour reflection model [KSK87, KSK88]; TDA, 2D diagram approach [ST95b, SK00]; BM, Bajcsy et al. method [BLL96]; USFI, use of specular-free images [TI05b, YCK06, SC09]; PDE, PDE approach [MZK*06]; IT, in-panting technique [TLQ06]; CC, use of colour information and classifier [TFA05]; TS, separation of highlight reflections on textured surfaces [TLQ06]; FR, Fresnel methods [Ang07]; HM, histogram methods [CGS06]; HFLF, high-low frequency separation [LPD07, NGR06]; MBS, multi-baseline-stereo [LB92, LYK*03, LS01]; MII, deriving intrinsic images from image sequences with illumination changes [Wei01]; CP, colour and polarisation methods [NFB97, KLHS02, MPC*07, USGG04]; MF, multi-flash methods [FRTT04, ARNL05].\n\n\nTable 1: The classification of highlights removal methods. These methods are classified based on the number of image used as input an the type of information used. L and G respectively stand for global and local approach. The number, in the first column, indicates the paragraph in the paper where the technique appears in the survey.\n\n\n\n\n\n\n\n\n\n\nSingle Image\nMultiple Images\n\n\n\n\n\n\n\n\n\n\n\n\nTech. - Sec.\nType\nCSA\nNA\nIS\nMFI\nPOL\n\n\n\n\n\n\nCRM - 3.1.1\nG\nx\n- - - -\n\nTDA - 3.1.2\nL\nx\n- - - -\n\nBM - 3.1.3\nG\nx\n- - - -\n\nUSFI - 3.2.1\nL\n- x\n- - -\n\nPDE - 3.2.2\nL - x\n- - -\n\nIT - 3.2.3\nL - x\n- - -\n\nTS - 3.2.4\nL - x\n- - -\n\nCC - 3.2.5\nL - x\n- - -\n\nFR - 3.2.6\nG\n- x\n- - -\n\nHM - 4\nG\n- - x\n- -\n\nHFLF - 4\nG - - x\n- -\n\nMBS - 4.1\nG - - x\n- -\n\nMII - 4.2\nL\n- - x\n- -\n\nCP - 4.3\nG\n- - - -\nx\n\n\nMF - 4.4\nL\n- - - x\n-\n\n\n\n\n\n\n\n\n\nDiscussion Several factors may influence which approach is superior to another one, such as the number of images to be captured, automatic operation vs. manual help, light constraints and the reflectance model used, merits of quality, and the hardware used during the acquisition phase. Table 2 provides a comparative summary of the specular removal methods discussed in this survey.\n\n\n\nTable 2: Comparison of the highlight removal techniques by their characteristics. The methods are grouped into the single-image category (top) and the multiple-image category (bottom). User Interaction: MS manual segmentation, A automatic, NS no segmentation, Light Requirement: IC illuminant compensation, DM dichromatic reflectance model, and FM flash model. Hardware: S single camera, M multiple camera, * polarised filters, FS flash system\n\n\n\n\n\n\n\nTechnique\nImages\nUser Interaction\nLight Requirement\nHardware\n\n\n\n\n\n\n\nColour Space [KSK87, KSK88, ST95b, SK00, BLL96]\n1\nMS\nIC-DM\nS\n\n\nSpecular-Free Image [TI05b, YCK06, SC09]\n1\nA\nIC-DM S\n\nInpainting [TLQ06]\n1\nMS\nIC-DM S\n\nPDE [MZK*06]\n1\n-\nIC-DM S\n\nTextured Surfaces [TLQ06]\n1\nMS\nIC-DM S\n\nColour Classifier [TFA05]\n1\n-\n-\nS\n\nFresnel Coefficient [Ang07]\n1\nMS\nNo IC-DM S\n\nMulti-Baseline Stereo [LB92, LYK*03, LS01]\n50-70\nNS DM\nM\n\n\nDeriving Intrinsic Images [Wei01]\n40-70\nNS Lighting changes\nS\n\n\nPolarization [NFB97, KLHS02, MPC*07, USGG04]\n6-10\nNS DM\nS*\n\n\nHistogram [CGS06]\n200\nNS -\nS\n\n\nHigh-Low Frequency Separation [LPD07, NGR06]\n4, 32\nNS\n-\nS\n\n\nMulti-flash [FRTT04, ARNL05]\n4-8,2\nNS\nFM\nFS\n\n\n\n\n\n\n\n\n\n\nFinally we have performed several experiment, to compare different specularity removal techniques, on various input images starting from single-colour, multi-colour and textured surfaces, increasing the texture complexity.\n\nReferencesFor the references please see the paper.","tags":null,"title":"A Survey of Specularity Removal Methods","type":"publication"},{"authors":["Francesco Banterle","Alessandro Artusi","Kurt Debattista","Alan Chalmers"],"categories":null,"content":"link to the official website\nlink to the HDR Toolbox git repository\n","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"de55a764eeda5a7df1d1acb349aefc0e","permalink":"http://vcg.isti.cnr.it/publication/2011/BADC11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/BADC11/","section":"publication","summary":"abstract\n\n\n\n\n\nlink to the official website\n\nlink to the HDR Toolbox git repository\n\n\nTable of Contents This book is a practical introduction to the emerging new field of High Dynamic Range Imaging that combines photography, computer vision, and computer graphics. The book provides detailed equations and Matlab code. This allows the reader to have the tools for experimenting with HDR Imaging for producing compelling images.\n\nThe book is divided in the following chapters:\nIntroduction (a brief introduction on light, human vision, and color spaces) HDR Pipeline (including capturing, storing formats, and HDR monitors) Tone Mapping Expansion Operators for Low Dynamic Range Content (Inverse/Reverse Tone Mapping) Image-Based Lighting Evaluation of Tone Mapping and Expansion Operators HDR Content Compressiong (images, textures, and videos)\n\nThe book provides three appendecies on the Bilateral Filter, Retinex Filters, and how to use the HDR Toolbox for Matlab.","tags":null,"title":"Advanced High Dynamic Range Imaging: Theory and Practice","type":"publication"},{"authors":["Nico Pietroni","Massimiliano Corsini","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" Project Page Talk Slides ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"cd660377653695c8ec2d74957413fd60","permalink":"http://vcg.isti.cnr.it/publication/2011/PCCS11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/PCCS11/","section":"publication","summary":"Analyzing either high-frequency shape detail or any other 2D fields (scalar or vector) embedded over a 3D geometry is a complex task, since detaching the detail from the overall shape can be tricky. An alternative approach is to move to the 2D space, resolving shape reasoning to easier image processing techniques. In this paper we propose a novel framework for the analysis of 2D information distributed over 3D geometry, based on a locally smooth parametrization technique that allows us to treat local 3D data in terms of image content. Project Page Talk Slides","tags":null,"title":"An interactive local flattening operator to support digital investigations on artwork surfaces","type":"publication"},{"authors":["Marco Tarini","Enrico Puppo","Daniele Panozzo","Nico Pietroni","Paolo Cignoni"],"categories":null,"content":" Talk Slides ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"eda0a934fa02f45f54adb3b10bc09b22","permalink":"http://vcg.isti.cnr.it/publication/2011/PPTPC11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/PPTPC11/","section":"publication","summary":"We present an automatic method to produce a Catmull-Clark subdivision surface that fits a given input mesh. Its control mesh is coarse and adaptive, and it is obtained by simplifying an initial mesh at high resolution. Simplification occurs progressively via local operators and addresses both quality of surface and faithfulness to the input shape throughout the whole process. The method is robust and performs well on rather complex shapes. Displacement mapping or normal mapping can be applied to approximate the input shape arbitrarily well. Talk Slides","tags":null,"title":"Automatic Construction of Quad-Based Subdivision Surfaces using Fitmaps","type":"publication"},{"authors":["Frederic Larue","Matteo Dellepiane","Henning Hamer","Roberto Scopigno"],"categories":null,"content":" ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"894248aa58b9f0f5055afc653e2f057b","permalink":"http://vcg.isti.cnr.it/publication/2011/LDHS11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/LDHS11/","section":"publication","summary":" ","tags":null,"title":"Automatic Texturing without Illumination Artifacts from In-Hand Scanning Data Flow","type":"publication"},{"authors":["Maria Girardi","Cristina Padovani","Marco Callieri","Massimiliano Corsini"],"categories":null,"content":"","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"97c8fa8e9a1ff8afbc41c936fd3f8cf6","permalink":"http://vcg.isti.cnr.it/publication/2011/GPCC11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/GPCC11/","section":"publication","summary":"","tags":null,"title":"Digital Acquisition and Structural Analysis of the \"Rognosa\" Tower in San Gimignano","type":"publication"},{"authors":["Marco Callieri","Nicolo Dell Unto","Matteo Dellepiane","Roberto Scopigno","Bengt Soderberg","Lars Larsson"],"categories":null,"content":" ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"74f5f6dac7a4aecde466edebee61d0c6","permalink":"http://vcg.isti.cnr.it/publication/2011/CDDSSL11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/CDDSSL11/","section":"publication","summary":" ","tags":null,"title":"Documentation and Interpretation of an Archeological Excavation: an Experience with Dense Stereo Reconstruction Tools ","type":"publication"},{"authors":["Roberto Scopigno","Matteo Dellepiane","Francesco Banterle"],"categories":null,"content":" ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"63a071a616a34d4587289d6d7b599398","permalink":"http://vcg.isti.cnr.it/publication/2011/BDS11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/BDS11/","section":"publication","summary":"In this paper, we present a practical system for enhancing the quality of Low Dynamic Range (LDR) videos using High Dynamic Range (HDR) background images. Our technique relies on the assumption that the HDR information is static in the video footage. This assumption can be valid in many scenarios where moving subjects are the main focus of the footage and do not have to interact with moving light sources or highly reflective objects. Another valid scenario is teleconferencing via webcams, where the background is typically over-exposed, not allowing the users to perceive correctly the environment where the communication is happening.\nThese five short videos show the technique:\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nThese videos could not be done without the help of our actors and The Director. We thank in alphabetic order: Daniele Bernabei, Marco Di Benedetto, and Stefano Marras.","tags":null,"title":"Enhancement of Low Dynamic Range Videos using High Dynamic Range Backgrounds","type":"publication"},{"authors":["Denis Zorin","Olga Sorkine","Marco Tarini","Nico Pietroni"],"categories":null,"content":" Talk Slides ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"48a270f1ba69d9e991b07f7f846ef882","permalink":"http://vcg.isti.cnr.it/publication/2011/PTSZ11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/PTSZ11/","section":"publication","summary":"We present a method to globally parameterize a surface represented by height maps over a set of planes (range images). In contrast to other parameterization techniques, we do not start with a man ifold mesh. The parameterization we compute defines a manifold structure, it is seamless and globally smooth, can be aligned to geometric features and shows good quality in terms of angle and area preservation, comparable to current parameterization techniques for meshes. Computing such global seamless parameterization makes it possible to perform quad remeshing, texture mapping and texture synthesis and many other types of geometry processing operations. Our approach is based on a formulation of the Poisson equation on a manifold structure defined for the surface by the range images. Construction of such global parameterization requires only a way to project surface data onto a set of planes, and can be applied directly to implicit surfaces, nonmanifold surfaces, very large meshes, and collections of range scans. We demonstrate application of our technique to all these geometry types. Talk Slides","tags":null,"title":"Global Parametrization of Range Image Sets","type":"publication"},{"authors":["Matteo Dellepiane","Andrea Venturi","Roberto Scopigno"],"categories":null,"content":" ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"28ed8397c36988bb9cff510d2bcbf629","permalink":"http://vcg.isti.cnr.it/publication/2011/DVS11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/DVS11/","section":"publication","summary":" ","tags":null,"title":"Image Guided Reconstruction of Un-sampled Data: A Filling Technique for Cultural Heritage Models","type":"publication"},{"authors":["Frederic Larue","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"b7cbde2ce03c5742e5b8521be51df7f4","permalink":"http://vcg.isti.cnr.it/publication/2011/LDS11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/LDS11/","section":"publication","summary":" ","tags":null,"title":"Improving High-Speed Scanning Systems by Photometric Stereo","type":"publication"},{"authors":["Rafal Mantiuk","Diego Gutierrez","Elmar Eisemann","Piotr Didyk","Tunc Aydin","Alessandro Artusi","Francesco Banterle","Karol Myszkowski"],"categories":null,"content":"Introduction\nDynamic Range Retargeting: Tone Mapping\nDynamic Range Retargeting: Cornsweet Illusion and Glare in Tone Mapping\nDynamic Range Retargeting: The Color Issue\nDynamic Range Retargeting: Reverse/Inverse Tone Mapping\nSpatial Image Retargeting\nTemporal Image Retargeting\nQuality Metrics\nStereo Retargeting\n","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"ad8c76dd9d99795121587ce211836e98","permalink":"http://vcg.isti.cnr.it/publication/2011/BAADEGMM11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/BAADEGMM11/","section":"publication","summary":"abstract\n\n\n\n\nRetargeting is a process through which an image/a video is adapted from the display device for which it was meant (target display) to another one (retarget display). The retarget display has different features from the target one such as: dynamic range, discretization levels, color gamut, multi-view (3D), refresh rate, spatial resolution... This is a very relevant and hot topic in graphics, given the increasing number of display devices, from large, high-contrast screens to small cell phones with limited dynamic range; a lot of techniques are being published in different venues, and it's simply very hard to keep up. For instance, one of the few cases for which retargeting can be potentially straightforward is when adapting images from a larger display (in term of resolution) to a smaller one with the same aspect ratio: a low-pass filter followed by downsampling can then achieve good quality results. However, for most cases retargeting can be an ill-posed problem, such as when displaying Low Dynamic Range (LDR) or 8-bit content on High Dynamic Range (HDR) displays. Such a problem requires the retargeting algorithm to generate new content which is missing in the input image/frame. In this course, we will present the latest solutions and techniques for retargeting images along various dimensions such as dynamic range, colors, temporal and spatial resolutions, and offer for the first time a much-needed holistic view of the field. Moreover, we are going to show how to measure and analyze the changes applied to an image/video in terms of quality using both (subjective) psychophysical experiments and (objective) computational metrics. The course should be of interest to anyone involved in graphics in its broader sense, given the almost unavoidable need to retarget results to different devices: from developer that are interested to implement retargeting techniques, to users that just need an overall perspective, for researchers fully engaged in developing multi-dimensional retargeting techniques, for whom this course will serve as a solid background for future algorithms.\n\n\n\nSyllabus:\nIntroduction by Francesco Banterle Dynamic Range Retargeting: Tone Mapping by Rafal Mantiuk Dynamic Range Retargeting: Cornsweet Illusion and Glare in Tone Mapping by Karol Myszkowski Dynamic Range Retargeting: The Color Issue by Alessandro Artusi Dynamic Range Retargeting: Reverse/Inverse Tone Mapping by Francesco Banterle Spatial Image Retargeting by Diego Gutierrez Temporal Image Retargeting by Elmar Eisemann and Karol Myszkowski Quality Metrics by Tunc Aydin Stereo Retargeting by Piotr Didyk","tags":null,"title":"Multidimensional Image Retargeting","type":"publication"},{"authors":["Marco Callieri","Antoni Chica","Matteo Dellepiane","Isaac Besora","Massimiliano Corsini","Jordi Moyés","Guido Ranzuglia","Roberto Scopigno","Pere Brunet"],"categories":null,"content":" ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"61108a340a595de649ffde920fbe2c88","permalink":"http://vcg.isti.cnr.it/publication/2011/CCDBCMRSB11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/CCDBCMRSB11/","section":"publication","summary":" ","tags":null,"title":"Multiscale acquisition and presentation of very large artifacts: The case of Portalada","type":"publication"},{"authors":["Franco Mosca","Andrea Pietrabissa","Fabio Ganovelli","Giuseppe Megali","Nico Pietroni","Giuseppe Turini"],"categories":null,"content":"","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"59371c4dd55001ee3183d08e6d5bf327","permalink":"http://vcg.isti.cnr.it/publication/2011/TPMGPM11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/TPMGPM11/","section":"publication","summary":"In the recent decades robotics and computer science have been gaining more and more relevance in all aspects of our lives. In surgery, for example, they gave birth to procedures, impossible to perform otherwise, like the tele-surgery or the nano-surgery. On this regard, these applied sciences already play an important role in assisting the surgeon both in the operative room and, as a support, in the education of young surgeons, but much work has still to be done. In fact in these last years we have seen an extreme change in the traditional training in surgery and the computer-based simulation is one of the main reason of this shift. The spread of Minimally Invasive Surgery (MIS) has brought major improvements in the quality of healthcare, but it has also increased the complexity of the surgical procedures requiring advanced and highly specialized training systems. Moreover these training procedures need to be reiterated during the operational life of surgeons. Therefore, considering the limited availability of cadavers and the public concern with the non-ethical treatment of animals, the traditional approaches to surgical training are drastically limited encouraging the use of surgical simulators based on virtual environments. Healthcare industries and the scientific community in medicine agree indicating the disruptive potential of the application of Virtual Reality (VR) to the training in the medical field. Therefore the next step is the development of surgical simulators with an high level of realism in order to practice complex procedures in a safe environment. Moreover it is decisive that this evolution is done integrating advanced medical imaging and processing, allowing surgeons to practice simulated interventions on patient specific dataset. The increasing importance of MIS techniques will cause a drastic change in pre-operation planning and basic surgical training. In fact, the features of this kind of surgical approach (the workspace limitation, the 2D vision through a laparoscopic camera and the indirect physical interaction with the patient body) make it possible to use a surgical simulator to train, plan or simulate an intervention, reproducing the visual and tactile feedback of the real surgical procedure on a real patient. This paper presents some research and applicative results on Computer Assisted Surgery (CAS) achieved in the framework of EndoCAS, a newly founded Center of Excellence in Pisa. The research has involved: the development of segmentation algorithms for volumetric datasets, the simulation of bone drilling procedures, the modeling of deformable object cuts and deformations and the simulation of rope interactions during a suture procedure in MIS. All these projects were been developed using a new open source library to support the implementation of techniques for simulating deformable objects. Our purpose is to enhance the surgical training with new improved techniques applied both to the medical imaging and to the computer-based simulation in order to carry the surgical training to a next level of realism.","tags":null,"title":"New techniques for computer-based simulation in surgical training","type":"publication"},{"authors":["Marco Callieri","Paolo Cignoni","Matteo Dellepiane","Guido Ranzuglia","Roberto Scopigno"],"categories":null,"content":" ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"e71739cb72cb1c6e1255539e765b8ad1","permalink":"http://vcg.isti.cnr.it/publication/2011/CCDRS11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/CCDRS11/","section":"publication","summary":" ","tags":null,"title":"Processing a Complex Architectural Sampling with MeshLab: the case of Piazza Della Signoria","type":"publication"},{"authors":["Marco Callieri","Matteo Dellepiane","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"0d6943f6624765757f28f6214b31b76d","permalink":"http://vcg.isti.cnr.it/publication/2011/CDCS11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/CDCS11/","section":"publication","summary":"","tags":null,"title":"Processing sampled 3D data: reconstruction and visualization technologies","type":"publication"},{"authors":["Marco Tarini","Enrico Puppo","Daniele Panozzo","Nico Pietroni","Paolo Cignoni"],"categories":null,"content":" Talk Slides ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"76339979ee62938ba5ee39a9e72258b1","permalink":"http://vcg.isti.cnr.it/publication/2011/TPPPC11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/TPPPC11/","section":"publication","summary":"We present a method for the global parametrization of meshes that preserves alignment to a cross field in input while obtaining a parametric domain made of few coarse axis-aligned rectangular patches,which form an abstract base complex without T-junctions. The method is based on the topological simplification of the cross field in input, followed by global smoothing Talk Slides","tags":null,"title":"Simple Quad Domains for Field Aligned Mesh Parametrization","type":"publication"},{"authors":["Marco Di Benedetto","Massimiliano Corsini","Roberto Scopigno"],"categories":null,"content":" ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"53f453c86d9306c07a998070fec14213","permalink":"http://vcg.isti.cnr.it/publication/2011/DCS11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/DCS11/","section":"publication","summary":" ","tags":null,"title":"SpiderGL: A Graphics Library for 3D Web Applications","type":"publication"},{"authors":["Matteo Dellepiane","Marco Callieri","Massimiliano Corsini","Roberto Scopigno"],"categories":null,"content":"","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"bc828eb3c65388626fa3b63f8ca21168","permalink":"http://vcg.isti.cnr.it/publication/2011/DCCS11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/DCCS11/","section":"publication","summary":"","tags":null,"title":"Using digital 3D models for study and restoration of Cultural Heritage artifacts","type":"publication"},{"authors":["Guillaume Lavoué","Massimiliano Corsini"],"categories":null,"content":" ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"70b0bf61ac43c2ea1c947e97cfcc7cc0","permalink":"http://vcg.isti.cnr.it/publication/2010/LC10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/LC10/","section":"publication","summary":" ","tags":null,"title":"A Comparison of Perceptually-Based Metrics for Objective Evaluation of Geometry Processing","type":"publication"},{"authors":["Matteo Dellepiane","Paolo Cignoni","Marco Tarini","Fabio Ganovelli","Davide Portelli","Roberto Scopigno"],"categories":null,"content":" ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"ee49dd120782722bdb9781d8c7e22fa1","permalink":"http://vcg.isti.cnr.it/publication/2010/PGTCDS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/PGTCDS10/","section":"publication","summary":" ","tags":null,"title":"A framework for User-Assisted Sketch-Based Fitting of Geometric Primitives","type":"publication"},{"authors":["Agostino Bozzo","Daniele Panozzo","Enrico Puppo","Nico Pietroni","Luigi Rocca"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"77bcfdd03b2ec86c94f0801e9753dd73","permalink":"http://vcg.isti.cnr.it/publication/2010/BPPPR10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/BPPPR10/","section":"publication","summary":"We present an improved algorithm for the progressive simplification of quad meshes, which adapts the resolution of the mesh to details of the modeled shape. We extend our previous work, by simplifying the approach and combining it with the concept of Fitmaps. The new algorithm has several advantages: it is simpler and more robust; it does not need a parametrization of the input shape; it is adaptive; and it preserves projectability of the output mesh to the input shape, thus supporting displacement mapping. We present experimental results on a variety of datasets, showing relevant improvement over previous results under several aspects.","tags":null,"title":"Adaptive quad mesh simplification","type":"publication"},{"authors":["Patrick Marais","Roberto Scopigno"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"e2a160e2583a7bd2b9b8e7a08349e344","permalink":"http://vcg.isti.cnr.it/publication/2010/MS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/MS10/","section":"publication","summary":"","tags":null,"title":"Afrigraph 2010 - Proceedings of the 7th International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa","type":"publication"},{"authors":["Nico Pietroni","Marco Tarini","Paolo Cignoni"],"categories":null,"content":" mesh processing\nTalk Slides MeshLab Here some downloadable data for comparisons Here some processed scanned model with color on texture Here some comparison with other parametrization/remeshing methods\nHere some colored by considering isometry\n","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"51afdd29905b87fac8d0f954cb736632","permalink":"http://vcg.isti.cnr.it/publication/2010/PTC10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/PTC10/","section":"publication","summary":"In this paper we propose a robust, automatic technique to build a global hi-quality parameterization of a two-manifold triangular mesh. An adaptively chosen 2D domain of the parameterization is built as par t of the process. The produced parameterization exhibits very low isometric distor tion, because it is globally optimized to preser ve both areas and angles. The domain is a collection of equilateral triangular 2D regions enriched with explicit adjacency relationships (it is abstract in the sense that no 3D embedding is necessary). It is tailored to minimize isometric distor tion, resulting in excellent parameterization qualities, even when meshes with complex shape and topology are mapped into domains composed of a small number of large continuous regions. Moreover, this domain is in turn remapped into a collection of 2D square regions, unlocking many advantages found in quad-based domains (e.g. ease of packing). The technique is tested on a variety of cases, including challenging ones, and compares ver y favorably with known approaches. Talk Slides An open source implementation is made available in our mesh processing system MeshLab . Here some downloadable data for comparisons Here some processed scanned model with color on texture Here some comparison with other parametrization/remeshing methods Here some colored by considering isometry","tags":null,"title":"Almost isometric mesh parameterization through abstract domains","type":"publication"},{"authors":["Roeland Paardekooper","B. Petersson","J. Eriksson","Stefan Lindgren","Matteo Dellepiane","Matias Wallergard","Nicolo Dell Unto"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"92ae32ed423da61927adc88cb6b54106","permalink":"http://vcg.isti.cnr.it/publication/2010/DWDLEPP10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/DWDLEPP10/","section":"publication","summary":"","tags":null,"title":"An Experiment of Integrated Technologies in Digital Archaeology: Creation of New Pipelines to Increase the Perception of Archaeological Data","type":"publication"},{"authors":["Paolo Brivio","Marco Tarini","Paolo Cignoni"],"categories":null,"content":" ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"e0edab79c4f79ebac95c736aaa9d166c","permalink":"http://vcg.isti.cnr.it/publication/2010/BTC10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/BTC10/","section":"publication","summary":"Conventional browsing of image collections use mechanisms such as thumbnails arranged on a regular grid or on a line, often mounted over a scrollable panel. However, this approach does not scale well with the size of the datasets (number of images). In this paper, we propose a new thumbnail-based interface to browse large collections of images. Our approach is based on weighted centroidal anisotropic Voronoi diagrams. A dynamically changing subset of images is represented by thumbnails and shown on the screen. Thumbnails are shaped like general polygons, to better cover screen space, while still reflecting the original aspect ratios or orientation of the represented images. During the browsing process, thumbnails are dynamically rearranged, reshaped and rescaled. The objective is to devote more screen space (more numerous and larger thumbnails) to the parts of the dataset closer to the current region of interest, and progressively lesser away from it, while still making the dataset visible as a whole. During the entire process, temporal coherence is always maintained. GPU implementation easily guarantees the frame rates needed for fully smooth interactivity.\nThree short videos showing the technique in action\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nSome Additional Material\nSlides of the presentation FastForward","tags":null,"title":"Browsing Large Image Datasets through Voronoi Diagrams","type":"publication"},{"authors":["Massimiliano Corsini","Matteo Dellepiane","Ute Dercks","Federico Ponchio","Marco Callieri","Dagmar Keultjes","A. Marinello","Roberto Sigismondi","Roberto Scopigno","Gerhard Wolf"],"categories":null,"content":" ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"04019b8bee56c97aa64f990fa81bae91","permalink":"http://vcg.isti.cnr.it/publication/2010/CDDPCKMSSW10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/CDDPCKMSSW10/","section":"publication","summary":" ","tags":null,"title":"CENOBIUM - Putting together the Romanesque Cloister Capitals of the Mediterranean Region","type":"publication"},{"authors":["Roberto Scopigno","Riccardo Scateni","Paolo Cignoni","Fabio Ganovelli","Stefano Marras"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"282c1df2c64f9b9dc3e180f848ef23ef","permalink":"http://vcg.isti.cnr.it/publication/2010/MGCSS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/MGCSS10/","section":"publication","summary":"","tags":null,"title":"Controlled and Adaptive Mesh Zippering","type":"publication"},{"authors":["Ute Dercks","Matteo Dellepiane","Massimiliano Corsini","Marco Callieri","Bernd Breuckmann","Christiane Bathow","Roberto Scopigno","Roberto Sigismondi"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"7a0eba6dbb5f210ffc5be7a137a913dd","permalink":"http://vcg.isti.cnr.it/publication/2010/BBCCDDSS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/BBCCDDSS10/","section":"publication","summary":"","tags":null,"title":"Documenting and Monitoring Small Fractures on Michelangelo’s David","type":"publication"},{"authors":["Gianpaolo Palma","Massimiliano Corsini","Paolo Cignoni","Roberto Scopigno","Mark Mudge"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"268d6c04da02385ea2c86cb8173609ed","permalink":"http://vcg.isti.cnr.it/publication/2010/PCCSM10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/PCCSM10/","section":"publication","summary":"","tags":null,"title":"Dynamic Shading Enhancement for Reflectance Transformation Imaging","type":"publication"},{"authors":["Ashish Myles","Nico Pietroni","Denis Kovacs","Denis Zorin"],"categories":null,"content":" Talk Slides ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"fbd214b7d3addbdf367cfe9c7d5d71cd","permalink":"http://vcg.isti.cnr.it/publication/2010/MPKZ10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/MPKZ10/","section":"publication","summary":"High-order and regularly sampled surface representations are more efficient and compact than general meshes and considerably simplify many geometric modeling and processing algorithms. A number of recent algorithms for conversion of arbitrary meshes to regularly sampled form (typically quadrangulation) aim to align the resulting mesh with feature lines of the geometry. While resulting in a substantial improvement in mesh quality, feature alignment makes it difficult to obtain coarse regular patch partitions of the mesh. In this paper, we propose an approach to constructing patch layouts consisting of small numbers of quadrilateral patches while maintaining good feature alignment. To achieve this, we use quadrilateral T-meshes, for which the intersection of two faces may not be the whole edge or vertex, but a part of an edge. T-meshes offer more flexibility for reduction of the number of patches and vertices in a base domain while maintaining alignment with geometric features. At the same time, T-meshes retain many desirable features of quadrangulations, allowing construction of high-order representations, easy packing of regularly sampled geometric data into textures, as well as supporting different types of discretizations for physical simulation.\nTalk Slides","tags":null,"title":"Feature-aligned T-meshes","type":"publication"},{"authors":["Gianpaolo Palma","Marco Callieri","Matteo Dellepiane","Massimiliano Corsini","Roberto Scopigno"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"cca15e4a9641aeb096303ac5998f2c66","permalink":"http://vcg.isti.cnr.it/publication/2010/PCDCS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/PCDCS10/","section":"publication","summary":"","tags":null,"title":"Geometry-Aware Video Registration","type":"publication"},{"authors":["Matteo Dellepiane","Marco Callieri","Massimiliano Corsini","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"016d51f96c116be8f10d2e5a30d5b4ae","permalink":"http://vcg.isti.cnr.it/publication/2010/DCCCS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/DCCCS10/","section":"publication","summary":" ","tags":null,"title":"Improved Color Acquisition and Mapping on 3D Models via Flash-Based Photography","type":"publication"},{"authors":["Gianpaolo Palma","Massimiliano Corsini","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"411e94c01ede27b4e2641fb8d1619d61","permalink":"http://vcg.isti.cnr.it/publication/2010/PCDS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/PCDS10/","section":"publication","summary":"","tags":null,"title":"Improving 2D-3D registration by mutual information using gradient maps","type":"publication"},{"authors":["Michele Sottile","Matteo Dellepiane","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"cf6a82c16cad2bb8de6fd477a6271d0d","permalink":"http://vcg.isti.cnr.it/publication/2010/SDCS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/SDCS10/","section":"publication","summary":" ","tags":null,"title":"Mutual Correspondences: an hybrid method for image-to-geometry registration","type":"publication"},{"authors":["Marco Tarini","Nico Pietroni","Paolo Cignoni","Daniele Panozzo","Enrico Puppo"],"categories":null,"content":" Talk Slides Here some downloadable data for comparisons Here some comparison with other quad mesh simplification methods\n","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"266903efe0802ae93a4bcd3ba1899154","permalink":"http://vcg.isti.cnr.it/publication/2010/TPCPP10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/TPCPP10/","section":"publication","summary":"In this paper we present an innovative approach to incremental quad mesh simplification, i.e. the task of producing a low complexity quad mesh starting from a high complexity one. The process is based on a novel set of strictly local operations which preserve quad structure. We show how good tessellation quality (e.g. in terms of vertex valencies) can be achieved by pursuing uniform length and canonical proportions of edges and diagonals. The decimation process is interleaved with smoothing in tangent space. The latter strongly contributes to identify a suitable sequence of local modification operations. The method is naturally extended to manage preservation of feature lines (e.g. creases) and varying (e.g. adaptive) tessellation densities. We also present an original Triangle- to-Quad conversion algorithm that behaves well in terms of geometrical complexity and tessellation quality, which we use to obtain the initial quad mesh from a given triangle mesh Talk Slides Here some downloadable data for comparisons Here some comparison with other quad mesh simplification methods","tags":null,"title":"Practical quad mesh simplification","type":"publication"},{"authors":["Paolo Cignoni","Nico Pietroni","Fabio Ganovelli","Daniele Bernabei","Sumanta Pattanaik","Roberto Scopigno"],"categories":null,"content":" ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"fb87e464c85435dca16e53506f72aa17","permalink":"http://vcg.isti.cnr.it/publication/2010/BGPCPS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/BGPCPS10/","section":"publication","summary":"In this paper we propose a novel technique to perform real-time rendering of translucent inhomogeneous materials, one of the most well known problems of Computer Graphics. The developed technique is based on an adaptive volumetric point sampling, done in a preprocessing stage, which associates to each sample the optical depth for a predefined set of directions. This information is then used by a rendering algorithm that combines the objectís surface rasterization with a ray tracing algorithm, implemented on the graphics processor, to compose the final image. This approach allows us to simulate light scattering phenomena for inhomogeneous isotropic materials in real time with an arbitrary number of light sources. We tested our algorithm by comparing the produced images with the result of ray tracing and showed that the technique is effective.","tags":null,"title":"Real-time Single Scattering Inside Inhomogeneous Materials","type":"publication"},{"authors":["Matteo Dellepiane","Luca Benedetti","Roberto Scopigno"],"categories":null,"content":" ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"d41fdce8bb9982a98857f6099957822d","permalink":"http://vcg.isti.cnr.it/publication/2010/DBS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/DBS10/","section":"publication","summary":" ","tags":null,"title":"Removing shadows for color projection using sun position estimation","type":"publication"},{"authors":["Ruggero Pintus","Enrico Gobbetti","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"cbfd8bc55d19135e80fb4865e16f1217","permalink":"http://vcg.isti.cnr.it/publication/2010/PGCS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/PGCS10/","section":"publication","summary":" ","tags":null,"title":"Shape enhancement for rapid prototyping","type":"publication"},{"authors":["Nico Pietroni","Paolo Cignoni","Miguel A. Otaduy","Roberto Scopigno"],"categories":null,"content":" IEEE Computer Graphics and Applications ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"e6485d619a492bebf0f4e9c437dfc080","permalink":"http://vcg.isti.cnr.it/publication/2010/PCOS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/PCOS10/","section":"publication","summary":"In this survey, we illustrate the different algorithms proposed in literature to synthesize and represent solid textures. Solid textures are an efficient instrument to compactly represent both the external and internal appearance of 3D objects, providing practical advantages with respect to classical 2D texturing. Recently, several methods have been proposed to synthesize solid textures. For some of those, which are commonly referred as procedural, colors are obtained by means of functions that algorithmically encode appearance and structure properties of the texture. Alternatively, example-based methods aim to capture and replicate the appearance as described by a set of input exemplars. Within this framework, we propose a novel classification of solid texture synthesis methods: boundary-independent and boundarydependent methods. In the case of boundary-independent methods, the shape of the object to be textured is irrelevant and texture information can be freely generated for each point in the space. Conversely, boundary-dependent methods conform the synthesis process to the actual shape of the object, so that they can exploit this information to orient and guide the texture generation. For better understanding the different algorithms proposed in the literature, we first provide a short introduction on 2D texture synthesis methods, focusing on the main principles which are also exploited for 3D texture synthesis. We review the different methodologies by considering their strengths and weaknesses, the class of appearances they can successfully synthesize, and failure cases. In particular, we focus our attention on advantages and drawbacks of boundary-independent methods with respect to boundary-dependent ones.\nThis PDF contains the Author version, you can downlaod the original version at IEEE Computer Graphics and Applications","tags":null,"title":"Solid-Texture Synthesis: A Survey","type":"publication"},{"authors":["Marco Di Benedetto","Federico Ponchio","Fabio Ganovelli","Roberto Scopigno"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"43a6c44f8f2245f8cc8deb26941f3200","permalink":"http://vcg.isti.cnr.it/publication/2010/DPGS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/DPGS10/","section":"publication","summary":"","tags":null,"title":"SpiderGL: A JavaScript 3D Graphics Library for Next-Generation WWW","type":"publication"},{"authors":["Marco Callieri","Massimiliano Corsini","Maria Girardi","Cristina Padovani","Andrea Pagni","Giuseppe Pasquinelli","Roberto Scopigno"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"4f98069838cfebd1b15554bce66e44b6","permalink":"http://vcg.isti.cnr.it/publication/2010/CCGPPPS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/CCGPPPS10/","section":"publication","summary":"","tags":null,"title":"The Rognosa Tower in San Gimignano: Digital Acquisition and Structural Analysis","type":"publication"},{"authors":["Luca Baronti","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"56834528555fdabaed6246dc8ef29f27","permalink":"http://vcg.isti.cnr.it/publication/2010/BDS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/BDS10/","section":"publication","summary":" ","tags":null,"title":"Using Lego pieces for camera calibration: a preliminary study","type":"publication"},{"authors":["Christiane Bathow","Bernd Breuckmann","Roberto Scopigno"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"bfe8ce9c9ed34f500242d930d79280e2","permalink":"http://vcg.isti.cnr.it/publication/2010/BBS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/BBS10/","section":"publication","summary":"","tags":null,"title":"Verification and Acceptance Tests for High Definition 3D Surface Scanners","type":"publication"},{"authors":["Marco Callieri","Raluca Mihaela Andrei","Marco Di Benedetto","Monica Zoppè","Roberto Scopigno"],"categories":null,"content":" 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The Splitting Cubes is essentially a tessellation algorithm for growing, deformable surface and it can be applied to any method for animating deformable ob jects. In this paper the case of the mesh-free methods (MMs) is considered: in this context, we decribed a practical GPU friendly method, that we named the Extended Visibility criterion, to introduce discontinuities of the deformation.","tags":null,"title":"Splitting Cubes a Fast and Robust technique for Virtual Cutting","type":"publication"},{"authors":["Denis Pitzalis","Paolo Cignoni","M. Menu","G. 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","tags":null,"title":"Portalada: A Virtual Reconstruction of the Entrance of the Ripoll Monastery","type":"publication"},{"authors":["Valentino Fiorin","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1199145600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1199145600,"objectID":"1733186252b71649625e8de3e22a6395","permalink":"http://vcg.isti.cnr.it/publication/2008/FCS08/","publishdate":"2008-01-01T00:00:00Z","relpermalink":"/publication/2008/FCS08/","section":"publication","summary":" ","tags":null,"title":"Practical and robust MLS-based integration of scanned data","type":"publication"},{"authors":["Matteo Dellepiane","Nico Pietroni","Nicolas Tsingos","Manuel Asselot","Roberto Scopigno"],"categories":null,"content":" Talk Slides ","date":1199145600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1199145600,"objectID":"82b09ed0d5041f05efc6ba9486e566e4","permalink":"http://vcg.isti.cnr.it/publication/2008/DPTAS08/","publishdate":"2008-01-01T00:00:00Z","relpermalink":"/publication/2008/DPTAS08/","section":"publication","summary":"Visual fidelity and interactivity are the main goals in Computer Graphics research, but recently also audio is assuming an important role. Binaural rendering can provide extremely pleasing and realistic three-dimensional sound, but to achieve best results it's necessary either to measure or to estimate individual Head Related Transfer Function (HRTF). This function is strictly related to the peculiar features of ears and face of the listener. Recent sound scattering simulation techniques can calculate HRTF starting from an accurate 3D model of a human head. Hence, the use of binaural rendering on large scale (i.e. video games, entertainment) could depend on the possibility to produce a sufficiently accurate 3D model of a human head, starting from the smallest possible input. In this paper we present a completely automatic system, which produces a 3D model of a head starting from simple input data (five photos and some key-points indicated by user). The geometry is generated by extracting information from images and accordingly deforming a 3D dummy to reproduce user head features. The system proves to be fast, automatic, robust and reliable: geometric validation and preliminary assessments show that it can be accurate enough for HRTF calculation.\n\nTalk Slides","tags":null,"title":"Reconstructing head models from photographs for individualized 3D-audio processing","type":"publication"},{"authors":["Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1199145600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1199145600,"objectID":"22ae70604cd8b36405c32a9c56fb7e62","permalink":"http://vcg.isti.cnr.it/publication/2008/CS08/","publishdate":"2008-01-01T00:00:00Z","relpermalink":"/publication/2008/CS08/","section":"publication","summary":"","tags":null,"title":"Sampled 3D models for CH applications: an enabling medium or a technological exercise?","type":"publication"},{"authors":["Massimiliano Corsini","Marco Callieri","Paolo Cignoni"],"categories":null,"content":" ","date":1199145600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1199145600,"objectID":"8d2b4404d1cfcb24f2a1179d31652fed","permalink":"http://vcg.isti.cnr.it/publication/2008/CCC08/","publishdate":"2008-01-01T00:00:00Z","relpermalink":"/publication/2008/CCC08/","section":"publication","summary":" ","tags":null,"title":"Stereo Light Probe","type":"publication"},{"authors":["Olivier Balet","J. 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Compdaer","Enrico Gobbetti","Roberto Scopigno"],"categories":null,"content":"","date":1199145600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1199145600,"objectID":"28e449420e22a13a9c361bdfbd7f2506","permalink":"http://vcg.isti.cnr.it/publication/2008/BDCGS08/","publishdate":"2008-01-01T00:00:00Z","relpermalink":"/publication/2008/BDCGS08/","section":"publication","summary":"","tags":null,"title":"The CRIMSON Project - Simulating Populations in Massive Urban Environments","type":"publication"},{"authors":["Roberto Scopigno"],"categories":null,"content":"","date":1199145600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1199145600,"objectID":"4138b48accf56d209c45896d73bdafb4","permalink":"http://vcg.isti.cnr.it/publication/2008/Sco08a/","publishdate":"2008-01-01T00:00:00Z","relpermalink":"/publication/2008/Sco08a/","section":"publication","summary":"","tags":null,"title":"Three-dimensional digitization: making it easier and extending it to color","type":"publication"},{"authors":["Marco Callieri","Federico Ponchio","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1199145600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1199145600,"objectID":"d118f82cec67f3456c3c11dfc98cc624","permalink":"http://vcg.isti.cnr.it/publication/2008/CPCS08/","publishdate":"2008-01-01T00:00:00Z","relpermalink":"/publication/2008/CPCS08/","section":"publication","summary":" ","tags":null,"title":"Virtual Inspector: a flexible visualizer for dense 3D scanned models","type":"publication"},{"authors":["Hanspeter Pfister","Moritz Bacher","Miriah Meyer","Gael Guennebaud","Christian Ledergerber"],"categories":null,"content":" ","date":1199145600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1199145600,"objectID":"2c1adb13d1a261b25873b09d600d8aa5","permalink":"http://vcg.isti.cnr.it/publication/2008/LGMBP08/","publishdate":"2008-01-01T00:00:00Z","relpermalink":"/publication/2008/LGMBP08/","section":"publication","summary":" ","tags":null,"title":"Volume MLS Ray Casting","type":"publication"},{"authors":["Blazej Kubiak","Nico Pietroni","Fabio Ganovelli","Marco Fratarcangeli"],"categories":null,"content":" ","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"2cf384b59be440d28df20fcb60640e84","permalink":"http://vcg.isti.cnr.it/publication/2007/KPGF07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/KPGF07/","section":"publication","summary":"In this paper, we present a physically based model for real-time simulation of thread dynamics. Our model captures all the relevant aspects of the physics of the thread, including quasi-zero elasticity, bending, torsion and self-collision, and it provides output forces for the haptic feedback. The physical properties are modeled in terms of constraints that are iteratively satisÞed while the numerical integration is carried out through a Verlet scheme. This approach leads to an unconditionally stable, controllable and computationally light simulation. Our results demonstrate the effectiveness of our model, showing the interaction of the thread with other objects in real time and the creation of complex knots.","tags":null,"title":"A Robust Method for Real-Time Thread Simulation","type":"publication"},{"authors":["Clara Baracchini","Marco Callieri","Massimiliano Corsini","Matteo Dellepiane","Ute Dercks","Dagmar Keultjes","Claudio Montani","Matteo Scognamiglio","Roberto Scopigno","Roberto Sigismondi","Gerhard Wolf"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"f2b72442d0fe1bd55abbd33690db079d","permalink":"http://vcg.isti.cnr.it/publication/2007/BCCDDKMSSSW07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/BCCDDKMSSSW07/","section":"publication","summary":"","tags":null,"title":"CENOBIUM Cultural Electronic Network Online: Binding Up Interoperably Usable Multimedia","type":"publication"},{"authors":["Nicolas Tsingos","Carsten Dachsbacher","Silvain Lefebvre","Matteo Dellepiane"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"892010186a725d83fc095868e7d51edb","permalink":"http://vcg.isti.cnr.it/publication/2007/TDLD07a/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/TDLD07a/","section":"publication","summary":"","tags":null,"title":"Extending geometrical acoustics to highy detailed architectural environments","type":"publication"},{"authors":["Roberto Scopigno","Paolo Cignoni","Claudio Montani"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"1df37a667c668245272d840b01453f1d","permalink":"http://vcg.isti.cnr.it/publication/2007/SCM07a/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/SCM07a/","section":"publication","summary":"","tags":null,"title":"High quality digital acquisition and virtual presentation of three-dimensional models","type":"publication"},{"authors":["Roberto Scopigno","Marco Callieri","Claudio Montani"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"3d17e58d1fa3591c6591e85904bb67ad","permalink":"http://vcg.isti.cnr.it/publication/2007/SCM07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/SCM07/","section":"publication","summary":"","tags":null,"title":"Il rilievo digitale tridimensionale, un nuovo strumento di analisi e documentazione per il restauro","type":"publication"},{"authors":["Nicolas Tsingos","Carsten Dachsbacher","Silvain Lefebvre","Matteo Dellepiane"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"d77fc4e4a5ff350b99757388075478f7","permalink":"http://vcg.isti.cnr.it/publication/2007/TDLD07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/TDLD07/","section":"publication","summary":"","tags":null,"title":"Instant sound scattering","type":"publication"},{"authors":["Khoa-Van Nguyen","Matteo Dellepiane","Isabelle Viaud-Delmon","Olivier Warusfel"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"e3dc653c1222dd0b41bb83a0281d41ee","permalink":"http://vcg.isti.cnr.it/publication/2007/NDVW07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/NDVW07/","section":"publication","summary":"","tags":null,"title":"Investigation of auditory-visual integration in VR Environments","type":"publication"},{"authors":["Matteo Dellepiane","Marco Callieri","Federico Ponchio","Roberto Scopigno"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"afb48fedb886681d166e18ad5a979909","permalink":"http://vcg.isti.cnr.it/publication/2007/DCPS07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/DCPS07/","section":"publication","summary":"","tags":null,"title":"Mapping highly detailed color information on extremely dense 3D models: the case of David’s restoration","type":"publication"},{"authors":["Giuseppe Turini","Nico Pietroni","Giuseppe Megali","Andrea Pietrabissa"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"7d9bb242db532fefa3d63bc87882fa04","permalink":"http://vcg.isti.cnr.it/publication/2007/TPMP07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/TPMP07/","section":"publication","summary":"In the recent decades robotics and computer science have been gaining more and more relevance in all aspects of our lives. In surgery, for example, they gave birth to procedures, impossible to perform otherwise, like the tele-surgery or the nano-surgery. On this regard, these applied sciences already play an important role in assisting the surgeon both in the operative room and, as a support, in the education of young surgeons, but much work has still to be done. In fact in these last years we have seen an extreme change in the traditional training in surgery and the computer-based simulation is one of the main reason of this shift. The spread of Minimally Invasive Surgery (MIS) has brought major improvements in the quality of healthcare, but it has also increased the complexity of the surgical procedures requiring advanced and highly specialized training systems. Moreover these training procedures need to be reiterated during the operational life of surgeons. Therefore, considering the limited availability of cadavers and the public concern with the non-ethical treatment of animals, the traditional approaches to surgical training are drastically limited encouraging the use of surgical simulators based on virtual environments. Healthcare industries and the scientific community in medicine agree indicating the disruptive potential of the application of Virtual Reality (VR) to the training in the medical field. Therefore the next step is the development of surgical simulators with an high level of realism in order to practice complex procedures in a safe environment. Moreover it is decisive that this evolution is done integrating advanced medical imaging and processing, allowing surgeons to practice simulated interventions on patient specific dataset. The increasing importance of MIS techniques will cause a drastic change in pre-operation planning and basic surgical training. In fact, the features of this kind of surgical approach (the workspace limitation, the 2D vision through a laparoscopic camera and the indirect physical interaction with the patient body) make it possible to use a surgical simulator to train, plan or simulate an intervention, reproducing the visual and tactile feedback of the real surgical procedure on a real patient. This paper presents some research and applicative results on Computer Assisted Surgery (CAS) achieved in the framework of EndoCAS, a newly founded Center of Excellence in Pisa. The research has involved: the development of segmentation algorithms for volumetric datasets, the simulation of bone drilling procedures, the modeling of deformable object cuts and deformations and the simulation of rope interactions during a suture procedure in MIS. All these projects were been developed using a new open source library to support the implementation of techniques for simulating deformable objects. Our purpose is to enhance the surgical training with new improved techniques applied both to the medical imaging and to the computer-based simulation in order to carry the surgical training to a next level of realism.","tags":null,"title":"New techniques for computer-based simulation in surgical training","type":"publication"},{"authors":["Valentino Fiorin","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"ca01f0d8dab53cb78e1b4f4826ce0b11","permalink":"http://vcg.isti.cnr.it/publication/2007/FCS07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/FCS07/","section":"publication","summary":"","tags":null,"title":"Out-of-core MLS reconstruction","type":"publication"},{"authors":["Roberto Scopigno"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"f9430a922069dd0aff9aeaf13d2f42fc","permalink":"http://vcg.isti.cnr.it/publication/2007/Sco07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/Sco07/","section":"publication","summary":"","tags":null,"title":"Processing methodologies and interactive visualization of 3D scanned architectures","type":"publication"},{"authors":["Paolo Cignoni","Marco Di Benedetto","Fabio Ganovelli","Enrico Gobbetti","Fabio Marton","Roberto Scopigno"],"categories":null,"content":" ","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"c373384c28b002034685afd4317f3096","permalink":"http://vcg.isti.cnr.it/publication/2007/CDGGMS07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/CDGGMS07/","section":"publication","summary":" ","tags":null,"title":"Ray-Casted BlockMaps for Large Urban Models Streaming and Visualization","type":"publication"},{"authors":["Giuseppe Turini","Nico Pietroni","Fabio Ganovelli","Roberto Scopigno"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"49654bd1fa7387041f2e828599f76582","permalink":"http://vcg.isti.cnr.it/publication/2007/TPGS07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/TPGS07/","section":"publication","summary":"In the recent decades robotic and computer science have been gaining more and more relevance in all aspects of our lives. In surgery, for example, they gave birth to procedures that would be impossible to perform otherwise (e.g. tele-surgery, nano-surgery). On this regard, these applied sciences already play an important role in assisting the surgeon both in the operative room and as a support in the education of young surgeons, but much work has still to be done. This paper presents some research and applicative results on Computer Assisted Surgery achieved in the framework of Endocas, a newly founded Center of Excellence in Pisa: A method for segmentation of anatomic parts from 3D dataset able to recover shapes from noisy 3D dataset; A technique for simulating bone drilling using a adaptive decomposition of tetrahedral meshes; A new open source library to support the implementation of techniques for simulating deformable objects.","tags":null,"title":"Techniques for Computer Assisted Surgery","type":"publication"},{"authors":["Nico Pietroni","Miguel A. Otaduy","Bernd Bickel","Fabio Ganovelli","Markus Gross"],"categories":null,"content":" Talk Slides ","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"5bd5a53b88797f48b747b3c217a0d9e3","permalink":"http://vcg.isti.cnr.it/publication/2007/POBGG07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/POBGG07/","section":"publication","summary":"We introduce a new appearance-modeling paradigm for synthesizing the internal structure of a 3D model from photographs of a few cross-sections of a real object. When the internal surfaces of the 3D model are revealed as it is cut, carved, or simply clipped, we synthesize their texture from the input photographs. Our texture synthesis algorithm is best classified as a morphing technique, which efficiently outputs the texture attributes of each surface point on demand. For determining source points and their weights in the morphing algorithm, we propose an interpolation domain based on BSP trees that naturally resembles planar splitting of real objects. In the context of the interpolation domain, we define efficient warping and morphing operations that allow for real-time synthesis of textures. Overall, our modeling paradigm, together with its realization through our texture synthesis algorithm, allow users to author 3D models that reveal highly realistic internal surfaces in a variety of artistic flavors.\nTalk Slides","tags":null,"title":"Texturing Internal Surfaces from a Few Cross Sections","type":"publication"},{"authors":["Matteo Dellepiane","Marco Callieri","Mark Fondersmith","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"d9eb78f83030eb2120ec1de50ece3c8b","permalink":"http://vcg.isti.cnr.it/publication/2007/DCFCS07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/DCFCS07/","section":"publication","summary":" ","tags":null,"title":"Using 3D scanning to analyze a proposal for the attribution of a bronze horse to Leonardo da Vinci","type":"publication"},{"authors":["Michele Brunetti","Marco Callieri","Benedetto Pizzo","Claudio Montani","Paolo Pingi","Roberto Scopigno"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"d4266ccc0f3c59ad836a4e17c389a310","permalink":"http://vcg.isti.cnr.it/publication/2007/BCPMPS07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/BCPMPS07/","section":"publication","summary":"","tags":null,"title":"Using 3D scanning to monitor wood deformations and to evaluate preservation strategies","type":"publication"},{"authors":["Massimiliano Corsini","Elisa Drelie Gelasca","Touradj Ebrahimi","Mauro Barni"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"9221b9839e1b6aa1575d31a8cc93ca61","permalink":"http://vcg.isti.cnr.it/publication/2007/CDEB07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/CDEB07/","section":"publication","summary":"","tags":null,"title":"Watermarked 3D Mesh Quality Assessment","type":"publication"},{"authors":["Marco Callieri","Paul Debevec","Jarrel Pair","Roberto Scopigno"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"c366fe9baa02e40f19542f5835341820","permalink":"http://vcg.isti.cnr.it/publication/2006/CDPS06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/CDPS06/","section":"publication","summary":"","tags":null,"title":"A realtime immersive application with realistic lighting: the Parthenon","type":"publication"},{"authors":["Marco Tarini","Paolo Cignoni","Claudio Montani"],"categories":null,"content":" QuteMol\nqutemol.sourceforge.net\n","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"2cfabf3154c670ac7ccc6ecc39221779","permalink":"http://vcg.isti.cnr.it/publication/2006/TCM06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/TCM06/","section":"publication","summary":"The paper presents a set of combined techniques to enhance the real-time visualization of simple or complex molecules (up to order of $10^6$ atoms) space fill mode. The proposed approach includes an innovative technique for efficient computation and storage of ambient occlusion terms, a small set of GPU accelerated procedural impostors for space-fill and ball-and-stick rendering, and novel edge-cueing techniques. As a result, the user's understanding of the three-dimensional structure under inspection is strongly increased (even for still images), while the rendering still occurs in real time.\nThe techniques shown in the above paper are implemented in the open source tool QuteMol freely available at qutemol.sourceforge.net","tags":null,"title":"Ambient occlusion and edge cueing to enhance real time molecular visualization","type":"publication"},{"authors":["Paolo Cignoni","Marco Callieri","Roberto Scopigno","Giorgio Gori","Marida Risaliti"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"ebe0dc2e6c2a1c9effc2feeeb3a3bbb7","permalink":"http://vcg.isti.cnr.it/publication/2006/CCSGR06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/CCSGR06/","section":"publication","summary":"","tags":null,"title":"Beyond manual drafting: a restoration-oriented system","type":"publication"},{"authors":["Enrico Gobbetti","Fabio Marton","Paolo Cignoni","Marco Di Benedetto","Fabio Ganovelli"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"58466666780e31b4c9bae5afe631ae9b","permalink":"http://vcg.isti.cnr.it/publication/2006/GMCDG06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/GMCDG06/","section":"publication","summary":"We describe a compressed multiresolution representation for supporting interactive rendering of very large planar and spherical terrain surfaces. The technique, called Compressed Batched Dynamic Adaptive Meshes (C-BDAM), is an extension of the BDAM and P-BDAM chunked level-of-detail hierarchy. In the C-BDAM approach, all patches share the same regular triangulation connectivity and incrementally encode their vertex attributes using a quantized representation of the difference with respect to values predicted from the coarser level. The structure provides a number of benefits: simplicity of data structures, overall geometric continuity for planar and spherical domains, support for variable resolution input data, management of multiple vertex attributes, efficient compression and fast construction times, ability to support maximum-error metrics, real-time decompression and shaded rendering with configurable variable level-of-detail extraction, and runtime detail synthesis. The efficiency of the approach and the achieved compression rates are demonstrated on a number of test cases, including the interactive visualization of a 29 gigasample reconstruction of the whole planet Earth created from high resolution SRTM data.","tags":null,"title":"C-BDAM - Compressed Batched Dynamic Adaptive Meshes for Terrain Rendering","type":"publication"},{"authors":["Marco Callieri","Federico Ponchio","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"679298db72b1da05129e6dd1a6c5849f","permalink":"http://vcg.isti.cnr.it/publication/2006/CPCS06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/CPCS06/","section":"publication","summary":"","tags":null,"title":"Easy Access to Huge 3D Models of Works of Art","type":"publication"},{"authors":["Roberto Scopigno","Marco Callieri","Massimiliano Corsini","Matteo Dellepiane"],"categories":null,"content":" ","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"4a56720bc75f6e7ab41fb51799cb7e8d","permalink":"http://vcg.isti.cnr.it/publication/2006/DCCS06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/DCCS06/","section":"publication","summary":"Reflection Transformation Imaging has proved to be a powerful method to acquire and represent the 3D reflectance properties of an object, displaying them as a 2D image. Recently, Polynomial Texture Maps (PTM), which are relightable images created from a set of photos of the object taken under several different lighting conditions, have been used in Cultural Heritage field to document and virtually inspect several sets of small objects, such as cuneiform tablets and coins. In this paper we explore the possibility of producing high quality PTM of medium or large size objects. The aim is to analyze the acquisition pipeline, resolving all the issues related to the size of the object, and the conditions of acquisition. We will discuss issues regarding acquisition planning and data gathering. We also present a new tool to interactively browse high resolution PTMs. Moreover, we perform some quality assessment considerations, in order to study the degradation of quality of the PTMs respect to the number and position of lights used to acquire the PTM. The results of our acquisition system are presented with some examples of PTMs of large artifacts like a sarcophagus of 2.4 $\\times$ 1 m size. PTM can be a good alternative to 3D scanning for capturing and representing certain class of objects, like bas-relieves, having lower costs in terms of acquisition equipment and data processing time.","tags":null,"title":"High Quality PTM Acquisition: Reflection Transformation Imaging for Large Objects","type":"publication"},{"authors":["Marcello Balzani","Claudio Montani","Roberto Scopigno"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"cf4a92308cb50d7e115859af24f26945","permalink":"http://vcg.isti.cnr.it/publication/2006/BMSP06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/BMSP06/","section":"publication","summary":"","tags":null,"title":"Il rilievo laser scanner terrestre come integrazione dei sistemi informativi di documentazione storica e di restauro","type":"publication"},{"authors":["Guido Ranzuglia","Paolo Cignoni","Fabio Ganovelli","Roberto Scopigno"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"54ff1b37830b18c4c9a4e3e66f7408dd","permalink":"http://vcg.isti.cnr.it/publication/2006/RCGS06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/RCGS06/","section":"publication","summary":"","tags":null,"title":"Implementing Mesh-Based Approaches for deformable Objects on GPU","type":"publication"},{"authors":["Marcello Balzani","Federico Uccelli","Roberto Scopigno","Claudio Montani"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"68f5d3aa0b788a3ae6128a9472a79459","permalink":"http://vcg.isti.cnr.it/publication/2006/BUSM06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/BUSM06/","section":"publication","summary":"","tags":null,"title":"La Cattedrale di Pisa nella Piazza dei Miracoli: un rilievo 3D per l’integrazione con i sistemi informativi di documentazione storica e di restauro","type":"publication"},{"authors":["Marcello Balzani","Federico Uccelli","Roberto Scopigno","Claudio Montani"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"480dd9d32d27f04bf9f9e48763e1d6fb","permalink":"http://vcg.isti.cnr.it/publication/2006/BUSM06a/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/BUSM06a/","section":"publication","summary":"","tags":null,"title":"La Cattedrale di Pisa: Un rilievo 3D per l'integrazione con i sistemi informativi di documentazione storica e di restauro","type":"publication"},{"authors":["Andrea Spinelli","Fabio Ganovelli","Claudio Montani","Roberto Scopigno"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"8a3bbafb31f765e89a029ab1f6af8c3a","permalink":"http://vcg.isti.cnr.it/publication/2006/SGMS06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/SGMS06/","section":"publication","summary":"","tags":null,"title":"Recovering 3D Architectural Information from Dense Digital Models of Buildings","type":"publication"},{"authors":["Massimiliano Corsini","Matteo Dellepiane","Marco Callieri","Roberto Scopigno"],"categories":null,"content":" ","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"7e5270ab12497f93e7375128145ff6ce","permalink":"http://vcg.isti.cnr.it/publication/2006/CDCS06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/CDCS06/","section":"publication","summary":" ","tags":null,"title":"Reflection Transformation Imaging on Larger Objects: an Alternative Method for Virtual Representation","type":"publication"},{"authors":["Giuseppe Turini","Fabio Ganovelli","Claudio Montani"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"72610e821affbdae39755a4f385b1ba0","permalink":"http://vcg.isti.cnr.it/publication/2006/TGM06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/TGM06/","section":"publication","summary":"Bone drilling is a fundamental task in several surgical procedures, including mastoidectomy, cochlear implantation, orbital surgery. It consists in eroding the part of the bone in contact with the tip of the surgical tool when a sufficient pressure is exerted. Since the bone is an almost rigid material, the bone drilling simulations usually employ voxel-based representations of the bone, so that it is easy to show material removal by playing with material density in the voxels. Unfortunately, there are cases in which drilling is only a part of the task, and parts of the same object are also cut away or, worse, the bone is slightly deformable and therefore voxel-based representations do not work well. We propose a novel method to simulate drilling on objects represented explicitly by means of a tetrahedral mesh. The key idea of our method is to create an alternative representation of the tetrahedron when it is partially eroded. Such representation consists of a set of smaller tetrahedra obtained by a hierarchical decomposition of the original one, and combined to represent the current status of the erosion.","tags":null,"title":"Simulating Drilling on Tetrahedral Meshes","type":"publication"},{"authors":["Gerhard Wolf","Roberto Sigismondi","Roberto Scopigno","Matteo Scognamiglio","Claudio Montani","Dagmar Keultjes","Ute Dercks","Matteo Dellepiane","Massimiliano Corsini","Marco Callieri","Clara Baracchini"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"937d9359a9c5e2c46dc3fd43ad18e04b","permalink":"http://vcg.isti.cnr.it/publication/2006/BCCDDKMSSSW06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/BCCDDKMSSSW06/","section":"publication","summary":"","tags":null,"title":"Starting the CENOBIUM Project: The cloister of Monreale (Sicily) Revealed","type":"publication"},{"authors":["Matteo Dellepiane","Marco Callieri"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"b3e86372c4c685aab414aac8bfdaf66d","permalink":"http://vcg.isti.cnr.it/publication/2006/DC06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/DC06/","section":"publication","summary":"","tags":null,"title":"Visualization of Colour Information on Highly Detailed 3D Models","type":"publication"},{"authors":["Marco Tarini","Hendrik Lensch","Gösele Michael","Hans-Peter Seidel"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"7b0a8c51e9ffa04330f9629a199c6fb1","permalink":"http://vcg.isti.cnr.it/publication/2005/TLMS05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/TLMS05/","section":"publication","summary":"","tags":null,"title":"3D Acquisition of Mirroring Objects using Striped Patterns","type":"publication"},{"authors":["Frank ter Haar","Paolo Cignoni","Patrick Min","Remco Veltkamp"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"aeefc9bedb3038850e47be259e860632","permalink":"http://vcg.isti.cnr.it/publication/2005/TCMV05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/TCMV05/","section":"publication","summary":"","tags":null,"title":"A Comparison of Systems and Tools for 3D Scanning","type":"publication"},{"authors":["Paolo Cignoni","Roberto Scopigno","Marco Tarini"],"categories":null,"content":" ","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"8e3b63e38881fd3bf145991da0e6522d","permalink":"http://vcg.isti.cnr.it/publication/2005/CST05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/CST05/","section":"publication","summary":" ","tags":null,"title":"A simple Normal Enhancement technique for Interactive Non-photorealistic Renderings","type":"publication"},{"authors":["Gaetano Impoco","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"0d0d7e69c2bdb914bc9d39d625c9e180","permalink":"http://vcg.isti.cnr.it/publication/2005/ICS05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/ICS05/","section":"publication","summary":"","tags":null,"title":"A six-degrees-of-freedom planning algorithm for the acquisition of complex surfaces","type":"publication"},{"authors":["Claudio Montani","Roberto Scopigno","Matteo Dellepiane","Fabio Ganovelli","Paolo Cignoni","Thomas Franken"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"c8d3748d09350de35aa78c8e28d0bcdb","permalink":"http://vcg.isti.cnr.it/publication/2005/FCGDSM05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/FCGDSM05/","section":"publication","summary":"","tags":null,"title":"Assisting the user in image to geometry alignment","type":"publication"},{"authors":["Fabio Marton","Enrico Gobbetti","Fabio Ganovelli","Paolo Cignoni","Federico Ponchio","Roberto Scopigno"],"categories":null,"content":" ","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"452e30ddeef62287c20923ebf0823d49","permalink":"http://vcg.isti.cnr.it/publication/2005/CGGMPS05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/CGGMPS05/","section":"publication","summary":" ","tags":null,"title":"Batched Multi Triangulation","type":"publication"},{"authors":["Marco Callieri","Paolo Cignoni","Andrea Fasano","Claudio Montani","Paolo Pingi","Federico Ponchio","Roberto Scopigno"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"a3053c7263ae45e37d548bc2d9b55dc7","permalink":"http://vcg.isti.cnr.it/publication/2005/CCFMPPS05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/CCFMPPS05/","section":"publication","summary":"","tags":null,"title":"Enhancing processing and visualization efficiency of 3D scanned meshes","type":"publication"},{"authors":["Paolo Pingi","Andrea Fasano","Paolo Cignoni","Claudio Montani","Roberto Scopigno"],"categories":null,"content":" ","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"d209d795a61203dbb174ad4cc0f77113","permalink":"http://vcg.isti.cnr.it/publication/2005/PFCMS05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/PFCMS05/","section":"publication","summary":"Range map registration is still the most time consuming phase in the processing of 3D scanning data. This is because real scanning sets are composed of hundreds of range maps and their registration is still partially manual. We propose a new method to manage complex scan sets acquired by following a regular scanner pose pattern. Our goal is to define an initial adjacency graph by coarsely aligning couples of range maps that we know are partially overlapping thanks to the adopted scanning strategy. For a pair of partially overlapping range maps, our iterative solution locates pairs of correspondent vertices through the computation of a regular n×n kernel which takes into account vertex normals and is defined in the 2D space of the range map (represented in implicit 2D format rather than as a triangle mesh in 3D space). The shape-characterization kernel and the metrics defined give a sufficiently accurate shape matching, which has been proven to fit well the requirements of automatic registration. This initial set of adjacency arcs can then be augmented by the automatic identification of the other significant arcs, by adopting a criterion based on approximate range map overlap computation. With respect to the solutions present in literature, the simplifications and assumptions adopted make our solution specifically oriented to complex 3D scanning campaigns (hundreds of range maps). The proposed method can coarsely register range maps in parallel with the acquisition activity and this is a valuable help in assessing on site the completeness of the sampling of large objects.","tags":null,"title":"Exploiting the scanning sequence for automatic registration of large sets of range maps","type":"publication"},{"authors":["Rita Borgo","Matteo Dellepiane","Paolo Cignoni","Laura Papaleo","Michela Spagnuolo"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"8ef1f904978c16771686fe9906f39aa7","permalink":"http://vcg.isti.cnr.it/publication/2005/BDCPS05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/BDCPS05/","section":"publication","summary":"","tags":null,"title":"Extracting Meta-Information From 3-Dimensional Shapes With Protégé","type":"publication"},{"authors":["Riccardo Scateni","Paolo Cignoni","Claudio Montani","Roberto Scopigno"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"50944d678a08aade9a7d6a231081b4d3","permalink":"http://vcg.isti.cnr.it/publication/2005/SCMS05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/SCMS05/","section":"publication","summary":"","tags":null,"title":"Fondamenti di Grafica Tridimensionale Interattiva","type":"publication"},{"authors":["Paolo Cignoni","Claudio Rocchini"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"9d25323900c57b78ce11ffd70b088b1b","permalink":"http://vcg.isti.cnr.it/publication/2005/CR05a/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/CR05a/","section":"publication","summary":"","tags":null,"title":"Generating random points in a tetrahedron","type":"publication"},{"authors":["Roberto Scopigno"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"49331637c04320bb1592816d636ba1cc","permalink":"http://vcg.isti.cnr.it/publication/2005/Sco05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/Sco05/","section":"publication","summary":"","tags":null,"title":"Gestione Efficiente dei Dati Prodotti dai Sistemi di Scansione Tridimensionale","type":"publication"},{"authors":["Clara Baracchini","Andrea Brogi","Marco Callieri","Lucia Capitani","Paolo Cignoni","Andrea Fasano","Claudio Montani","C. Nenci","R. P. Novello","Paolo Pingi","Federico Ponchio","Roberto Scopigno"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"148c07ec17efa5173de2f0ba7dedf379","permalink":"http://vcg.isti.cnr.it/publication/2005/BBCCCFMNNPPS05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/BBCCCFMNNPPS05/","section":"publication","summary":"","tags":null,"title":"Interactive visualization of artwork’s 3D digital reconstruction","type":"publication"},{"authors":["Roberto Scopigno","Claudio Montani","Paolo Cignoni","Fabio Ganovelli","Matteo Dellepiane","Thomas Franken"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"e2a9543984635795b50f380b528f691a","permalink":"http://vcg.isti.cnr.it/publication/2005/FDGCMS05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/FDGCMS05/","section":"publication","summary":"","tags":null,"title":"Minimizing user intervention in registering 2D images to 3D models","type":"publication"},{"authors":["Marco Tarini","Paolo Cignoni"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"3a228b3d63468a95465978a8aee4ae5e","permalink":"http://vcg.isti.cnr.it/publication/2005/TC05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/TC05/","section":"publication","summary":"We introduce a new texture representation that combines standard bi-linearly interpolated samples, for smoothly varying regions, with customizable discontinuities for sharp boundaries between these regions. It consists in a standard signal texture, plus a second texture we call pinchmap, which encodes discontinuities along generally curved lines; this structure is stored in texture memory as a pair of images and is effciently interpreted on commodity graphic hardware in the fragment shader. We also present a fully automatic way to compute a pinchmap and signal texture pair from an much higher resolution image. We show that the final effect on the screen is a comparable visual quality, for a fraction of the texture storage cost and a very small impact on performance.","tags":null,"title":"Pinchmaps: Textures with Customizable Discontinuities","type":"publication"},{"authors":["Roberto Scopigno","Paolo Cignoni"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"85f7702b0cbbb301c3f37c2eb7038191","permalink":"http://vcg.isti.cnr.it/publication/2005/SC05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/SC05/","section":"publication","summary":"","tags":null,"title":"Processing huge scanned datasets: issues and solutions","type":"publication"},{"authors":["Marco Callieri","Paul Debevec","Jarrel Pair","Roberto Scopigno"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"77de5cef868b11e511ae2c805a43f124","permalink":"http://vcg.isti.cnr.it/publication/2005/CDPS05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/CDPS05/","section":"publication","summary":"","tags":null,"title":"Realistic realtime illumination of complex environment for immersive systems a case study: the Parthenon","type":"publication"},{"authors":["Nico Pietroni","Andrea Giachetti","Fabio Ganovelli"],"categories":null,"content":" ","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"2220adfb70652921950cab33518cfa1a","permalink":"http://vcg.isti.cnr.it/publication/2005/PGG05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/PGG05/","section":"publication","summary":"Computer assisted medical applications require often the reconstruction of anatomical structures to compute parameters useful for diagnosis or interventional planning. From CT and MRI datasets it is possible to obtain surface models of the organs of interest with a variety of algorithms, like Marching Cubes, level sets or deformable parametric surfaces. Each technique has advantages but also drawbacks like noise sensitivity (isosurface extraction), risk of leakages (level sets), oversmoothing and impossible handling of topological changes (Deformable models). To obtain a good trade-off between robustness, shape constraints and topological control, we propose a 3D balloon/isosurface method joining the advantages in curvature control, leakage penalization and efficiency of parametric surfaces with a fast re-parametrization handling topological changes. It is based on the control of surface self-intersections, freezing of the intersected nodes and replacement of the final mesh with an isosurface computed on a field representing the signed distance from the true surface.","tags":null,"title":"Robust segmentation of anatomical structures with deformable surfaces and marching cubes","type":"publication"},{"authors":["Michael S. 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Gambino","Raffaella Fontana","Marinella Greco","E Pampaloni","Luca Pezzati","Paolo Pingi","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1041379200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1041379200,"objectID":"54dcceb6016cea6ece7841252e4d1856","permalink":"http://vcg.isti.cnr.it/publication/2003/GFGPPPCS03/","publishdate":"2003-01-01T00:00:00Z","relpermalink":"/publication/2003/GFGPPPCS03/","section":"publication","summary":"","tags":null,"title":"Supporting the restoration of the Minerva of Arezzo","type":"publication"},{"authors":["Roberto Scopigno","Paolo Cignoni","Marco Callieri","Fabio Ganovelli","Gaetano Impoco","Paolo Pingi","Federico Ponchio"],"categories":null,"content":"","date":1041379200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1041379200,"objectID":"9e1e1afcdc2ad88fc538cf39446f0ccc","permalink":"http://vcg.isti.cnr.it/publication/2003/SCCGIPP03/","publishdate":"2003-01-01T00:00:00Z","relpermalink":"/publication/2003/SCCGIPP03/","section":"publication","summary":"","tags":null,"title":"Using optically scanned 3D data in the restoration of Michelangelo David","type":"publication"},{"authors":["Marco Callieri","Paolo Cignoni","Fabio Ganovelli","Claudio Montani","Paolo Pingi","Roberto Scopigno"],"categories":null,"content":"","date":1041379200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1041379200,"objectID":"f3d42b8756d25dbeb69acc1affbe802f","permalink":"http://vcg.isti.cnr.it/publication/2003/CCGMPS03/","publishdate":"2003-01-01T00:00:00Z","relpermalink":"/publication/2003/CCGMPS03/","section":"publication","summary":"","tags":null,"title":"VCLab Tools for 3D range data processing","type":"publication"},{"authors":["Marco Tarini","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1041379200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1041379200,"objectID":"7a46b1e6eb1d2e97916c4066cbd43910","permalink":"http://vcg.isti.cnr.it/publication/2003/TCS03/","publishdate":"2003-01-01T00:00:00Z","relpermalink":"/publication/2003/TCS03/","section":"publication","summary":"","tags":null,"title":"Visibility based methods and assessment for detail-recovery","type":"publication"},{"authors":null,"categories":null,"content":"","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"6fcae98d7df3b6c44952e7b5fed181e3","permalink":"http://vcg.isti.cnr.it/software/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/software/","section":"","summary":"","tags":null,"title":"","type":"widget_page"},{"authors":["Paolo Cignoni"],"categories":null,"content":"lorem ipsum\n","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"4cfb8ee9140fcddb260ef09e1a619973","permalink":"http://vcg.isti.cnr.it/courses/geometry/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/courses/geometry/","section":"courses","summary":"lorem ipsum","tags":null,"title":"3D GEOMETRIC MODELING \u0026 PROCESSING 2021/2022","type":"courses"},{"authors":["Marco Callieri","Marco Potenziani"],"categories":["web"],"content":"","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"56e9120cb600c65c38952d3e7128b63d","permalink":"http://vcg.isti.cnr.it/software_apps/3dhop/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/software_apps/3dhop/","section":"software_apps","summary":"3DHOP _(3D Heritage Online Presenter)_ is an open-source framework for the creation of interactive Web presentations of high-resolution 3D models, oriented to the Cultural Heritage field. 3DHOP target audience ranges from the museum curators with some IT experience to the experienced Web designers who want to embed 3D contents in their creations, from students in the CH field to small companies developing web applications for museum and CH institutions.","tags":["Web"],"title":"3DHOP","type":"software_apps"},{"authors":["Francesco Laccone"],"categories":null,"content":"VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects. Activity on 3D acquisition started at VC Lab on mid ’90s; we have designed a low-cost 3D scanner and proposed many new algorithms for processing sampled 3D data.\nMost of those results later on have been incorporated in the MeshLab system, together with other geometry processing results. MeshLab is an open source system for processing and editing 3D triangular meshes; it has more than 10 years of life and a very consolidated and wide community of users (totalling more than 100,000 download every year).\nWe have been also active on some advanced 2D media, such as the Reflection Transformation Images (RTI):\nWe present below links and brief presentation of some recent results.\n","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"58618d810dab07a63290f26e47433b45","permalink":"http://vcg.isti.cnr.it/research/architecture/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/research/architecture/","section":"research","summary":"VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects.","tags":null,"title":"Architectural Geometry","type":"research"},{"authors":["Fabio Ganovelli"],"categories":null,"content":"lorem ipsum\n","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"31f06242dc96208d5282bc4b42a4cdec","permalink":"http://vcg.isti.cnr.it/courses/computer_graphics/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/courses/computer_graphics/","section":"courses","summary":"lorem ipsum","tags":null,"title":"COMPUTER GRAPHICS 2022/2023","type":"courses"},{"authors":["Luigi Malomo"],"categories":null,"content":"VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects. Activity on 3D acquisition started at VC Lab on mid ’90s; we have designed a low-cost 3D scanner and proposed many new algorithms for processing sampled 3D data.\nMost of those results later on have been incorporated in the MeshLab system, together with other geometry processing results. MeshLab is an open source system for processing and editing 3D triangular meshes; it has more than 10 years of life and a very consolidated and wide community of users (totalling more than 100,000 download every year).\nWe have been also active on some advanced 2D media, such as the Reflection Transformation Images (RTI):\nWe present below links and brief presentation of some recent results.\n","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"2efb2ff5abc48a2c4e60d6447ca78016","permalink":"http://vcg.isti.cnr.it/research/digital-fabrication/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/research/digital-fabrication/","section":"research","summary":"VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects.","tags":null,"title":"Digital Fabrication","type":"research"},{"authors":["Marco Callieri"],"categories":null,"content":"VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects. Activity on 3D acquisition started at VC Lab on mid ’90s; we have designed a low-cost 3D scanner and proposed many new algorithms for processing sampled 3D data.\nMost of those results later on have been incorporated in the MeshLab system, together with other geometry processing results. MeshLab is an open source system for processing and editing 3D triangular meshes; it has more than 10 years of life and a very consolidated and wide community of users (totalling more than 100,000 download every year).\nWe have been also active on some advanced 2D media, such as the Reflection Transformation Images (RTI):\nWe present below links and brief presentation of some recent results.\n","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"183c8a8fb8429babf6393ac86f20bf52","permalink":"http://vcg.isti.cnr.it/research/digitization/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/research/digitization/","section":"research","summary":"VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects.","tags":null,"title":"Digital Heritage","type":"research"},{"authors":["Massimiliano Corsini","gaia-pavoni"],"categories":null,"content":"Our activity on Geometry Processing includes methodologies for shape analysis and characterization, mesh parametrization and its applications. First, we aim to apply such techniques for re-meshing, compression and visualization.\n","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"6ff2cbb4d9694e38d4ca6993465301e9","permalink":"http://vcg.isti.cnr.it/research/environment-monitoring/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/research/environment-monitoring/","section":"research","summary":"Our activity on Geometry Processing includes methodologies for shape analysis and characterization, mesh parametrization and its applications. First, we aim to apply such techniques for re-meshing, compression and visualization.","tags":null,"title":"Environment Monitoring","type":"research"},{"authors":["Paolo Cignoni"],"categories":null,"content":"Our activity on Geometry Processing includes methodologies for shape analysis and characterization, mesh parametrization and its applications. First, we aim to apply such techniques for re-meshing, compression and visualization.\n","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"a34b7ccfbf374ebbd2e26ee895a687d3","permalink":"http://vcg.isti.cnr.it/research/geometry-processing/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/research/geometry-processing/","section":"research","summary":"Our activity on Geometry Processing includes methodologies for shape analysis and characterization, mesh parametrization and its applications. First, we aim to apply such techniques for re-meshing, compression and visualization.","tags":null,"title":"Geometry Processing","type":"research"},{"authors":["Matteo Bracci","Marco Tarini","Nico Pietroni","Marco Livesu","Paolo Cignoni"],"categories":["web"],"content":"","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"fd7e64cc19854c5cbd874753be288270","permalink":"http://vcg.isti.cnr.it/software_apps/hexalab/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/software_apps/hexalab/","section":"software_apps","summary":"HexaLab is a WebGL application for real time visualization, exploration and assessment of hexahedral meshes. This visualization tool targets both users and scholars. Practitioners who employ hexmeshes for Finite Element Analysis, can readily check mesh quality and assess its usability for simulation. Researchers involved in mesh generation may use HexaLab to perform a detailed analysis of the mesh structure, isolating weak points and testing new solutions to improve on the state of the art and generate high quality images. The system also offers immediate access to a repository containing all the publicly available meshes produced with the most recent techniques for hex mesh generation.","tags":["Web"],"title":"HexaLab","type":"software_apps"},{"authors":[],"categories":[],"content":"","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"c9849d28327f171e7481837e948b3187","permalink":"http://vcg.isti.cnr.it/software_apps/meshlab/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/software_apps/meshlab/","section":"software_apps","summary":"MeshLab is an open source, portable, and extensible system for the processing and editing of unstructured 3D triangular meshes. It also supports processing of raw data produced with 3D digitization tools/devices, providing a set of tools for editing, cleaning, healing, inspecting, rendering, texturing and converting this kind of models.","tags":[],"title":"MeshLab","type":"software_apps"},{"authors":null,"categories":null,"content":"","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"c1d17ff2b20dca0ad6653a3161942b64","permalink":"http://vcg.isti.cnr.it/people/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/people/","section":"","summary":"","tags":null,"title":"People","type":"landing"},{"authors":["Alessandro Muntoni","Paolo Cignoni"],"categories":[],"content":"","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"d2cff9ea49f6c76a84540b9562d6f318","permalink":"http://vcg.isti.cnr.it/software_libs/pymeshlab/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/software_libs/pymeshlab/","section":"software_libs","summary":"","tags":["software","libraries"],"title":"PyMeshLab","type":"software_libs"},{"authors":null,"categories":null,"content":"","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"c29e41198fe1dc5c85e66dbe4f2d7737","permalink":"http://vcg.isti.cnr.it/results/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/results/","section":"","summary":"","tags":null,"title":"Results","type":"widget_page"},{"authors":[],"categories":[],"content":"","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"b243a047f27846d321e3f7f2d813d77c","permalink":"http://vcg.isti.cnr.it/software_libs/vcglib/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/software_libs/vcglib/","section":"software_libs","summary":"","tags":[],"title":"VCGLib","type":"software_libs"},{"authors":["Daniela Giorgi"],"categories":null,"content":"Our activity on Geometry Processing includes methodologies for shape analysis and characterization, mesh parametrization and its applications. First, we aim to apply such techniques for re-meshing, compression and visualization.\n","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"e7ed0690bc4adad96ee4d7241a53f0d5","permalink":"http://vcg.isti.cnr.it/research/visual-learning/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/research/visual-learning/","section":"research","summary":"Our activity on Geometry Processing includes methodologies for shape analysis and characterization, mesh parametrization and its applications. First, we aim to apply such techniques for re-meshing, compression and visualization.","tags":null,"title":"Visual Learning","type":"research"},{"authors":["Gianpaolo Palma"],"categories":null,"content":"Our activity on Geometry Processing includes methodologies for shape analysis and characterization, mesh parametrization and its applications. First, we aim to apply such techniques for re-meshing, compression and visualization.\n","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"61ca8d5d1cc520690da2e3f7ec30b4cd","permalink":"http://vcg.isti.cnr.it/research/xr-advanced-ui/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/research/xr-advanced-ui/","section":"research","summary":"Our activity on Geometry Processing includes methodologies for shape analysis and characterization, mesh parametrization and its applications. First, we aim to apply such techniques for re-meshing, compression and visualization.","tags":null,"title":"XR and Advanced UI","type":"research"}] \ No newline at end of file +[{"authors":null,"categories":null,"content":"I am currently enrolled in the Italian National PhD in Artificial Intelligence at the University of Pisa. My research focuses on the development of AI-based tools for assisted architectual design, with the purpose of enhancing the architect’s creativity towards the production of buildable shapes.\n","date":1706745600,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1706745600,"objectID":"2d86b1749cfddae9355078f6d988aebe","permalink":"http://vcg.isti.cnr.it/author/Andrea-Favilli/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Andrea-Favilli/","section":"authors","summary":"I am currently enrolled in the Italian National PhD in Artificial Intelligence at the University of Pisa. My research focuses on the development of AI-based tools for assisted architectual design, with the purpose of enhancing the architect’s creativity towards the production of buildable shapes.","tags":null,"title":"Andrea Favilli","type":"authors"},{"authors":null,"categories":null,"content":"Daniela Giorgi is a Senior Researcher at the Visual Computing Lab at CNR-ISTI (National Research Council of Italy, Institute of Information Science and Technologies). Her research interests include Computer Graphics; 3D Shape Analysis; Computational Topology; Artificial Intelligence; Geometric and 3D Deep Learning. She has authored more than 70 peer-reviewed papers published in international journals and conferences. Currently, she is a WP Leader for the Horizon Europe Project SUN (Social and hUman ceNtered XR), and a Principal Investigator in the PNRR Extended Partnership FAIR - Future Artificial Intelligence Research. In 2022, she was elected President of the Italian Chapter of the European Association for Computer Graphics (Eurographics).\n","date":1706745600,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1706745600,"objectID":"98bc2bf762131f8a84cd136f728a5f12","permalink":"http://vcg.isti.cnr.it/author/Daniela-Giorgi/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Daniela-Giorgi/","section":"authors","summary":"Daniela Giorgi is a Senior Researcher at the Visual Computing Lab at CNR-ISTI (National Research Council of Italy, Institute of Information Science and Technologies). Her research interests include Computer Graphics; 3D Shape Analysis; Computational Topology; Artificial Intelligence; Geometric and 3D Deep Learning.","tags":null,"title":"Daniela Giorgi","type":"authors"},{"authors":null,"categories":null,"content":"I am Post-Doctoral Researcher at the ISTI - CNR in Pisa. My research focuses on Architectural Geometry, which is an interdisciplinary topic that aims to design, model, optimize, and manufacture complex free-form architectures through the tight collaboration and the synergy of several disciplines, such as differential geometry, algorithmic mathematics, computer graphics, engineering and industrial practice. I am also Adjunct Professor at the University of Pisa.\n","date":1706745600,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1706745600,"objectID":"d82644a7b8a8920bf3bd62dc5961b57d","permalink":"http://vcg.isti.cnr.it/author/Francesco-Laccone/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Francesco-Laccone/","section":"authors","summary":"I am Post-Doctoral Researcher at the ISTI - CNR in Pisa. My research focuses on Architectural Geometry, which is an interdisciplinary topic that aims to design, model, optimize, and manufacture complex free-form architectures through the tight collaboration and the synergy of several disciplines, such as differential geometry, algorithmic mathematics, computer graphics, engineering and industrial practice.","tags":null,"title":"Francesco Laccone","type":"authors"},{"authors":null,"categories":null,"content":"Dr. Luigi Malomo is a permanent researcher at the Visual Computing Laboratory of ISTI - CNR, in Pisa Italy. He received the PhD in Computer Science from the University of Pisa in April 2017. His research focuses mainly on Computational Fabrication and covers many topics related to computer graphics like geometry processing, human-computer interfaces, meshing and parametrizations. Currently, the scope of his research is to apply computational geometry knowledge to tangible applications like the optimization of manufacturing processes and physically-based geometric design.\n","date":1706745600,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1706745600,"objectID":"f465d64b94117bb5d1db37d5772afd28","permalink":"http://vcg.isti.cnr.it/author/Luigi-Malomo/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Luigi-Malomo/","section":"authors","summary":"Dr. Luigi Malomo is a permanent researcher at the Visual Computing Laboratory of ISTI - CNR, in Pisa Italy. He received the PhD in Computer Science from the University of Pisa in April 2017.","tags":null,"title":"Luigi Malomo","type":"authors"},{"authors":["paolo-cignoni"],"categories":null,"content":"Dr. Paolo Cignoni is a Research Director with CNR-ISTI where he leads the Visual Computing Laboratory. He received a Ph.D. Degree in Computer Science at the University of Pisa in 1998. He has been awarded “Best Young Researcher” by the Eurographics association in 2004. His research interests cover many Computer Graphics fields like geometry processing, 3D scanning data processing, digital fabrication, scientific visualisation and digital heritage. He teaches the main 3D Graphics course at the University of Pisa since more than 10 years.\nHe started and still leads the development of MeshLab, a widely known open source mesh processing tool used in hundreds of universities, research centers and companies by thousands of users. He has published more than one hundred papers in international refereed journals/conferences and has served in the program committee of all the most important conferences of Computer Graphics. He is member of Eurographics Executive Committee, and he has been in the Editorial Board of IEEE TVCG, Computer Graphics Forum, and ACM Journal on Computing and Cultural Heritage. A project\n","date":1706745600,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1706745600,"objectID":"0dcfef319fdb688d525c672763da8a51","permalink":"http://vcg.isti.cnr.it/author/Paolo-Cignoni/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Paolo-Cignoni/","section":"authors","summary":"Dr. Paolo Cignoni is a Research Director with CNR-ISTI where he leads the Visual Computing Laboratory. He received a Ph.D. Degree in Computer Science at the University of Pisa in 1998.","tags":null,"title":"Paolo Cignoni","type":"authors"},{"authors":null,"categories":null,"content":"Arslan Siddique joined Visual Computing Lab as a Marie Curie PhD fellow in EVOCATION ITN. Currently, he is in the final year of his PhD Computer Science at University of Pisa. His research focuses on Structure from Motion and 3D reconstruction. He is working on the development of MoReLab, which is a software for user-assisted 3D reconstruction.\n","date":1689552e3,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1689552e3,"objectID":"ca5a012ece1bf6c7c6cbf923d1e7fe16","permalink":"http://vcg.isti.cnr.it/author/Arslan-Siddique/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Arslan-Siddique/","section":"authors","summary":"Arslan Siddique joined Visual Computing Lab as a Marie Curie PhD fellow in EVOCATION ITN. Currently, he is in the final year of his PhD Computer Science at University of Pisa.","tags":null,"title":"Arslan Siddique","type":"authors"},{"authors":null,"categories":null,"content":"Francesco Banterle is a Researcher at the Visual Computing Laboratory at ISTI-CNR, Italy. He received a Ph.D. in Engineering from Warwick University in 2009. During his Ph.D. he developed Inverse Tone Mapping that bridges the gap between Low Dynamic Range Imaging and High Dynamic Range (HDR) Imaging. He holds two patents, one sold to Dolby, and the other one of these was transferred to goHDR, which he co-founded in 2009. His main research fields are high dynamic range (HDR) imaging (acquisition, tone mapping, HDR video compression, and HDR monitors), augmented reality on mobile, and rendering (global illumination, and image-based lighting). Recently, he has been working on applying Deep Learning to imaging; i.e., the distillation of perceptual metrics, efficient video structure-from-motion, and relighting of portraits.\n","date":1689552e3,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1689552e3,"objectID":"fb3a5bdff6f5bae4a4844a3a2033d92e","permalink":"http://vcg.isti.cnr.it/author/Francesco-Banterle/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Francesco-Banterle/","section":"authors","summary":"Francesco Banterle is a Researcher at the Visual Computing Laboratory at ISTI-CNR, Italy. He received a Ph.D. in Engineering from Warwick University in 2009. During his Ph.D. he developed Inverse Tone Mapping that bridges the gap between Low Dynamic Range Imaging and High Dynamic Range (HDR) Imaging.","tags":null,"title":"Francesco Banterle","type":"authors"},{"authors":null,"categories":null,"content":"Massimiliano Corsini is a senior researcher at the Visual Computing Laboratory of the ISTI-CNR in Pisa, Italy.\nFor several years, he worked on appearance and shape acquisition of real objects, advanced visualization for Cultural Heritage applications, and visual media productions. His current research regards the applications of Artificial Intelligence, Computer Graphics, and Computer Vision to Environmental Monitoring, Digital Humanities, Mobile Robotics, and Visual Analytics.\n","date":1689552e3,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1689552e3,"objectID":"35a03bee722ecfa4cf38765ff25e3a72","permalink":"http://vcg.isti.cnr.it/author/Massimiliano-Corsini/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Massimiliano-Corsini/","section":"authors","summary":"Massimiliano Corsini is a senior researcher at the Visual Computing Laboratory of the ISTI-CNR in Pisa, Italy.\nFor several years, he worked on appearance and shape acquisition of real objects, advanced visualization for Cultural Heritage applications, and visual media productions.","tags":null,"title":"Massimiliano Corsini","type":"authors"},{"authors":null,"categories":null,"content":"Fabio Ganovelli is a Senior Researcher at the Visual Computing Laboratory of ISTI-CNR (Institute of Science and Technologies of Information - National Research Council) in Pisa, Italy.\nHe holds a Ph.D. in computer science from the University of Pisa, and a Master’s Degree in computer science from the University of Pisa.\n","date":1672531200,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1672531200,"objectID":"00cfb31c892e8ded034fdf45a4aa595b","permalink":"http://vcg.isti.cnr.it/author/Fabio-Ganovelli/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Fabio-Ganovelli/","section":"authors","summary":"Fabio Ganovelli is a Senior Researcher at the Visual Computing Laboratory of ISTI-CNR (Institute of Science and Technologies of Information - National Research Council) in Pisa, Italy.\nHe holds a Ph.","tags":null,"title":"Fabio Ganovelli","type":"authors"},{"authors":["alessandro-muntoni"],"categories":null,"content":"I am a Research Fellow of the Visual Computing Lab of ISTI-CNR in Pisa.\nMy research is focused on Computer Graphics, mainly on Digital Fabrication and Geometry Processing. I am currently mantaining several software developed in the VCLab. The main ones are MeshLab and PyMeshLab.\nBefore joining the VCLab, I was part of the CG3HCI group of the University of Cagliari, where I earned my BSc, MSc and Ph.D.\nPersonal Website\n","date":1640995200,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1640995200,"objectID":"bf315040d80f18ff26173daeb57f4b2d","permalink":"http://vcg.isti.cnr.it/author/Alessandro-Muntoni/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Alessandro-Muntoni/","section":"authors","summary":"I am a Research Fellow of the Visual Computing Lab of ISTI-CNR in Pisa.\nMy research is focused on Computer Graphics, mainly on Digital Fabrication and Geometry Processing. I am currently mantaining several software developed in the VCLab.","tags":null,"title":"Alessandro Muntoni","type":"authors"},{"authors":null,"categories":null,"content":"I am a permanent researcher at the Visual Computing Lab ISTI-CNR. I am a researcher in the digital technologies used for documenting, managing, and enhancing Cultural Heritage for conservation work and museum exhibitions. I specialised in studying the ancient colour on the marble surface and using 2D/3D Computer Graphic techniques for the knowledge and the virtual reconstruction of the ancient polychromy. I have multidisciplinary training and I am a pioneer in my field of research. I graduated with honours in Cultural Heritage Preservation (Old Settlement, Restoration Techniques matter), I was a lecturer in the field of Museology applied to Archaeology and I holds a PhD in Classical Archaeology at the University of Pisa. At the same time, I obtained a 2nd level Master degree in Geographic Information Systems, I specialised in 2D/3D Computer Graphic techniques and deepened my studies in the field of diagnostic surveys for Cultural Heritage.\n","date":1640995200,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1640995200,"objectID":"07417bd181a746d795aac48738ea5cd0","permalink":"http://vcg.isti.cnr.it/author/Eliana-Siotto/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Eliana-Siotto/","section":"authors","summary":"I am a permanent researcher at the Visual Computing Lab ISTI-CNR. I am a researcher in the digital technologies used for documenting, managing, and enhancing Cultural Heritage for conservation work and museum exhibitions.","tags":null,"title":"Eliana Siotto","type":"authors"},{"authors":null,"categories":null,"content":"","date":1640995200,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1640995200,"objectID":"77a225e7a74437f40459d8d4e9d4a975","permalink":"http://vcg.isti.cnr.it/author/Federico-Ponchio/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Federico-Ponchio/","section":"authors","summary":"","tags":null,"title":"Federico Ponchio","type":"authors"},{"authors":null,"categories":null,"content":"I am a permanent researcher at the Visual Computing Lab - ISTI CNR.\nMy reserach interests are the acquisition, processing, and analysis of 3D/2D data to improve their use and understanding. I am working on 3D scanning, acquisition and modelling of real object surface appearance, analysis and visualization of the temporal 3D data for automatic change detection, non-rigid registration of 3D raw acquired data, approximation of the global illumination effects for real time rendering, user interface for Virtual Reality, web visualization of 3D/2D data.\n","date":1640995200,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1640995200,"objectID":"1143a9534daf236ba927154fb493927d","permalink":"http://vcg.isti.cnr.it/author/Gianpaolo-Palma/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Gianpaolo-Palma/","section":"authors","summary":"I am a permanent researcher at the Visual Computing Lab - ISTI CNR.\nMy reserach interests are the acquisition, processing, and analysis of 3D/2D data to improve their use and understanding.","tags":null,"title":"Gianpaolo Palma","type":"authors"},{"authors":null,"categories":null,"content":"I am a Senior Researcher at the Visual Computing Lab of ISTI-CNR (institute of Science and Technologies of Information - National Research Council), in Pisa. I have a Ph.D. and a Master’s Degree in Computer Science.\nMy main research activity is focused on the use of digital technologies and in particular, 3D computer graphics, in the Cultural Heritage field. I am an expert in 3D scanning and digitization of real-world objects, especially Cultural Heritage artifacts. I have extensive expertise in data processing and 3D model creation. I have worked a lot on methods for the color capture and photographic mapping onto 3D models. Currently, I am working on the web-based visualization of 3D models. I am a developer of MeshLab, and the main architect of 3DHOP. I have coordinated and carried out various 3D scanning campaigns, both in Italy and abroad.\n","date":1640995200,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1640995200,"objectID":"380186b760e19cf5c92d731dcc515b13","permalink":"http://vcg.isti.cnr.it/author/Marco-Callieri/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Marco-Callieri/","section":"authors","summary":"I am a Senior Researcher at the Visual Computing Lab of ISTI-CNR (institute of Science and Technologies of Information - National Research Council), in Pisa. I have a Ph.D. and a Master’s Degree in Computer Science.","tags":null,"title":"Marco Callieri","type":"authors"},{"authors":null,"categories":null,"content":"Marco Potenziani is a Researcher at the Visual Computing Laboratory of ISTI-CNR (Institute of Science and Technologies of Information - National Research Council) in Pisa, Italy.\nHe holds a Ph.D. in computer science from the University of Pisa, and a Master’s Degree in Information Engineering from the University of Siena.\nHis research interests include several fields of Computer Graphics. Cultural Heritage and scientific visualisation are the main application fields for the technologies developed.\nEngaged in several national and international research projects, developer of the open-source tool 3D Heritage Online Presenter (3DHOP), Associate Editor of the ACM Journal on Computing and Cultural Heritage (JOCCH), CNR expert for the Italian Ministry of Economic Development (MiSE) projects evaluation, he taught a course on “3D Graphics for Cultural Heritage” at the University of Pisa, and served as a reviewer and IPC member for several scientific conferences and journals.\n","date":1640995200,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1640995200,"objectID":"285b6869c8e2383020071c752d79659a","permalink":"http://vcg.isti.cnr.it/author/Marco-Potenziani/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Marco-Potenziani/","section":"authors","summary":"Marco Potenziani is a Researcher at the Visual Computing Laboratory of ISTI-CNR (Institute of Science and Technologies of Information - National Research Council) in Pisa, Italy.\nHe holds a Ph.D. in computer science from the University of Pisa, and a Master’s Degree in Information Engineering from the University of Siena.","tags":null,"title":"Marco Potenziani","type":"authors"},{"authors":null,"categories":null,"content":"I am a permanent researcher at the Visual Computing Lab - ISTI CNR. My research interests are: 3D acquisition, processing and analysis of data, Cultural Heritage applications, interactive graphics, virtual reality, optical metrology techniques for the study and the conservation of Cultural Heritage\n","date":1640995200,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":1640995200,"objectID":"076167febc016ba4532a24784ac9bfb9","permalink":"http://vcg.isti.cnr.it/author/Paolo-Pingi/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Paolo-Pingi/","section":"authors","summary":"I am a permanent researcher at the Visual Computing Lab - ISTI CNR. My research interests are: 3D acquisition, processing and analysis of data, Cultural Heritage applications, interactive graphics, virtual reality, optical metrology techniques for the study and the conservation of Cultural Heritage","tags":null,"title":"Paolo Pingi","type":"authors"},{"authors":null,"categories":null,"content":"I am Post-Doctoral Researcher at the ISTI - CNR in Pisa. My research investigates the interface between architecture, geometry, computational design, and digital fabrication. I pursued my PhD in the Applied Geometry Group at TU Wien, and I worked as post-doc in the Geometric Computing Lab at EPFL.\n","date":-62135596800,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":-62135596800,"objectID":"fa22852a810090391d3e7ade206a9d4c","permalink":"http://vcg.isti.cnr.it/author/Davide-Pellis/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Davide-Pellis/","section":"authors","summary":"I am Post-Doctoral Researcher at the ISTI - CNR in Pisa. My research investigates the interface between architecture, geometry, computational design, and digital fabrication. I pursued my PhD in the Applied Geometry Group at TU Wien, and I worked as post-doc in the Geometric Computing Lab at EPFL.","tags":null,"title":"Davide Pellis","type":"authors"},{"authors":null,"categories":null,"content":"I am a ………… ……. … ………… …. … ….. ……… …… …. ……….\n………… ……. … ………… …. … ….. ……… …… …. ………. ………… ……. … ………… …. … ….. ……… …… …. …………………. ……. … ………… …. … ….. ……… …… …. …………………. ……. … ………… …. … ….. ……… …… …. ………. ………… ……. … ………… …. … ….. ……… …… …. …………………. ……. … ………… …. … ….. ……… …… …. ………. ………… ……. … ………… …. … ….. ……… …… …. …………………. ……. … …… …… …. … ….. ……… …… …. …………………. ……. … ………… …. … ….. ……… …… …. ……….\n","date":-62135596800,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":-62135596800,"objectID":"23a972b6b781857ec80d3f700eaff7fa","permalink":"http://vcg.isti.cnr.it/author/Elena-Scandurra/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Elena-Scandurra/","section":"authors","summary":"I am a ………… ……. … ………… …. … ….. ……… …… …. ……….\n………… ……. … ………… …. … ….. ……… …… …. ………. ………… ……. … ………… …. … ….","tags":null,"title":"Elena Scandurra","type":"authors"},{"authors":null,"categories":null,"content":"I am a PhD student of the Visual Computing Lab of ISTI-CNR in Pisa.\nI graduated from the Master’s Degree program in Biomedical Engineering at the University of Pisa. During my master’s thesis, i dealt with the generation of artificial mammograms through Image-to-Image Translation techniques.\nMy main research activity is focused on the use of NeRFs in the biomedical field.\n","date":-62135596800,"expirydate":-62135596800,"kind":"term","lang":"en","lastmod":-62135596800,"objectID":"0fb034b5749de3f22bac6305cf9f0d8e","permalink":"http://vcg.isti.cnr.it/author/Valentina-Piras/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/author/Valentina-Piras/","section":"authors","summary":"I am a PhD student of the Visual Computing Lab of ISTI-CNR in Pisa.\nI graduated from the Master’s Degree program in Biomedical Engineering at the University of Pisa. During my master’s thesis, i dealt with the generation of artificial mammograms through Image-to-Image Translation techniques.","tags":null,"title":"Valentina Piras","type":"authors"},{"authors":null,"categories":null,"content":"\nThe Visual Computing Lab is a research group of the CNR-ISTI (Italian National Research Council - Institute for Information Science and Technology) in Pisa, Italy. The lab is headed by Paolo Cignoni, and is located in the CNR-ISTI building in the CNR Research Area in Pisa, Italy.\n","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"3091162792d020de95c92f946d120cd4","permalink":"http://vcg.isti.cnr.it/home/welcome/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/home/welcome/","section":"home","summary":"The Visual Computing Lab is a research group of the CNR-ISTI (Italian National Research Council - Institute for Information Science and Technology) in Pisa, Italy. The lab is headed by Paolo Cignoni, and is located in the CNR-ISTI building in the CNR Research Area in Pisa, Italy.","tags":null,"title":"Visual Computing Laboratory\n","type":"home"},{"authors":[],"categories":null,"content":"Slides can be added in a few ways:\nCreate slides using Wowchemy’s Slides feature and link using slides parameter in the front matter of the talk file Upload an existing slide deck to static/ and link using url_slides parameter in the front matter of the talk file Embed your slides (e.g. Google Slides) or presentation video on this page using shortcodes. Further event details, including page elements such as image galleries, can be added to the body of this page.\n","date":1906549200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1906549200,"objectID":"a8edef490afe42206247b6ac05657af0","permalink":"http://vcg.isti.cnr.it/event/example/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/event/example/","section":"event","summary":"An example event.","tags":[],"title":"Example Event","type":"event"},{"authors":["Andrea Favilli","Francesco Laccone","Paolo Cignoni","Luigi Malomo","Daniela Giorgi"],"categories":null,"content":"","date":1706745600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1706745600,"objectID":"2e3e1c5b51a036b7d07c01f5ad8b4106","permalink":"http://vcg.isti.cnr.it/publication/2024/FLCMG24-GeometricLearningxShells/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2024/FLCMG24-GeometricLearningxShells/","section":"publication","summary":"This paper introduces a novel method for shape optimization and form-finding of free-form, triangular grid shells, based on geometric deep learning. We define an architecture which consumes a 3D mesh representing the initial design of a free-form grid shell, and outputs vertex displacements to get an optimized grid shell that minimizes structural compliance, while preserving design intent. The main ingredients of the architecture are layers that produce deep vertex embeddings from geometric input features, and a differentiable loss implementing structural analysis. We evaluate the method performance on a benchmark of eighteen free-form grid shell structures characterized by various size, geometry, and tessellation. Our results demonstrate that our approach can solve the shape optimization and form finding problem for a diverse range of structures, more effectively and efficiently than existing common tools.","tags":["Architectural Geometry","Grid Shells","Shape Optimization","Form Finding","evocation","Sun"],"title":"Geometric deep learning for statics-aware grid shells","type":"publication"},{"authors":["Arslan Siddique","Francesco Banterle","Massimiliano Corsini","Paolo Cignoni","Daniel Sommerville","Chris Joffe"],"categories":null,"content":"The source code for MoReLab can be found on our Github repository.\n","date":1689552e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1689552e3,"objectID":"075599ad243ea8102ce696acc88e30a0","permalink":"http://vcg.isti.cnr.it/publication/2023/SBC23-MoReLab/","publishdate":"2023-07-17T00:00:00Z","relpermalink":"/publication/2023/SBC23-MoReLab/","section":"publication","summary":"A software for user-assisted 3D reconstruction.","tags":["Source Themes"],"title":"MoReLab: A Software for User-Assisted 3D Reconstruction","type":"publication"},{"authors":["Andrea Maggiordomo","Paolo Cignoni","Marco Tarini"],"categories":null,"content":"","date":1677542400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1677542400,"objectID":"ab7b9d65e573903605051afa2efef60c","permalink":"http://vcg.isti.cnr.it/publication/2023/MCT23-TextureInpainting/","publishdate":"2023-02-28T00:00:00Z","relpermalink":"/publication/2023/MCT23-TextureInpainting/","section":"publication","summary":"We devise a technique designed to remove the texturing artefacts that are typical of 3D models representing real-world objects, acquired by photogrammetric techniques. Our technique leverages the recent advancements in inpainting of natural colour images, adapting them to the specific context. A neural network, modified and trained for our purposes, replaces the texture areas containing the defects, substituting them with new plausible patches of texels, reconstructed from the surrounding surface texture. We train and apply the network model on locally reparametrized texture patches, so to provide an input that simplifies the learning process, because it avoids any texture seams, unused texture areas, background, depth jumps and so on. We automatically extract appropriate training data from real-world datasets. We show two applications of the resulting method: one, as a fully automatic tool, addressing all problems that can be detected by analysing the UV-map of the input model; and another, as an interactive semi-automatic tool, presented to the user as a 3D ‘fixing’ brush that has the effect of removing artefacts from any zone the users paints on. We demonstrate our method on a variety of real-world inputs and provide a reference usable implementation. ","tags":null,"title":"Texture Inpainting for Photogrammetric Models","type":"publication"},{"authors":[],"categories":[],"content":"","date":1674207548,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1674207548,"objectID":"5f856bad9a0438ade5ae7cef7421f2a6","permalink":"http://vcg.isti.cnr.it/project/evocation/","publishdate":"2023-01-20T10:39:08+01:00","relpermalink":"/project/evocation/","section":"project","summary":"","tags":[],"title":"Evocation","type":"project"},{"authors":[],"categories":[],"content":"","date":1674207548,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1674207548,"objectID":"c9a08ffe9af217e3c97802bcf89ec488","permalink":"http://vcg.isti.cnr.it/project/sun/","publishdate":"2023-01-20T10:39:08+01:00","relpermalink":"/project/sun/","section":"project","summary":"","tags":[],"title":"SUN-XR","type":"project"},{"authors":["Somnath Dutta","Fabio Ganovelli","Paolo Cignoni"],"categories":null,"content":"","date":1672531200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1672531200,"objectID":"a33157f0a154583c7cc9c0724df7185a","permalink":"http://vcg.isti.cnr.it/publication/2023/DGC23-NausicaaSystem/","publishdate":"2023-01-01T00:00:00Z","relpermalink":"/publication/2023/DGC23-NausicaaSystem/","section":"publication","summary":"","tags":null,"title":"On-the-fly Acquisition and Rendering with Low Cost Lidar and RGB Cameras for Marine Navigation","type":"publication"},{"authors":null,"categories":null,"content":"","date":1666569600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1666569600,"objectID":"6d99026b9e19e4fa43d5aadf147c7176","permalink":"http://vcg.isti.cnr.it/contact/","publishdate":"2022-10-24T00:00:00Z","relpermalink":"/contact/","section":"","summary":"","tags":null,"title":"Contact","type":"landing"},{"authors":null,"categories":null,"content":"","date":1666569600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1666569600,"objectID":"b0d61e5cbb7472bf320bf0ef2aaeb977","permalink":"http://vcg.isti.cnr.it/tour/","publishdate":"2022-10-24T00:00:00Z","relpermalink":"/tour/","section":"","summary":"","tags":null,"title":"Tour","type":"landing"},{"authors":["Marco Cococcioni","Marco Grazzi","Le Li","Federico Ponchio"],"categories":null,"content":"","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"504ed7a538fcffdeca3a15ea11638a9d","permalink":"http://vcg.isti.cnr.it/publication/2022/CGLP22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/CGLP22/","section":"publication","summary":"","tags":null,"title":"A toolbox for measuring heterogeneity and efficiency using zonotopes","type":"publication"},{"authors":["Iason Manolas","Francesco Laccone","Gianmarco Cherchi","Luigi Malomo","Paolo Cignoni"],"categories":null,"content":" ","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"c248191c67584e5ae96b2fc3b6650696","permalink":"http://vcg.isti.cnr.it/publication/2022/MLCMC22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/MLCMC22/","section":"publication","summary":"The computational fabrication community is developing an increasing interest in the use of patterned surfaces, which can be designed to show ornamental and unconventional aesthetics or to perform as a proper structural material with a wide range of features. Geometrically designing and controlling the deformation capabilities of these patterns in response to external stimuli is a complex task due to the large number of variables involved. This paper introduces a method for generating sets of tileable and exchangeable flat patterns as well as a model-reduction strategy that enables their mechanical simulation at interactive rates. This method is included in a design pipeline that aims to turn any general flat surface into a pattern tessellation, which is able to deform under a given loading scenario. To validate our approach, we apply it to different contexts, including real-scale 3D printed specimens, for which we compare our results with the ones provided by a ground-truth solver.","tags":null,"title":"Automated generation of flat tileable patterns and 3D reduced model simulation","type":"publication"},{"authors":["Marco Potenziani","Federico Ponchio","Marco Callieri","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"fdc063acfcc502b85359d9b6d2be20c1","permalink":"http://vcg.isti.cnr.it/publication/2022/PPCCS22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/PPCCS22/","section":"publication","summary":"","tags":null,"title":"Cultural Heritage 3D Data on the Web: Issues and Perspectives","type":"publication"},{"authors":["Francesco Laccone","Luigi Malomo","Marco Callieri","Thomas Alderighi","Alessandro Muntoni","Federico Ponchio","Nico Pietroni","Paolo Cignoni"],"categories":null,"content":" ","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"1f8c7401551020e40b825b2eeed3058f","permalink":"http://vcg.isti.cnr.it/publication/2022/LMCAMPPC22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/LMCAMPPC22/","section":"publication","summary":"Mesostructured patterns are a modern and efficient concept based on designing the geometry of structural material at the meso-scale to achieve desired mechanical performances. In the context of bending-active structures, such a concept can be used to control the flexibility of the panels forming a surface without changing the constituting material. These panels undergo a formation process of deformation by bending, and application of internal restraints. This paper describes a new constructional system, FlexMaps, that has initiated the adoption of bending-active mesostructures at the architectural scale. Here, these modules are in the form of four-arms spirals made of CNC-milled plywood and are designed to reach the desired target shape once assembled. All phases from the conceptual design to the fabrication are seamlessly linked within an automated workflow. To illustrate the potential of the system, the paper discusses the results of a demonstrator project entitled FlexMaps Pavilion (3.90x3.96x3.25 meters) that has been exhibited at the IASS Symposium in 2019 and more recently at the 2021 17th International Architecture Exhibition, La Biennale di Venezia. The structural response is investigated through a detailed structural analysis, and the long-term behavior is assessed through a photogrammetric survey. For more details on the prototype, please visit this webpage Our pavilion has been exhibited in the Italian pavilion of the 2021 17th Biennale Architettura in Venice","tags":null,"title":"Design and construction of a bending-active plywood structure: the Flexmaps Pavilion","type":"publication"},{"authors":["Antonella Camarda","Marco Callieri","Fabio Bettio","Giuliana Altea","Moonisa Ahsan","Paolo Cignoni","Enrico Gobbetti","Paolo Ledda","Alessandro Lutzu","Fabio Marton","Giuseppe Mignemi","Federico Ponchio"],"categories":null,"content":" ","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"ce93289e11350a09f3720b49ae74a618","permalink":"http://vcg.isti.cnr.it/publication/2022/AABCCCGLLMMP22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/AABCCCGLLMMP22/","section":"publication","summary":" ","tags":null,"title":"Ebb \u0026 Flow: Uncovering Costantino Nivola s Olivetti Sandcast through 3D Fabrication and Virtual Exploration","type":"publication"},{"authors":["Francesco Laccone","Iason Manolas","Luigi Malomo","Paolo Cignoni"],"categories":null,"content":" ","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"73170c68a1d26f4e0d0c36d014761bae","permalink":"http://vcg.isti.cnr.it/publication/2022/LMMC22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/LMMC22/","section":"publication","summary":"Recycled HDPE plastic can be obtained from up to 100% waste material and can be produced in the shape of panels and rods. The aim of this work is to explore the possibility to employ this material for structural purposes. The proposed concept for segmented shells is based on the cassette system, namely a spatial waffle structure clamped by inner and outer plates, and a shaping strategy of the shell cross section targeted on bending. The concept is applied on translational surfaces, in which the transverse cross section serves as the shaping objective. A digital workflow is implemented to explore the possible solutions and to evaluate the shells' feasibility from both a fabrication and a structural point of view. A case study of 5.2 meters is further explored with nonlinear analysis.","tags":null,"title":"Exploratory study on a segmented shell made of recycled-HDPE plastic","type":"publication"},{"authors":["Costanza Cucci","Marco Potenziani","Fauzia Albertin","Chiara Ruberto","Marcello Picollo","Lorenzo Stefani","Marco Callieri","Eliana Siotto","Paolo Pingi","Roberto Scopigno","Lisa Castelli","Francesco Taccetti","Matteo Bettuzzi","Rosa Brancaccio","Maria Pia Morigi","Francesca De Vita"],"categories":null,"content":"","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"c408089a2232072f7dd91eecd8545caf","permalink":"http://vcg.isti.cnr.it/publication/2022/CPARPSCSPSCTBBMD22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/CPARPSCSPSCTBBMD22/","section":"publication","summary":"","tags":null,"title":"Leafing through the painting “Ecce Homo” by Antonello da Messina: multimodal imaging techniques and data-fusion","type":"publication"},{"authors":["Gaia Pavoni","Francesca Giuliani","Anna De Falco","Massimiliano Corsini","Federico Ponchio","Marco Callieri","Paolo Cignoni"],"categories":null,"content":" ","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"0d372162b53fbd23e64e69a1a73cc741","permalink":"http://vcg.isti.cnr.it/publication/2022/PGDCPCC22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/PGDCPCC22/","section":"publication","summary":" ","tags":null,"title":"On assisting and automatizing the semantic segmentation of masonry walls","type":"publication"},{"authors":["Stefano Nuvoli","Nico Pietroni","Paolo Cignoni","Riccardo Scateni","Marco Tarini"],"categories":null,"content":" https://doi.org/10.1145/3550454.3555503 ","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"2d6c5574683bd4636b59b69a816edc0c","permalink":"http://vcg.isti.cnr.it/publication/2022/NPCST22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/NPCST22/","section":"publication","summary":"We propose a novel technique to compose new 3D animated models, such as videogame characters, by combining pieces from existing ones. Our method works on production-ready rigged, skinned, and animated 3D models to reassemble new ones. We exploit mix-and-match operations on the skeletons to trigger the automatic creation of a new mesh, linked to the new skeleton by a set of skinning weights and complete with a set of animations. The resulting model preserves the quality of the input meshings (which can be quad-dominant and semi-regular), skinning weights (inducing believable deformation), and animations, featuring coherent movements of the new skeleton. Our method enables content creators to reuse valuable, carefully designed assets by assembling new ready-to-use characters while preserving most of the hand-crafted subtleties of models authored by digital artists. As shown in the accompanying video, it allows for drastically cutting the time needed to obtain the final result. https://doi.org/10.1145/3550454.3555503","tags":null,"title":"SkinMixer: Blending 3D Animated Models","type":"publication"},{"authors":["Thomas Alderighi","Luigi Malomo","Thomas Auzinger","Bernd Bickel","Paolo Cignoni","Nico Pietroni"],"categories":null,"content":"","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"746bd23d5de6925229da739a06bb7c9b","permalink":"http://vcg.isti.cnr.it/publication/2022/AMABCP22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/AMABCP22/","section":"publication","summary":"Moulding refers to a set of manufacturing techniques in which a mould, usually a cavity or a solid frame, is used to shape a liquid or pliable material into an object of the desired shape. The popularity of moulding comes from its effectiveness, scalability and versatility in terms of employed materials. Its relevance as a fabrication process is demonstrated by the extensive literature covering different aspects related to mould design, from material flow simulation to the automation of mould geometry design. In this state-of-the-art report, we provide an extensive review of the automatic methods for the design of moulds, focusing on contributions from a geometric perspective. We classify existing mould design methods based on their computational approach and the nature of their target moulding process. We summarize the relationships between computational approaches and moulding techniques, highlighting their strengths and limitations. Finally, we discuss potential future research directions. The published version is available at the following link https://doi.org/10.1111/cgf.14581","tags":null,"title":"State of the Art in Computational Mould Design","type":"publication"},{"authors":["Gianpaolo Palma","Paolo Pingi","Eliana Siotto"],"categories":null,"content":"","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"28714cb61cdd648dcd53c099ef19a83b","permalink":"http://vcg.isti.cnr.it/publication/2022/PPS22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/PPS22/","section":"publication","summary":"","tags":null,"title":"Temporal Deformation Analysis of 3D Models as Diagnostic Tool for Panel Paintings","type":"publication"},{"authors":["Paolo Pingi","Eliana Siotto"],"categories":null,"content":"","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"c45fad7d44757ec837b44c0e28dfc0b7","permalink":"http://vcg.isti.cnr.it/publication/2022/PS22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/PS22/","section":"publication","summary":"","tags":null,"title":"Un modello 3D per lo studio ed il monitoraggio","type":"publication"},{"authors":["Maurizio Froli","Paolo Cignoni","Luigi Malomo","Domenico Gaudioso","Francesco Laccone"],"categories":null,"content":"","date":1640995200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1640995200,"objectID":"68744ff00ac71764b3bdc88c11c98d6d","permalink":"http://vcg.isti.cnr.it/publication/2022/LGMCF22/","publishdate":"2022-01-01T00:00:00Z","relpermalink":"/publication/2022/LGMCF22/","section":"publication","summary":"In the context of tall building design, the tube concept represents one of the most performing systems. The diagrid is the widespread type of tube system and consists of a diagonal grid of beams that wraps the building, forming a diamond pattern. It performs as lateral bracing and is additionally able to sustain vertical loading through axial forces. Despite its efficiency, a growing interest is recently observed in alternative geometries to replace the diagrid pattern and improve the architectural impact conferred by the building skin aesthetics on the urban environment. The paper pursues the use of a Voronoi mesh, in which the geometry of the cells is steered to known schemes for the structural design of a cantilever tube structure. The objective is to mimic a macroscopic structural behavior through a topology and size modification of the Voronoi mesh that increases the density for creating resisting paths with higher stiffness. The paper proposes a novel method Vorogrid for designing a new class of tall buildings equipped with an organic-looking and mechanically-sound tube structure, which makes them a valuable alternative to competitors (diagrid, hexagrid, random Voronoi). Diagrids and hexagrids still remain more efficient in terms of forces and displacements but are characterized by a more usual appearance, instead Vorogrid offers more design control and better performances on average with respect to random Voronoi structures. This method is streamed into a pipeline that includes grid initialization strategies, geometric and structural optimization to mitigate the effects of the grid randomness, and structural sizing.","tags":["Architectural Geometry","Structural Optimization"],"title":"Vorogrid: A static-aware variable-density Voronoi mesh to design the tube structure tessellation of tall buildings","type":"publication"},{"authors":null,"categories":null,"content":"Eurographics conferred to VC Lab Head Paolo Cignoni the 2021 Outstanding Technical Contributions Award for his extraordinary technical contribution to 3D graphics!\n","date":1618963200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1618963200,"objectID":"deaef6e335076fa513ab29d79c122fd5","permalink":"http://vcg.isti.cnr.it/post/21-04-21-paolo-cignoni-award/","publishdate":"2021-04-21T00:00:00Z","relpermalink":"/post/21-04-21-paolo-cignoni-award/","section":"post","summary":"Eurographics conferred to VC Lab Head Paolo Cignoni the 2021 Outstanding Technical Contributions Award for his extraordinary technical contribution to 3D graphics!","tags":null,"title":"Paolo Cignoni: Outstanding Technical Contributions Award","type":"post"},{"authors":["Fauzia Albertin","Chiara Ruberto","Costanza Cucci","Marco Callieri","Marco Potenziani","Eliana Siotto","Paolo Pingi","Roberto Scopigno","Matteo Bettuzzi","Rosa Brancaccio","Maria Pia Morigi","Lisa Castelli","Francesco Taccetti","Marcello Picollo","Lorenzo Stefani","Francesca De Vita"],"categories":null,"content":" ","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"ad47a6a7e4a4602b7074cc7bc86942ec","permalink":"http://vcg.isti.cnr.it/publication/2021/ARCCPSPSBBMCTPSD21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/ARCCPSPSBBMCTPSD21/","section":"publication","summary":"Scientific investigations of artworks are crucial in terms of preservation since they provide a measurable evaluation of the materials and the state of conservation. This is the case of Antonello da Messina's painting 'Ecce Homo': its delicate state of conservation, with the need for constant monitoring, required a broad and in-depth diagnostic campaign to support the restorers. The project was carried out entirely in situ using non-invasive cutting-edge techniques and proposes a multimodal and data-centric approach, integrating 3D and 2D methodologies. The surface irregularities and the support were analysed with a structured-light 3D scanner and X-ray tomography. The painting materials were investigated with X-ray fluorescence scanning (MA-XRF) and reflectance hyperspectral imaging (HSI). Primarily, the data were jointly used for a scientific scope and provided new knowledge of the painting in terms of materials and painting techniques. In addition, two web-based interactive platforms were developed: one to provide restorers and experts with a new perspective of the hidden geometries of the painting, and the other targeted at the general public for dissemination purposes. The results of the Ecce Homo scientific analysis were exhibited, using a touch-screen interface, and developed for different user levels, from adults to kids.","tags":null,"title":"“Ecce Homo” by Antonello da Messina, from non-invasive investigations to data fusion and dissemination","type":"publication"},{"authors":["Daniele Fornari","Luigi Malomo","Paolo Cignoni"],"categories":null,"content":" ","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"1c3e988b40c17c6166c87c5f58eaed02","permalink":"http://vcg.isti.cnr.it/publication/2021/FMC21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/FMC21/","section":"publication","summary":"The interaction between a 2D input device (like a mouse or a touchscreen) and a 3D object on the screen with the purpose of examining it in detail is a well-studied interaction problem. The inherent difference in degrees of freedom between input devices and possible 3D transformations makes it difficult to intuitively map inputs to operations to be performed on 3D objects. Although, over the years, studies led to a wide variety of solutions to overcome this problem, most of them are not actually available in real-world applications. In particular, for 3D web applications, only basic solutions are often implemented, and even the most used web framework for 3D still lacks state of the art implementations. We will face the problem of 3D interaction through touch and mouse input, and we propose our implementation of a 3D view manipulator for web applications, which offers a natural control, advanced functionalities, and provides an easy-to-use interface for both desktop and mobile environments.","tags":null,"title":"A High Quality 3D Controller for Mobile and Desktop Web Applications","type":"publication"},{"authors":["Gianpaolo Palma","Sara Perry","Paolo Cignoni"],"categories":null,"content":" ","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"f4cf8609beba0771597bf108b2beb8bb","permalink":"http://vcg.isti.cnr.it/publication/2021/PPC21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/PPC21/","section":"publication","summary":"Virtual reality (VR) technologies have become more and more affordable and popular in the last five years thanks to hardware and software advancements. A critical issue for these technologies is finding paradigms that allow user interactions in ways that are as similar as possible to the real world, bringing physicality into the experience. Current literature has shown, with different experiments, that the mapping of real objects in virtual reality alongside haptic feedback significantly increases the realism of the experience and user engagement, leading to augmented virtuality. In this paper, we present a system to improve engagement in a VR experience using inexpensive, physical, and sensorized copies of real artefacts made with cheap 3D fabrication technologies. Based on a combination of hardware and software components, the proposed system gives the user the possibility to interact with the physical replica in the virtual environment and to see the appearance of the original cultural heritage artefact. In this way, we overcome one of the main limitations of mainstream 3D fabrication technologies: a faithful appearance reproduction. Using a consumer device for the real-time hand tracking and a custom electronic controller for the capacitive touch sensing, the system permits the creation of augmented experiences where the user with their hands can change the virtual appearance of the real replica object using a set of personalization actions selectable from a physical 3D-printed palette.","tags":null,"title":"Augmented Virtuality Using Touch-Sensitive 3D-Printed Objects","type":"publication"},{"authors":["Stefano Nuvoli","Alessandro Tola","Alessandro Muntoni","Nico Pietroni","Enrico Gobbetti","Riccardo Scateni"],"categories":null,"content":"","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"78ce8e9a852c0cb419f01ee3c503fb8e","permalink":"http://vcg.isti.cnr.it/publication/2021/NTMPGS21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/NTMPGS21/","section":"publication","summary":"","tags":null,"title":"Automatic surface segmentation for seamless fabrication using 4-axis milling machines","type":"publication"},{"authors":["Gaia Pavoni","Massimiliano Corsini","Nicole Pedersen","Vid Petrovic","Paolo Cignoni"],"categories":null,"content":" ","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"c49940461af31a07403751f61dd15347","permalink":"http://vcg.isti.cnr.it/publication/2021/PCPPC21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/PCPPC21/","section":"publication","summary":" ","tags":null,"title":"Challenges in the deep learning-based semantic segmentation of benthic communities from Ortho-images","type":"publication"},{"authors":["Thomas Alderighi","Daniela Giorgi","Luigi Malomo","Paolo Cignoni","Monica Zoppè"],"categories":null,"content":" ","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"4603ec0c657b5fc46bc067b788d7c9d5","permalink":"http://vcg.isti.cnr.it/publication/2021/AGMCZ21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/AGMCZ21/","section":"publication","summary":"Tangible 3D molecular models conceptualize complex phenomena in a stimulating and engaging format. This is especially true for learning environments, where additive manufacturing is increasingly used to produce teaching aids for chemical education. However, the 3D models presented previously are limited in the type of molecules they can represent and the amount of information they carry. In addition, they have little role in representing complex biological entities such as proteins. We present the first complete workflow for the fabrication of soft models of complex proteins of any size. We leverage on molding technologies to generate accurate, soft models which incorporate both spatial and functional aspects of large molecules. Our method covers the whole pipeline from molecular surface preparation and editing to actual 3D model fabrication. The models fabricated with our strategy can be used as aids to illustrate biological functional behavior, such as assembly in quaternary structure and docking mechanisms, which are difficult to convey with traditional visualization methods. We applied the proposed framework to fabricate a set of 3D protein models, and we validated the appeal of our approach in a classroom setting.","tags":null,"title":"Computational design, fabrication and evaluation of rubber protein models","type":"publication"},{"authors":["Paolo Pingi","Eliana Siotto","Gianpaolo Palma","Roberto Scopigno"],"categories":null,"content":"","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"231811c62adbdcac80e83c40045791bc","permalink":"http://vcg.isti.cnr.it/publication/2021/PSPS21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/PSPS21/","section":"publication","summary":"","tags":null,"title":"Documentation and analysis of the deformations of the panel and painted surface with 3D scanning","type":"publication"},{"authors":["Fredrik Ekengren","Marco Callieri","Domenica Dininno","Åsa Berggren","Stella Macheridis","Nicolo Dell Unto"],"categories":null,"content":" ","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"4b69f542d26a06da037ab75fdd5cea70","permalink":"http://vcg.isti.cnr.it/publication/2021/ECDBMD21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/ECDBMD21/","section":"publication","summary":" ","tags":null,"title":"Dynamic Collections: A 3D Web Infrastructure for Artifact Engagement","type":"publication"},{"authors":["Arslan Siddique","Massimiliano Corsini","Fabio Ganovelli","Paolo Cignoni"],"categories":null,"content":"","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"a9a24c14a2f5889f0637114441c25b92","permalink":"http://vcg.isti.cnr.it/publication/2021/SCGC21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/SCGC21/","section":"publication","summary":"","tags":null,"title":"Evaluating Deep Learning Methods for Low Resolution Point Cloud Registration in Outdoor Scenarios","type":"publication"},{"authors":["Linda Giresini","Mario Lucio Puppio","Francesco Laccone","Maurizio Froli"],"categories":null,"content":"https://doi.org/10.1080/13632469.2021.1964646\n","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"13bc6a2bd4669b81a6e0a0a61a0f38f8","permalink":"http://vcg.isti.cnr.it/publication/2021/GPLF21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/GPLF21/","section":"publication","summary":"This paper illustrates the results of an experimental campaign performed on a scale prototype of a base dissipator called Mini Tribological ROCKing Seismic Isolation Device. This device allows a smooth, controlled and damped rocking by means of frictional layers and viscous elastic springs, which aim at decoupling the frequencies of the superstructure, at dissipating energy during motion and at re-centering the system once the external action vanishes. Four superstructures are tested a shear type frame, braced and unbraced, a multi-story frame and a SDOF oscillator with 96 ambient vibration and impulsive tests. An analytical model is illustrated and validated by the experimental tests. The reduction of relative displacement demand is analyzed for all the cases together with the reduction of the acceleration demand, showing positive effects of the base dissipator on the dynamic behavior of all the superstructures. https://doi.org/10.1080/13632469.2021.1964646","tags":null,"title":"Experimental and numerical investigation on a passive control system for the mitigation of vibrations on SDOF and MDOF Structures: mini Tribological ROCKing Seismic Isolation Device (miniTROCKSISD)","type":"publication"},{"authors":["Francesco Laccone","Luigi Malomo","Nico Pietroni","Paolo Cignoni","Tim Schork"],"categories":null,"content":" webpage\nhttps://doi.org/10.1016/j.istruc.2021.08.004\n","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"74d53bfda3a763770622f9a1011f6baa","permalink":"http://vcg.isti.cnr.it/publication/2021/LMPCS21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/LMPCS21/","section":"publication","summary":"This paper introduces an integrated computational design framework for the design and realization of arbitrarily-curved bending-active architectural structures.The developed framework consists of a series of methods that enable the production of a complex 3D structures composed of a set of flat 2D panels whose mechanical properties are locally tuned by varying the shape of embedded spiraling patterns. The resulting panels perform as variable stiffness elements, and they are optimized to match a desired target shape once assembled together. The presented framework includes all the steps for the physical delivery of architectural objects, including conception, static assessment, and digital fabrication. The developed framework has been applied to an architectural scale prototype, which demonstrates the potential of integrating architectural design, computational simulation, structural engineering, and digital fabrication, opening up several possible novel applications in the building sector. For more details on the prototype, please visit this webpage https://doi.org/10.1016/j.istruc.2021.08.004","tags":null,"title":"Integrated computational framework for the design and fabrication of bending-active structures made from flat sheet material","type":"publication"},{"authors":["Carlo Pavone","Alberto Abrate","Silvia Altomare","Marco Vella","Vincenzo Serretta","Alchiede Simonato","Marco Callieri"],"categories":null,"content":"","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"7019d6f1abf208d0b109046872029feb","permalink":"http://vcg.isti.cnr.it/publication/2021/PAAVSSC21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/PAAVSSC21/","section":"publication","summary":"","tags":null,"title":"Is Kelami`s Method Still Useful in the Smartphone Era? The Virtual 3-Dimensional Reconstruction of Penile Curvature in Patients With Peyronie`s Disease: A Pilot Study","type":"publication"},{"authors":["Roberto Scopigno"],"categories":null,"content":"","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"1fc91dc155dfcd036fc6e118f7eb0a31","permalink":"http://vcg.isti.cnr.it/publication/2021/Sco21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/Sco21/","section":"publication","summary":"","tags":null,"title":"Mixing Visual Media for Cultural Heritage","type":"publication"},{"authors":["Francesco Laccone","Alberto Casali","Marco Sodano","Maurizio Froli"],"categories":null,"content":" https://doi.org/10.1002/tal.1839\n","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"843e330020ff415eb2327531c511ecfd","permalink":"http://vcg.isti.cnr.it/publication/2021/LCSF21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/LCSF21/","section":"publication","summary":"Skyscrapers are among the most distinctive building types of the modern age. Since many resources are attributed to these buildings, their design should consider a proper performance-based construction economy and environmental sustainable development. This research introduces a new concept for a bundled tall building founded on the use of a multi-core-outrigger system, which is additionally enriched with diagrid structures. The concept is inspired by the bamboo plant and follows the biomimetic design principles for the structural organization and performance-based criteria for optimizing the lateral stiffness and for shaping the cross section. Particularly, the incident wind speed is maximized to exploit Vertical Axis Wind Turbines (VAWTs), which are located along the whole building height at the center of the bundled towers. The building morphogenesis is accomplished by a multistep methodology that is fully developed in a parametric environment and includes structural and computational fluid dynamic analyses. With the aim of validating the proposed concept, a case study of a 320-m-tall three-core building has been designed for the city of Pisa, Italy. The use of VAWTs results in an annual emissions reduction of about 10 kgCO_2/m^2. https://doi.org/10.1002/tal.1839","tags":null,"title":"Morphogenesis of a bundled tall building: Biomimetic, structural, and wind-energy design of a multi-core-outrigger system combined with diagrid","type":"publication"},{"authors":["Federico Landi","Marcella Cornia","Lorenzo Baraldi","Massimiliano Corsini","Rita Cucchiara"],"categories":null,"content":"","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"666757699d5185d123a2de2e387da1f1","permalink":"http://vcg.isti.cnr.it/publication/2021/LCBCC21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/LCBCC21/","section":"publication","summary":"","tags":null,"title":"Multimodal attention networks for low-level vision-and-language navigation","type":"publication"},{"authors":["Nico Pietroni","Stefano Nuvoli","Thomas Alderighi","Paolo Cignoni","Marco Tarini"],"categories":null,"content":" 10.1145/3450626.3459941\nwww.quadmesh.cloud\nDownload the slides! (.pttx)\n","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"a6773799208e6768ea19a06d4b02d217","permalink":"http://vcg.isti.cnr.it/publication/2021/PNACT21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/PNACT21/","section":"publication","summary":"We present a new algorithm for the semi-regular quadrangulation of an input surface, driven by its line features, such as sharp creases. We define a perfectly feature-aligned cross-field and a coarse layout of polygonal-shaped patches where we strictly ensure that all the feature-lines are represented as patch boundaries. To be able to consistently do so, we allow non-quadrilateral patches and T-junctions in the layout; the key is the ability to constrain the layout so that it still admits a globally consistent, T-junction-free, and pure-quad internal tessellation of its patches. This requires the insertion of additional irregular-vertices inside patches, but the regularity of the final-mesh is safeguarded by optimizing for both their number and for their reciprocal alignment. In total, our method guarantees the reproduction of feature-lines by construction, while still producing good quality, isometric, pure-quad, conforming meshes, making it an ideal candidate for CAD models. Moreover, the method is fully automatic, requiring no user intervention, and remarkably reliable, requiring little assumptions on the input mesh, as we demonstrate by batch processing the entire Thingi10K repository, with less than 0.5% of the attempted cases failing to produce a usable mesh.. DOI: 10.1145/3450626.3459941 Browsable dataset of Thingi10K remeshed objects: www.quadmesh.cloud Download the slides! (.pttx)","tags":null,"title":"Reliable feature-line driven quad-remeshing","type":"publication"},{"authors":["Paola Derudas","Nicolo Dell Unto","Marco Callieri","Jan Apel"],"categories":null,"content":" ","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"a63aaeaac00b3066e40cfbd139166875","permalink":"http://vcg.isti.cnr.it/publication/2021/DDCA21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/DDCA21/","section":"publication","summary":" ","tags":null,"title":"Sharing Archaeological Knowledge: The Interactive Reporting System","type":"publication"},{"authors":["Gaia Pavoni","Massimiliano Corsini","Federico Ponchio","Clinton Edwards","Nicole Pedersen","Stuart Sandin","Paolo Cignoni"],"categories":null,"content":"","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"b068acdd79e4ef44aa3afcc2de06da2c","permalink":"http://vcg.isti.cnr.it/publication/2021/PCPEPSC21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/PCPEPSC21/","section":"publication","summary":"","tags":null,"title":"TagLab: AI-assisted annotation for the fast and accurate semantic segmentation of coral reef orthoimages","type":"publication"},{"authors":["Andrea Maggiordomo","Paolo Cignoni","Marco Tarini"],"categories":null,"content":" https://doi.org/10.1111/cgf.142615\nhttps://github.com/maggio-a/texture-defrag\n","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"a6164c39e8b266d4ae49bc9a957315ac","permalink":"http://vcg.isti.cnr.it/publication/2021/MCT21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/MCT21/","section":"publication","summary":"We propose a method to improve an existing parametrization (UV-map layout) of a textured 3D model, targeted explicitly at alleviating typical defects afflicting models generated with automatic photo-reconstruction tools from real-world objects. This class of 3D data is becoming increasingly important thanks to the growing popularity of reliable, ready-to-use photogrammetry software packages. The resulting textured models are richly detailed, but their underlying parametrization typically falls short of many practical requirements, particularly exhibiting excessive fragmentation and consequent problems. Producing a completely new UV-map, with standard parametrization techniques, and then resampling a new texture image, is often neither practical nor desirable for at least two reasons: first, these models have characteristics (such as inconsistencies, high resolution) that make them unfit for automatic or manual parametrization; second, the required resampling leads to unnecessary signal degradation because this process is unaware of the original texel densities. In contrast, our method improves the existing UV-map instead of replacing it, balancing the reduction of the map fragmentation with signal degradation due to resampling, while also avoiding oversampling of the original signal. The proposed approach is fully automatic and extensively tested on a large benchmark of photo-reconstructed models; quantitative evaluation evidences a drastic and consistent improvement of the mappings. https://doi.org/10.1111/cgf.142615 Reference implementation available at https://github.com/maggio-a/texture-defrag","tags":null,"title":"Texture Defragmentation for Photo-Reconstructed 3D Models","type":"publication"},{"authors":["Roberto Scopigno","Federico Ponchio","Matteo Dellepiane","Marco Callieri","Francesco Banterle","Marco Potenziani"],"categories":null,"content":"","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"84cdd7b9319669362fad10d88e8663ce","permalink":"http://vcg.isti.cnr.it/publication/2021/PBCDPS21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/PBCDPS21/","section":"publication","summary":"","tags":null,"title":"Virtual clones for cultural heritage applications","type":"publication"},{"authors":["Thomas Alderighi","Luigi Malomo","Bernd Bickel","Paolo Cignoni","Nico Pietroni"],"categories":null,"content":" Presentation slides (.pptx)\n","date":1609459200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1609459200,"objectID":"c5fa0948345cb89a5442b921ca0ef184","permalink":"http://vcg.isti.cnr.it/publication/2021/AMBCP21/","publishdate":"2021-01-01T00:00:00Z","relpermalink":"/publication/2021/AMBCP21/","section":"publication","summary":"We introduce a novel technique to automatically decompose an input object's volume into a set of parts that can be represented by two opposite height fields. Such decomposition enables the manufacturing of individual parts using two-piece reusable rigid molds. Our decomposition strategy relies on a new energy formulation that utilizes a pre-computed signal on the mesh volume representing the accessibility for a predefined set of extraction directions. Thanks to this novel formulation, our method allows for efficient optimization of a fabrication-aware partitioning of volumes in a completely automatic way. We demonstrate the efficacy of our approach by generating valid volume partitionings for a wide range of complex objects and physically reproducing several of them. Presentation slides (.pptx)","tags":null,"title":"Volume decomposition for two-piece rigid casting","type":"publication"},{"authors":null,"categories":null,"content":"The paper ‘Another Brick in the Wall: Improving the Assisted Semantic Segmentation of Masonry Walls’ by Gaia Pavoni, Francesca Giuliani, Anna De Falco, Massimiliano Corsini, Federico Ponchio, Marco Callieri, and Paolo Cignoni presented at the XVIII Eurographics Workshop on Graphics and Cultural Heritage (EG-GCH2020) has received the best paper award at the conference.\n","date":1605744e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1605744e3,"objectID":"a4c0ae4e156eba35f095dbb48f0fea42","permalink":"http://vcg.isti.cnr.it/post/20-11-19-best-paper-gch/","publishdate":"2020-11-19T00:00:00Z","relpermalink":"/post/20-11-19-best-paper-gch/","section":"post","summary":"The paper ‘Another Brick in the Wall: Improving the Assisted Semantic Segmentation of Masonry Walls’ by Gaia Pavoni, Francesca Giuliani, Anna De Falco, Massimiliano Corsini, Federico Ponchio, Marco Callieri, and Paolo Cignoni presented at the XVIII Eurographics Workshop on Graphics and Cultural Heritage (EG-GCH2020) has received the best paper award at the conference.","tags":null,"title":"Best paper at GCH2020","type":"post"},{"authors":null,"categories":null,"content":"An Interactive Digital System was developed by Gianpaolo Palma and Eliana Siotto of the Visual Computing Lab of ISTI-CNR to explore the frescoed ceiling of the Loggia of Cupid and Psyche at the time of the COVID-19. The system was created in collaboration with the Accademia Nazionale dei Lincei within the celebrations for the fifth centenary of Raphael’s death, and it is mentioned among the “136 reopening projects in Italy and worldwide”.\nThe system has encountered a great media promotion in the leading specialized magazines, national and local media, social network and web (TG3 (17’:35’), Rai Cultura, Arte Sky, Finestre sull’Arte, Arte Magazine, Corriere della Sera, Repubblica Roma, La Nazione di Pisa, Webinar – The Cyprus Institute, Webinar – Italian Cultural Institutes of the United States and Canada, etc.) with interesting effects on the cultural enjoyment.\nThe dedicated interactive system provides practical support at the exhibition ‘Raphael in Villa Farnesina: Galatea and Psyche’, opened today (October 6, 2020 – January 6, 2021).\n","date":1601942400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1601942400,"objectID":"9d856593271cdc0e32d1b66228c5840b","permalink":"http://vcg.isti.cnr.it/post/20-10-06-digital-loggia/","publishdate":"2020-10-06T00:00:00Z","relpermalink":"/post/20-10-06-digital-loggia/","section":"post","summary":"An Interactive Digital System was developed by Gianpaolo Palma and Eliana Siotto of the Visual Computing Lab of ISTI-CNR to explore the frescoed ceiling of the Loggia of Cupid and Psyche at the time of the COVID-19.","tags":null,"title":"A 'digital Loggia' for Raphael and his workshop in Villa Farnesina, Rome","type":"post"},{"authors":["Francesco Laccone","Luigi Malomo","Jesús Pérez","Nico Pietroni","Federico Ponchio","Bernd Bickel","Paolo Cignoni"],"categories":null,"content":"","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"33397c37cd4171cd36bcb44c82ef6fea","permalink":"http://vcg.isti.cnr.it/publication/2020/LMPPPBC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/LMPPPBC20/","section":"publication","summary":"Bending-active structures are able to efficiently produce complex curved shapes from flat panels. The desired deformation of the panels derives from the proper selection of their elastic properties. Optimized panels, called FlexMaps, are designed such that, once they are bent and assembled, the resulting static equilibrium configuration matches a desired input 3D shape. The FlexMaps elastic properties are controlled by locally varying spiraling geometric mesostructures, which are optimized in size and shape to match specific bending requests, namely the global curvature of the target shape. The design pipeline starts from a quad mesh representing the input 3D shape, which defines the edge size and the total amount of spirals: every quad will embed one spiral. Then, an optimization algorithm tunes the geometry of the spirals by using a simplified pre-computed rod model. This rod model is derived from a non-linear regression algorithm which approximates the non-linear behavior of solid FEM spiral models subject to hundreds of load combinations. This innovative pipeline has been applied to the project of a lightweight plywood pavilion named FlexMaps Pavilion, which is a single-layer piecewise twisted arch that fits a bounding box of 3.90x3.96x3.25 meters. This case study serves to test the applicability of this methodology at the architectural scale. The structure is validated via FE analyses and the fabrication of the full scale prototype. For more details on the prototype, please visit this webpage Our pavilion has been exhibited in the Italian pavilion of the 2021 17th Biennale Architettura in Venice","tags":null,"title":"A bending\u0026#8209;active twisted\u0026#8209;arch plywood structure: computational design and fabrication of the FlexMaps Pavilion","type":"publication"},{"authors":["Gianpaolo Palma","Eliana Siotto"],"categories":null,"content":"","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"a1be2653100e665917c5b0a6e3335038","permalink":"http://vcg.isti.cnr.it/publication/2020/PS20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/PS20/","section":"publication","summary":"","tags":null,"title":"A digital Loggia at the time of COVID-19","type":"publication"},{"authors":["Paolo Cignoni","Massimiliano Corsini","Gaia Pavoni"],"categories":null,"content":" ","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"5ec434387ffa4bd66bc1037909447a57","permalink":"http://vcg.isti.cnr.it/publication/2020/PCC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/PCC20/","section":"publication","summary":" ","tags":null,"title":"A State of the Art Technology in Large Scale Underwater Monitoring","type":"publication"},{"authors":["Gaia Pavoni","Francesca Giuliani","Anna De Falco","Massimiliano Corsini","Federico Ponchio","Marco Callieri","Paolo Cignoni"],"categories":null,"content":" ","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"86630d466a8642713756f7926804eb5c","permalink":"http://vcg.isti.cnr.it/publication/2020/PGDCPCC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/PGDCPCC20/","section":"publication","summary":"In Architectural Heritage, the masonry's interpretation is an essential instrument for analyzing the construction phases, the assessment of structural properties, and the monitoring of its state of conservation. This work is generally carried out by specialists that, based on visual observation and their knowledge, manually annotate ortho-images of the masonry generated by photogrammetric surveys. This results in vectorial thematic maps segmented according to their construction technique (isolating areas of homogeneous materials/structure/texture) or state of conservation, including degradation areas and damaged parts. This time-consuming manual work, often done with tools that have not been designed for this purpose, represents a bottleneck in the documentation and management workflow and is a severely limiting factor in monitoring large-scale monuments (e.g.city walls). This paper explores the potential of AI-based solutions to improve the efficiency of masonry annotation in Architectural Heritage. This experimentation aims at providing interactive tools that support and empower the current workflow, benefiting from specialists' expertise.","tags":null,"title":"Another Brick in the Wall: Improving the Assisted Semantic Segmentation of Masonry Walls","type":"publication"},{"authors":["Francesco Laccone","Luigi Malomo","Nico Pietroni","Maurizio Froli","Paolo Cignoni"],"categories":null,"content":"","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"c5dd82024a12f957389fca64ae16e218","permalink":"http://vcg.isti.cnr.it/publication/2020/LMPFC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/LMPFC20/","section":"publication","summary":"Shells made of structural glass are beautiful objects from both the aesthetics and the engineering point of view. However, they pose two significant challenges. The first one is to assure adequate safety and redundancy concerning possible global collapse. Being single-layered, in a shell made of structural glass, the brittle cracking of a single pane can lead to a sudden propagation of failure, up to instability. The second one is to guarantee cheap replacing possibilities for potentially collapsed components. This research explores a novel concept to address both requirements, where glass is both post-tensioned and reinforced and develops the research on TVT post-tensioned glass beams. Following the Fail- Safe Design (FSD) principles, a steel reinforcement relieves glass deficiencies (i.e. brittleness and low tensile strength). Following the Damage Avoidance Design (DAD) principles, glass segmentation and post-tensioning avoid the propagation of cracks. Up to now, glass-steel systems were limited to mono-dimensional elements (such as beams and columns) or simple bi-dimensional elements (arches, domes, barrel vaults). Instead, massive structures are usually realized as grid shells, where glass is used as simple cladding. This research investigates piecewise triangulated glass shells to enable the creation of 3D free-form glass-steel systems, where glass is load-bearing material. Hence, laminated glass panels are mechanically coupled with a filigree steel truss, whose elements are placed at the edges of the panel and act as an unbonded reinforcement. In a performance-based perspective, these steel trusses can be sized to bear at least the weight of all panels in the occurrence of simultaneous cracks (worst-case scenario). The panels are post-tensioned using a set of edge-aligned cables that add beneficial compressive stress on glass to prevent crack initiation. The cable placement and accompanying pre-loads are derived with an optimization strategy that minimizes the tensile stress acting on the shell. This optimization procedure also considers the practical constraints involved in the process. The results obtained through this automated procedure are later investigated using nonlinear FE analyses. The resulting structures optimize the total material usage providing contemporarily both transparency and load-bearing capabilities. Posttensioned shells excel in static performances, achieving high stiffness and good redundancy for the worst-case scenario, and improve the structural lightness and the visual impact with respect to state-of-the-art competitors.","tags":null,"title":"Automated Design and Analysis of Reinforced and Post-Tensioned Glass Shells","type":"publication"},{"authors":["Giovanni Pintore","Claudio Mura","Fabio Ganovelli","Lizeth Fuentes-Perez","Renato Pajarola","Enrico Gobbetti"],"categories":null,"content":"","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"8296cea4017c830fff49f3ca4c4cc9b7","permalink":"http://vcg.isti.cnr.it/publication/2020/PMGFPG20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/PMGFPG20/","section":"publication","summary":"","tags":null,"title":"Automatic 3D Reconstruction of Structured Indoor Environments","type":"publication"},{"authors":["Maurizio Froli","Francesco Laccone"],"categories":null,"content":" ","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"b25b7b3d0087db72f474d182e70aa942","permalink":"http://vcg.isti.cnr.it/publication/2020/FL20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/FL20/","section":"publication","summary":"The paper introduces a novel concept for structural glass shells that is based on the mechanical coupling of double curved heat-bent glass panels and a wire frame mesh, which constitutes a grid of unbonded edge-reinforcement. Additionally, this grid has the purpose of providing redundancy. The panels have load-bearing function, they are clamped at the vertices and dry-assembled. The main novelty lies in the use of polygonal curved panelswith a nodal force transfer mechanism. This concept has been validated on an illustrative design case of a 6 m-diameter suspended glass sphere, in which regular pentagonal and hexagonal spherical panels are employed. The good strength and stiffness achieved for this structure is demonstrated by means of local and global FE models. Another fundamental feature of the concept is that the reinforcement grid provides residual strength in the extreme scenarios in which all panels are completely failed. A quantitative measure of redundancy is obtained by comparing this scenario with the ULS.","tags":null,"title":"Conceptual design and FEM structural response of a suspended glass sphere made of reinforced curved polygonal panels","type":"publication"},{"authors":["Jinfan Yang","Chrystiano Araujo","Nicholas Vining","Zachary Ferguson","Enrique Rosales","Daniele Panozzo","Silvain Lefebvre","Paolo Cignoni","Alla Sheffer"],"categories":null,"content":" ","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"ee0d358e1f08a445e59a65da2c90cd6c","permalink":"http://vcg.isti.cnr.it/publication/2020/YAVFRPLCS20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/YAVFRPLCS20/","section":"publication","summary":" ","tags":null,"title":"DHFSlicer: double height-field slicing for milling fixed-height materials","type":"publication"},{"authors":["Francesco Laccone","Christian Louter","Maurizio Froli"],"categories":null,"content":"","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"af96f0e386fbc2a805d9c90d32950b3a","permalink":"http://vcg.isti.cnr.it/publication/2020/LLF20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/LLF20/","section":"publication","summary":"Glass exhibits brittle failure behavior. Therefore, redundancy is a fundamental design requirement when using glass as a main structural material. On this basis, a novel structural concept has been developed for hybrid glass-steel posttensioned triangulated structures, where the two materials collaborate. In forming such lattice structure, local fracture must be avoided. This paper presents a parametric study that highlights the influences of mechanical and geometrical parameters on the in-plane and out-of-plane static behaviour of laminated triangular glass panels. The resulting data set constitutes a useful source for the designer to select the most appropriate component. The main sensitivity parameters are panel length, laminate thickness, and interlayer stiffness.","tags":null,"title":"Glass-Steel Triangulated Structures: Parametric Nonlinear Finite-Element Analysis of In-Plane and Out-of-Plane Structural Response of Triangular Laminated Glass Panels","type":"publication"},{"authors":["Marco Livesu","Nico Pietroni","Enrico Puppo","Alla Sheffer","Paolo Cignoni"],"categories":null,"content":" GitHub Code\n","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"afabf87eabc3b64e31e9e0cd54a7e372","permalink":"http://vcg.isti.cnr.it/publication/2020/LPPSC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/LPPSC20/","section":"publication","summary":"We present a new fully automatic block-decomposition algorithm for feature-preserving, strongly hex-dominant meshing, that yields results with a drastically larger percentage of hex elements than prior art. Our method is guided by a surface field that conforms to both surface curvature and feature lines, and exploits an ordered set of cutting loops that evenly cover the input surface, defining an arrangement of loops suitable for hex-element generation. We decompose the solid into coarse blocks by iteratively cutting it with surfaces bounded by these loops. The vast majority of the obtained blocks can be turned into hexahedral cells via simple midpoint subdivision. GitHub Code","tags":null,"title":"LoopyCuts: Practical Feature-Preserving Block Decomposition","type":"publication"},{"authors":["Fabio Pellacini","Federico Ponchio","Filippo A. Fanni","Tinsae Gebrechristos Dulecha","Andrea Giachetti"],"categories":null,"content":"","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"6bfd8171eb7e684b9a3c1efecd8a43a3","permalink":"http://vcg.isti.cnr.it/publication/2020/GFPPG20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/GFPPG20/","section":"publication","summary":"","tags":null,"title":"Neural Reflectance Transformation Imaging","type":"publication"},{"authors":["Francesco Banterle","Alessandro Artusi","Alejandro Moreo","Fabio Carrara"],"categories":null,"content":"","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"5ec26ee6ef8f5d1c5a13133c5516507a","permalink":"http://vcg.isti.cnr.it/publication/2020/BAMC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/BAMC20/","section":"publication","summary":"","tags":null,"title":"NoR-VDPNet: A No-Reference High Dynamic Range Quality Metric Trained on HDR-VDP 2","type":"publication"},{"authors":["Gaia Pavoni","Massimiliano Corsini","Marco Callieri","Clinton Edwards","Paolo Cignoni"],"categories":null,"content":"","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"32ded4e12293dbd83658f66e457e6f01","permalink":"http://vcg.isti.cnr.it/publication/2020/PCCEC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/PCCEC20/","section":"publication","summary":"","tags":null,"title":"On Improving the Training of Models for the Semantic Segmentation of Benthic Communities from Orthographic Imagery","type":"publication"},{"authors":["Irene Filoscia","Thomas Alderighi","Daniela Giorgi","Luigi Malomo","Marco Callieri","Paolo Cignoni"],"categories":null,"content":" ","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"4e3d2008bb715323ad404b986ccafaf7","permalink":"http://vcg.isti.cnr.it/publication/2020/FAGMCC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/FAGMCC20/","section":"publication","summary":"We propose a method for the automatic segmentation of 3D objects into parts which can be individually 3D printed and then reassembled by preserving the visual quality of the final object. Our technique focuses on minimizing the surface affected by supports, decomposing the object into multiple parts whose printing orientation is automatically chosen. The segmentation reduces the visual impact on the fabricated model producing non-planar cuts that adapt to the object shape. This is performed by solving an optimization problem that balances the effects of supports and cuts, while trying to place both in occluded regions of the object surface. To assess the practical impact of the solution, we show a number of segmented, 3D printed and reassembled objects. https://diglib.eg.org/handle/10.1111/cgf13941","tags":null,"title":"Optimizing Object Decomposition to Reduce Visual Artifacts in 3D Printing","type":"publication"},{"authors":["Andrea Maggiordomo","Federico Ponchio","Paolo Cignoni","Marco Tarini"],"categories":null,"content":" Real-World Textured Things (RWTT)\nRWTT\nhttps://texturedmesh.isti.cnr.it/\nhttps://doi.org/10.1016/j.cagd.2020.101943/\n","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"5bd5605b4cad85a4892e04cd057d6aa0","permalink":"http://vcg.isti.cnr.it/publication/2020/MPCT20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/MPCT20/","section":"publication","summary":"We are witnessing a proliferation of textured 3D models captured from the real world with automatic photo-reconstruction tools by people and professionals without a proper technical background in computer graphics. Digital 3D models of this class come with a unique set of characteristics and defects - especially concerning their parametrization - setting them starkly apart from 3D models originating from other, more traditional, sources. We study this class of 3D models by collecting a significant number of representatives and quantitatively evaluating their quality according to several metrics. These include a new invariant metric we carefully design to assess the amount of fragmentation of the UV map, which is one of the main weaknesses potentially hindering the usability of these models. Our results back the widely shared notion that models of this new class are still not fit for direct use in downstream applications (such as videogames), and require challenging processing steps. Regrettably, existing automatic geometry processing tools are not always up to the task: for example, we verify that the available tools for UV optimization often fail due to mesh inconsistencies, geometric and topological noise, excessive resolution, or other factors; moreover, even when an output is produced, it rarely represents a significant improvement over the input (according to the aforementioned measures). Therefore, we argue that further advancements are required by the computer graphics and geometry processing communities specifically targeted at this class of models. Towards this goal, we share the models we collected in this study as a new public repository, Real-World Textured Things (RWTT), intended as a benchmark to systematic field-test and compare future algorithms. RWTT consists of 568 carefully selected textured 3D models representative of the most popular photo-reconstruction tools currently available. We also provide a web interface to browse the dataset by the metadata we collected during our experiments and a tool, TexMetro, to compute the same set of measures on generic UV mapped datasets. The Real-World Textured Things (RWTT) Dataset is available at https://texturedmesh.isti.cnr.it/ https://doi.org/10.1016/j.cagd.2020.101943/","tags":null,"title":"Real-World Textured Things: a Repository of Textured Models Generated with Modern Photo-Reconstruction Tools","type":"publication"},{"authors":["Francisca Gil-Ureta","Nico Pietroni","Denis Zorin"],"categories":null,"content":" ","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"376c56028559d75cc84c818c1af1b72f","permalink":"http://vcg.isti.cnr.it/publication/2020/GPZ20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/GPZ20/","section":"publication","summary":"We introduce an efficient method for designing shell reinforcements of minimal weight. Inspired by classical Michell trusses, we create a reinforcement layout whose members are aligned with optimal stress directions, then optimize their shape minimizing the volume while keeping stresses bounded. We exploit two predominant techniques for reinforcing shells: adding ribs aligned with stress directions and using thicker walls on regions of high stress. Most previous work can generate either only ribs or only variablethickness walls. However, in the general case, neither approach by itself will provide optimal solutions. By using a more precise volume model, our method is capable of producing optimized structures with the full range of qualitative behaviors: from ribs to walls, and smoothly transitioning in between. Our method includes new algorithms for determining the layout of reinforcement structure elements, and an efficient algorithm to optimize their shape, minimizing a non-linear non-convex functional at a fraction of the cost and with better optimality compared to standard solvers. We demonstrate the optimization results for a variety of shapes, and the improvements it yields in the strength of 3D-printed objects.","tags":null,"title":"Reinforcement of General Shell Structures","type":"publication"},{"authors":["Mario Salinas","Daniela Giorgi","Federico Ponchio","Paolo Cignoni"],"categories":null,"content":" Reviewernet.org\n","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"6122e57a8b070e1d0405f5e41a051267","permalink":"http://vcg.isti.cnr.it/publication/2020/SGPC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/SGPC20/","section":"publication","summary":"We propose ReviewerNet, an online, interactive visualization system aimed to improve the reviewer selection process in the academic domain. Given a paper submitted for publication, we assume that good candidate reviewers can be chosen among the authors of a small set of pertinent papers; ReviewerNet supports the construction of such set of papers, by visualizing and exploring a literature citation network. The system helps journal editors and Program Committee members to select reviewers that do not have any conflict-of-interest and are representative of different research groups, by visualising the careers and co-authorship relations of candidate reviewers. The system is publicly available, and is demonstrated in the field of Computer Graphics. The system is online at Reviewernet.org","tags":null,"title":"ReviewerNet: A visualization platform for the selection of academic reviewers","type":"publication"},{"authors":["Giovanni Pintore","Claudio Mura","Fabio Ganovelli","Lizeth Fuentes-Perez","Renato Pajarola","Enrico Gobbetti"],"categories":null,"content":" ","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"fc3cc57fbe663f05cc990f763798ff3b","permalink":"http://vcg.isti.cnr.it/publication/2020/PMGFPG20a/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/PMGFPG20a/","section":"publication","summary":" ","tags":null,"title":"State-of-the-Art in Automatic 3D Reconstruction of Structured Indoor Environments","type":"publication"},{"authors":["Daniela Giorgi","Marco Del Francia","Massimo Ferri","Paolo Cignoni"],"categories":null,"content":" Bridges 2020 presentation (.pptx)\n","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"ceeaea04fe4a7151998d319f9571e6f1","permalink":"http://vcg.isti.cnr.it/publication/2020/GDFC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/GDFC20/","section":"publication","summary":"The 19th century saw the development of a new branch of mathematics, topology, which studies the properties of geometrical objects that are invariant under continuous transformations. In the subsequent decades, topology would have a great influence on the way in which artists and architects sensed and represented space. Among them, the Italian architect Vittorio Giorgini (1926 - 2010) pioneered the topology-flavoured ideas of elastic surfaces and of form as a dynamic structure. Beside his architectural works, Giorgini left a few enchanting sculptures, in which he explored the connection between shape and topology. In this paper, we first present Giorgini's beautiful architectural designs, which were largely unrecognized in his lifetime, and they have only recently started to receive the attention they deserved. Then, we explain the topological ideas behind six of his sculptures, in a formal mathematical language. Surprisingly enough for non-mathematicians, four of his most famous sculptures - Modified Klein, Giorgini Sphere, Giorgini Torus I, and Giorgini Torus III - turn out to be topologically equivalent. This means that they can be continuously deformed into one another, even though their geometric appearances are very different from each other. We first illustrate by drawing the steps in the deformation process. Then, we provide a formal proof of the equivalence using basic notions from algebraic topology: non-orientable genus, Euler characteristic, and the classification theorem for surfaces. Giorgini designed his three-dimensional figures in-between the late 1960's and the first half of the 2000's. The figures only existed as bi-dimensional drawings for many years. Then, Giorgini asked David Dainelli and Alessandro Marzetti to carve alabaster sculptures from his drawings, in their artistic workshop in Volterra (Pisa, Italy), under his direct supervision. Giorgini's sculptures represent non-orientable surfaces. Intuitively, non-orientable surfaces are one-sided: one could paint in colour the whole surface without crossing its boundary and without detaching the brush. That would not be possible for orientable surfaces such as the familiar cylinder and sphere, which are two-sided. The first sculpture we present is Modified Klein, a Klein bottle with a disk removed. The Klein bottle is a well-known and fascinating example of a non-orientable surface, which not only is one-sided, but also closed (it has no boundaries) while it does not enclose an interior. As it often happens with physical reproductions of the Klein bottle, Giorgini cut a disk around the surface self-intersection. The other three sculptures named Giorgini Sphere, Giorgini Torus I, and Giorgini Torus III are constructed through variations on the same procedure: start from a sphere (a torus), cut away portions of the surface to make a cylinder, then connect the top and bottom boundaries of the cylinder with a strip without twisting, to get a non-orientable surface. What would sound surprising to a non-topologist is that, beside being neither spheres nor toruses, the three sculptures are topologically equivalent to Modified Klein. All four sculptures are non-orientable surfaces with one boundary, and after some calculations one can verify they all have non-orientable genus equal to 2: being the non-orientable genus a topological invariant, the four sculptures share the same topological type. In our paper, for illustration purposes, we draw eight steps in the deformation process which takes Modified Klein to Giorgini Torus I. Finally, we report on the topological type of two other sculptures: Giorgini Torus II, a non-orientable surface with three boundaries which has the topology of a Moebius strip minus two disks, and Giorgini Torus IV, a non-orientable surface with two boundaries which has the topology of a sphere with five holes, three of which are capped by Moebius strips.\nBridges 2020 presentation (.pptx)\nDeforming Modified Kein into Giorgini Torus I (.mp4)\n\n\n\nVittorio Giorgini: Architetture d'Alabastro, by Duccio Benvenuti","tags":null,"title":"Topological Classification of Vittorio Giorgini’s Sculptures","type":"publication"},{"authors":["Rachele Manganelli del Fà","Giovanni Pancani","Giovanni Minutoli","Andrea Arrighetti","Gabriella Poggesi","Marco Callieri"],"categories":null,"content":" ","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"cfee99e0d8a1b27f1e0cd15cf300f687","permalink":"http://vcg.isti.cnr.it/publication/2020/PAMPMC20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/PAMPMC20/","section":"publication","summary":" ","tags":null,"title":"Tumulo etrusco della Montagnola: un viaggio virtuale","type":"publication"},{"authors":["Nicola Capece","Francesco Banterle","Paolo Cignoni","Fabio Ganovelli","Ugo Erra"],"categories":null,"content":"","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"79661e84a1fb12dc90ffed796d504a77","permalink":"http://vcg.isti.cnr.it/publication/2020/CBCGE20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/CBCGE20/","section":"publication","summary":"","tags":null,"title":"Turning a Smartphone Selfie Into a Studio Portrait ","type":"publication"},{"authors":["Maurizio Froli","Francesco Laccone","Agnese Natali"],"categories":null,"content":"","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"b6071e201fdda833229cb473a9e33b69","permalink":"http://vcg.isti.cnr.it/publication/2020/FLN20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/FLN20/","section":"publication","summary":"Transparency and structural lightness are inspiring ideas in the design of footbridges. Glass is the most performing transparent material to be used for structural purposes because of its high compressive strength, chemical stability, and absence of fatigue and viscosity phenomena at room temperature. However, its fragility constitutes a challenging limit in structural applications. This research provides and discusses a specific concept named TVTδ (Travi Vitree Tensegrity) for lightweight long-span beam-like footbridges made of structural glass. Hence, two design approaches of fail-safe design (FSD) and damage avoidance design (DAD) are applied to guarantee adequate safety levels and postcracking serviceability, respectively, with low damages on the main components. FSD provides the adoption of structural collaboration between glass and steel. Following DAD, glass is segmented into triangular panels, and reciprocal diffuse prestress is performed by steel tendons. This strategy assures low rehabilitation costs because only collapsed elements should be replaced once failed. At ultimate limit state (ULS), the TVTδ footbridge attains a global ductile behavior in which the yielding of steel tendons occurs before any fragile failure. Such result is achieved through a hierarchic calibration of the chain of failures. In glass panels, which are mostly precompressed, the buckling failure, representing the main risk, is delayed by the mutual stabilization of the panels' compressed edges with steel clamping. However, because an accidental event may cause a localized or diffuse brittle failure of glass components, the system is designed to maintain a residual load bearing capacity in this scenario. At the serviceability limit state (SLS), the TVTδ footbridge is highly stiffened by the presence of glass panes, partially encased in metallic frames. Crack initiation is delayed by precompression.","tags":null,"title":"TVTδ Concept for Long-Span Glass–Steel Footbridges","type":"publication"},{"authors":["Mattia Angelini","Vito Ferrulli","Francesco Banterle","Massimiliano Corsini","Maria Antonietta Pascali","Paolo Cignoni","Daniela Giorgi"],"categories":null,"content":" ","date":1577836800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1577836800,"objectID":"5add4c7e95033cdd1ec00b9a4dac48d8","permalink":"http://vcg.isti.cnr.it/publication/2020/AFBCPCG20/","publishdate":"2020-01-01T00:00:00Z","relpermalink":"/publication/2020/AFBCPCG20/","section":"publication","summary":"We present the ongoing effort to build the first benchmark dataset for aestethic prediction on 3D models. The dataset is built on top of Sketchfab, a popular platform for 3D content sharing. In our dataset, the visual 3D content is aligned with aesthetics-related metadata: each 3D model is associated with a number of snapshots taken from different camera positions, the number of times the model has been viewed in-between its upload and its retrieval, the number of likes the model got, and the tags and comments received from users. The metadata provide precious supervisory information for data-driven research on 3D visual attractiveness and preference prediction. The paper contribution is twofold. First, we introduce an interactive platform for visualizing data about Sketchfab. We report a detailed qualitative and quantitative analysis of numerical scores (views and likes collected by 3D models) and textual information (tags and comments) for different 3D object categories. The analysis of the content of Sketchfab provided us the base for selecting a reasoned subset of annotated models. The second contribution is the first version of the ViDA 3D dataset, which contains the full set of content required for data-driven approaches to 3D aesthetic analysis. While similar datasets are available for images, to our knowledge this is the first attempt to create a benchmark for aestethic prediction for 3D models. We believe our dataset can be a great resource to boost research on this hot and far-from-solved problem.","tags":null,"title":"ViDA 3D: Towards a View-based Dataset for Aesthetic prediction on 3D models","type":"publication"},{"authors":["Alessandro Vecchione","Aurelia Lureau","Marco Callieri"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"136b947d50142184d8ea60ce457e9024","permalink":"http://vcg.isti.cnr.it/publication/2019/VLC19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/VLC19/","section":"publication","summary":"","tags":null,"title":"3D archaeological data management via web: The experience with 3DHOP software","type":"publication"},{"authors":["Anthony Pamart","Violette Abergel1","Federico Ponchio","Massimiliano Corsini","Matteo Dellepiane","Roberto Scopigno","Livio de Luca"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"d6a4ab862dcb7037b3d7c39012e8c459","permalink":"http://vcg.isti.cnr.it/publication/2019/PAPCDSD19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/PAPCDSD19/","section":"publication","summary":"","tags":null,"title":"A complete framework toward Spatially-Oriented RTI for CH documentation and analysis","type":"publication"},{"authors":["Maurizio Froli","Linda Giresini","Francesco Laccone"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"90ba280ca5ef63a753cb0306e3122bfa","permalink":"http://vcg.isti.cnr.it/publication/2019/FGL19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/FGL19/","section":"publication","summary":"A novel isolation device is introduced to seismically protect slender structures or historic assets within the philosophy of Damage Avoidance Design (DAD). This device is conceived to allow smooth, controlled and damped rocking thanks to spherical contact surfaces, elastic springs which ensure re-centering, frictional layers and viscous elastic dampers able to dissipate energy during motion. The conceptual framework of the device is analyzed, and corresponding equations of motions obtained for the equivalent two degrees-of-freedom system. The proposed Performance Based Approach allows identifying geometric and mechanical features of the system. Extensive dynamic analyses with spectra-compatible ground motions are performed and the primary contribution of friction, developed by the relative slip of the two spherical surfaces, is discussed. Finally, the dynamic response under selected earthquakes is evaluated by comparing the isolated and the corresponding not isolated response, to highlight the beneficial effects produced by the proposed isolation technique.","tags":null,"title":"A new seismic isolation device based on tribological smooth rocking (TROCKSISD)","type":"publication"},{"authors":["Roberto Scopigno","Marco Palma","Massimiliano Corsini","Gaia Pavoni"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"5e32a9545fc06538dd6af86e88d5ee06","permalink":"http://vcg.isti.cnr.it/publication/2019/PCPS19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/PCPS19/","section":"publication","summary":"The automatic recognition of natural structures is a challenging task in the supervised learning field. Complex morphologies are difficult to detect both from the networks, that may suffer from generalization issues, and from human operators, affecting the consistency of training datasets. The task of manual annotating biological structures is not comparable to a generic task of detecting an object (a car, a cat, or a flower) within an image. Biological structures are more similar to textures, and specimen borders exhibit intricate shapes. In this specific context, manual labelling is very sensitive to human error. The interactive validation of the predictions is a valuable resource to improve the network performance and address the inaccuracy caused by the lack of annotation consistency of human operators reported in literature. The proposed tool, inspired by the Yes/No Answer paradigm, integrates the semantic segmentation results coming from a CNN with the previous human labeling, allowing a more accurate annotation of thousands of instances in a short time. At the end of the validation, it is possible to obtain corrected statistics or export the integrated dataset and re-train the network.","tags":null,"title":"A Validation Tool For Improving Semantic Segmentation of Complex Natural Structures","type":"publication"},{"authors":["Mario Salinas","Daniela Giorgi","Federico Ponchio","Paolo Cignoni"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"9f4923ecef4a70d4f2a9a8a8c67ce270","permalink":"http://vcg.isti.cnr.it/publication/2019/SGPC19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/SGPC19/","section":"publication","summary":"We propose ReviewerNet, an online, interactive visualization system aimed to improve the reviewer selection process in the academic domain. Given a paper submitted for publication, we assume that good candidate reviewers can be chosen among the authors of a small set of pertinent papers; ReviewerNet supports the construction of such set of papers, by visualizing and exploring a literature citation network. Then, the system helps to select reviewers that are both well distributed in the scientific community and that do not have any conflict-of-interest, by visualising the careers and co-authorship relations of candidate reviewers. The system is publicly available, and is demonstrated in the field of Computer Graphics.","tags":null,"title":"A visualization tool for scholarly data","type":"publication"},{"authors":["Roberto Scopigno","Eliana Siotto","Gianpaolo Palma"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"9fbcb41fdea109501868b41841911c4e","permalink":"http://vcg.isti.cnr.it/publication/2019/PSS19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/PSS19/","section":"publication","summary":"","tags":null,"title":"Analisi dei frammenti di sectilia vitrei dalla villa romana di Aiano-Torraccia di Chiusi (SI) e studio della tecnica di esecuzione","type":"publication"},{"authors":["Francesco Laccone","Luigi Malomo","Maurizio Froli","Paolo Cignoni","Nico Pietroni"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"661fea473441ac71722234e353f9919d","permalink":"http://vcg.isti.cnr.it/publication/2019/LMFCP19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/LMFCP19/","section":"publication","summary":"We propose an optimization algorithm for the design of post-tensioned architectural shell structures, composed of triangular glass panels, in which glass has a load-bearing function. Due to its brittle nature, glass can fail when it is subject to tensile forces. Hence, we enrich the structure with a cable net, which is specifically designed to post-tension the shell, relieving the underlying glass structure from tension. We automatically derive an optimized cable layout, together with the appropriate pre-load of each cable. The method is driven by a physically-based static analysis of the shell subject to its service load. We assess our approach by applying non-linear FEM analysis to several real scale application scenarios. Such a method of cable tensioning produces glass shells that are optimized from the material usage viewpoint since they exploit the high compression strength of glass. As a result, they are lightweight and robust. Both aesthetic and static qualities are improved with respect to grid shell competitors. DOI: 10.1111/cgf.13801","tags":null,"title":"Automatic Design of Cable-Tensioned Glass Shells","type":"publication"},{"authors":["Giovanni Pintore","Fabio Ganovelli","Alberto Jaspe Villanueva","Enrico Gobbetti"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"40c06b6b99981d308873c3e2c9197932","permalink":"http://vcg.isti.cnr.it/publication/2019/PGJG19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/PGJG19/","section":"publication","summary":"We present a novel and light-weight approach to capture and reconstruct structured 3D models of multi-room floor plans. Starting from a small set of registered panoramic images, we automatically generate a 3D layout of the rooms and of all the main objects inside. Such a 3D layout is directly suitable for use in a number of real-world applications, such as guidance, location, routing, or content creation for security and energy management. Our novel pipeline introduces several contributions to indoor reconstruction from purely visual data. In particular, we automatically partition panoramic images in a connectivity graph, according to the visual layout of the rooms, and exploit this graph to support object recovery and rooms boundaries extraction. Moreover, we introduce a plane-sweeping approach to jointly reason about the content of multiple images and solve the problem of object inference in a top-down 2D domain. Finally, we combine these methods in a fully automated pipeline for creating a structured 3D model of a multi-room floor plan and of the location and extent of clutter objects. These contribution make our pipeline able to handle cluttered scenes with complex geometry that are challenging to existing techniques. The effectiveness and performance of our approach is evaluated on both real-world and synthetic models.","tags":null,"title":"Automatic modeling of cluttered multi-room floor plans from panoramic images","type":"publication"},{"authors":["Thomas Alderighi","Daniela Giorgi","Luigi Malomo","Paolo Cignoni","Monica Zoppè"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"5fdd08b0958ab8fe03fb170a1ebc4908","permalink":"http://vcg.isti.cnr.it/publication/2019/AGMCZ19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/AGMCZ19/","section":"publication","summary":"We propose a fabrication technique for the fast and cheap production of 3D replicas of proteins. We leverage silicone casting with rigid molds, to produce flexible models which can be safely extracted from the mold, and easily manipulated to simulate the biological interaction mechanisms between proteins. We believe that tangible models can be useful in education as well as in laboratory settings, and that they will ease the understanding of fundamental principles of macromolecular organization.","tags":null,"title":"Computational fabrication of macromolecules to enhance perception and understanding of biological mechanisms","type":"publication"},{"authors":["Francesco Laccone","Luigi Malomo","Maurizio Froli","Paolo Cignoni","Nico Pietroni"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"27eb0900b915c08d80bfe7fd79294ca5","permalink":"http://vcg.isti.cnr.it/publication/2019/LMFCP19a/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/LMFCP19a/","section":"publication","summary":"Shells made of structural glass are charming objects from both the aesthetics and the engineering point of view. However, they pose two signicant challenges: the rst one is to assure adequate safety and redundancy concerning possible global collapse; the second one is to guarantee the economy for replacing collapsed components. To address both requirements, this research explores a novel concept where triangular panels of structural glass are both post-tensioned and reinforced to create 3D free-form systems. Hence, the ligree steel truss, made of edges reinforcements, is sized in performance-based perspective to bear at least the weight of all panels in the occurrence of simultaneous cracks (worst-case scenario). The panels are post-tensioned using a set of edge-aligned cables that add benecial compressive stress on the surface. The cable placement and pre-loads are optimized to minimize the tensile stress acting on the shell and match the manufacturing constraints. These shells optimize material usage by providing not only a transparent and fascinating building separation but also load-bearing capabilities. Visual and structural lightness are improved to grid shell competitors.","tags":null,"title":"Concept and cable-tensioning optimization of post-tensioned shells made of structural glass","type":"publication"},{"authors":["Nicola Capece","Francesco Banterle","Paolo Cignoni","Fabio Ganovelli","Roberto Scopigno","Ugo Erra"],"categories":null,"content":" 10.1016/j.image.2019.05.013\n","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"e38a7e3c0b5b83b8de0e2fd0d16bfe50","permalink":"http://vcg.isti.cnr.it/publication/2019/CBCGSE19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/CBCGSE19/","section":"publication","summary":"Abstract We present a method for turning a flash selfie taken with a smartphone into a photograph as if it was taken in a studio setting with uniform lighting. Our method uses a convolutional neural network trained on a set of pairs of photographs acquired in an ad-hoc acquisition campaign. Each pair consists of one photograph of a subject's face taken with the camera flash enabled and another one of the same subject in the same pose illuminated using a photographic studio-lighting setup. We show how our method can amend defects introduced by a close-up camera flash, such as specular highlights, shadows, skin shine, and flattened images. Website to the official publication: Signal Processing: Image Communication. DOI: 10.1016/j.image.2019.05.013. Results Samples of validation data. Each group of images is composed of: the original image taken with the smartphone flash (top left); the flash image to which the bilateral filter was applied (bottom left); the image reconstructed by the difference prediction of the CNN (center); the ground truth reconstructed (top right); the ground truth (bottom right). \\revision{The SSIM was computed by comparing the central image of each group and the image at top right.","tags":null,"title":"Deep Flash : Turning a Flash Selfie Into a Studio Portrait","type":"publication"},{"authors":["Roberto Scopigno","Gabriele Guidi","Roberto Bellucci","Eliana Siotto","Paolo Pingi","Gianpaolo Palma"],"categories":null,"content":" ","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"1b14ab7b888b64589eb10d100c2265c6","permalink":"http://vcg.isti.cnr.it/publication/2019/PPSBGS19a/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/PPSBGS19a/","section":"publication","summary":"3D scanning is an effective technology for dealing at different levels the state of conservation/deformation of a panel painting, from the micro-geometry of the craquelure to the macro-geometry of the supported used. Unfortunately, the current solutions used to analyze multiple 3D scans acquired over time are based on very controlled acquisition procedures, such as the use of target reference points that are stationary over time and fixed to the artwork, or on complex hardware setups to keep the acquisition device fixed to the artwork. These procedures are challenging when a long monitoring period is involved or during restoration when the painting may be moved several times. This paper presents a new and robust approach to observe and quantify the panel deformations of artworks by comparing 3D models acquired with different scanning devices at different times. The procedure is based on a non-rigid registration algorithm that deforms one 3D model over the other in a controlled way, extracting the real deformation field. We apply the method to the 3D scanning data of the unfinished panel painting ``Adorazione dei Magi'' by Leonardo da Vinci. The data were acquired in 2002 and 2015. First, we analyze the two 3D models with the classical distance from the ideal flat plane of the painting. Then we study the type of deformation of each plank of the support by fitting a quadric surface. Finally, we compare the models before and after the deformation computed by a non-rigid registration algorithm. This last comparison enables the panel deformation to be separated from the structural changes (e.g. the structural restorations on the back and the missing pieces) of the artwork in a more robust way.","tags":null,"title":"Deformation analysis of Leonardo da Vinci\u0026apos;s \u0026ldquo;Adorazione dei Magi\u0026rdquo; through temporal unrelated 3D digitization","type":"publication"},{"authors":["Massimo Zallocco","Holly Wright","Lior Wolf","Lorenc Vila","Roberto Scopigno","Julian Richards","Michael Remmy","Eva Miguel Gascon","Marisol Madrid I Fernandez","Barak Itkin","Miguel Angel Hervas","Maria Letizia Gualandi","Gabriele Gattiglia","Tim Evans","Diego Lucendo Diaz","Nachum Dershowitz","Marco Callieri","Jaume Buxeda i Garrigos","Francesco Banterle","Francesca Anichini"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"20507f8ffe63c5b282f0ef2b05d032bf","permalink":"http://vcg.isti.cnr.it/publication/2019/ABBCDDEGGHIMMRRSVWWZ/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/ABBCDDEGGHIMMRRSVWWZ/","section":"publication","summary":"","tags":null,"title":"Developing the ArchAIDE application: A digital workflow for identifying, organising and sharing archaeological pottery using automated image recognition","type":"publication"},{"authors":["Maurizio Froli","Linda Giresini","Francesco Laccone"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"f9c4f0e046abb8c58948a46f0039f8df","permalink":"http://vcg.isti.cnr.it/publication/2019/FGL19a/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/FGL19a/","section":"publication","summary":"In the field of seismic risk mitigation of art objects, an innovative isolation device is here il-lustrated. The device, called TROCKSISD (Tribological ROCKing Seismic ISolation Device), couples multiple components to dissipate energy and control smooth rocking: spherical con-tact surfaces with frictional layers, elastic springs ensuring re-centering and viscous elastic dampers. The conceptual idea is described and the equations of motions of the two degrees of freedom system presented, discussing the performance-based structural behaviour and the mechanical/geometric parameters involved. Moreover, dynamic analyses are performed to understand the role of the frictional layers with respect to the peripheral dampers in the miti-gation of motion under spectrum compatible seismic records. The results in terms of rocking spectra are presented and comparisons with the equivalent single degree of freedom system without the isolation device are made.","tags":null,"title":"Dynamics of a new seismic isolation device based on tribological smooth rocking (TROCKSISD)","type":"publication"},{"authors":["Federico Ponchio","Marco Callieri","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"1639fc9a93070ce9b7efa809a6c5ab03","permalink":"http://vcg.isti.cnr.it/publication/2019/PCDS19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/PCDS19/","section":"publication","summary":"","tags":null,"title":"Effective Annotations Over 3D Models","type":"publication"},{"authors":["Alessandro Artusi","Francesco Banterle","Alejandro Moreo","Fabio Carrara"],"categories":null,"content":" link to the paper\n","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"e445cbb3e191b8ec811eafe758563800","permalink":"http://vcg.isti.cnr.it/publication/2019/ABMC19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/ABMC19/","section":"publication","summary":"Abstract Image metrics based on Human Visual System (HVS) play a remarkable role in the evaluation of complex image processing algorithms. However, mimicking the HVS is known to be complex and computationally expensive (both in terms of time and memory), and its usage is thus limited to a few applications and to small input data. All of this makes such metrics not fully attractive in real-world scenarios. To address these issues, we propose Deep Image Quality Metric (DIQM), a deep-learning approach to learn the global image quality feature (mean-opinion-score). DIQM can emulate existing visual metrics efficiently, reducing the computational costs by more than an order of magnitude with respect to existing implementations.\n\n\nTimings Our method is extremely computationally efficient because the transfer of knowledge from HDR-VDP to a CNN allows us to speed-up computations by performing only simple convolutions. When we compare our method (DIQM) to classic HDR-VDP (MATLAB implementation and its CUDA version), we can measure 1-2 orders of magnitude of speed-up.\n\n\n\n\n\n\nApplications Our method can be employed to optimize the parameters for HDR compression, tone mapping, and inverse tone mapping. This can be achieved with classic metrics such as HDR-VDP and DRIIM. However, these metrics are computationally expensive and a lot of time (e.g., minutes) would be required to optimize the parameters of a low-resolution image. Our method can manage these tasks in a few seconds.\n\n\n\n\n\n\n\nTone mapped HDR image without parameters optimization. Tone mapped HDR image with parameters optimization using our method.\n\n\n\n\n\n\n\n\nlink to the paper","tags":null,"title":"Efficient Evaluation of Image Quality via Deep-Learning Approximation of Perceptual Metrics ","type":"publication"},{"authors":["Francesco Laccone","Luigi Malomo","Jesús Pérez","Nico Pietroni","Federico Ponchio","Bernd Bickel","Paolo Cignoni"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"427afceef1b19f1fd3b34a9966357c77","permalink":"http://vcg.isti.cnr.it/publication/2019/LMPPPBC19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/LMPPPBC19/","section":"publication","summary":"Bending-active structures are able to efficiently produce complex curved shapes starting from flat panels. The desired deformation of the panels derives from the proper selection of their elastic properties. Optimized panels, called FlexMaps, are designed such that, once they are bent and assembled, the resulting static equilibrium configuration matches a desired input 3D shape. The FlexMaps elastic properties are controlled by locally varying spiraling geometric mesostructures, which are optimized in size and shape to match the global curvature (i.e., bending requests) of the target shape. The design pipeline starts from a quad mesh representing the input 3D shape, which determines the edge size and the total amount of spirals: every quad will embed one spiral. Then, an optimization algorithm tunes the geometry of the spirals by using a simplified pre-computed rod model. This rod model is derived from a non-linear regression algorithm which approximates the non-linear behavior of solid FEM spiral models subject to hundreds of load combinations. This innovative pipeline has been applied to the project of a lightweight plywood pavilion named FlexMaps Pavilion, which is a single-layer piecewise twisted arc that fits a bounding box of 3.90x3.96x3.25 meters.","tags":null,"title":"FlexMaps Pavilion: a twisted arc made of mesostructured flat flexible panels","type":"publication"},{"authors":["Matteo Bracci","Marco Tarini","Nico Pietroni","Marco Livesu","Paolo Cignoni"],"categories":null,"content":" www.hexalab.net\n","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"4a45fbb559c826bec6fe37c961cfd8af","permalink":"http://vcg.isti.cnr.it/publication/2019/BTPLC19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/BTPLC19/","section":"publication","summary":"We introduce HexaLab: a WebGL application for real time visualization, exploration and assessment of hexahedral meshes. HexaLab can be used by simply opening www.hexalab.net. Our visualization tool targets both users and scholars. Practitioners who employ hexmeshes for Finite Element Analysis, can readily check mesh quality and assess its usability for simulation. Researchers involved in mesh generation may use HexaLab to perform a detailed analysis of the mesh structure, isolating weak points and testing new solutions to improve on the state of the art and generate high quality images. To this end, we support a wide variety of visualization and volume inspection tools. Our system offers also immediate access to a repository containing all the publicly available meshes produced with the most recent techniques for hexmesh generation. We believe HexaLab, providing a common tool for visualizing, assessing and distributing results, will push forward the recent strive for replicability in our scientific community","tags":null,"title":"HexaLab.net: An online viewer for hexahedral meshes","type":"publication"},{"authors":["Manuele Sabbadin","Gianpaolo Palma","Francesco Banterle","Tamy Boubekeur","Paolo Cignoni"],"categories":null,"content":" Slides ","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"d7bcf57b12a9b8e525824d5fd825682d","permalink":"http://vcg.isti.cnr.it/publication/2019/SPBBC19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/SPBBC19/","section":"publication","summary":"Acquired 3D point clouds make possible quick modeling of virtual scenes from the real world.With modern 3D capture pipelines, each point sample often comes with additional attributes such as normal vector and color response. Although rendering and processing such data has been extensively studied, little attention has been devoted using the light transport hidden in the recorded per-sample color response to relight virtual objects in visual effects (VFX) look-dev or augmented reality (AR) scenarios. Typically, standard relighting environment exploits global environment maps together with a collection of local light probes to reflect the light mood of the real scene on the virtual object. We propose instead a unified spatial approximation of the radiance and visibility relationships present in the scene, in the form of a colored point cloud. To do so, our method relies on two core components: High Dynamic Range (HDR) expansion and real-time Point-Based Global Illumination (PBGI). First, since an acquired color point cloud typically comes in Low Dynamic Range (LDR) format, we boost it using a single HDR photo exemplar of the captured scene that can cover part of it. We perform this expansion efficiently by first expanding the dynamic range of a set of renderings of the point cloud and then projecting these renderings on the original cloud. At this stage, we propagate the expansion to the regions not covered by the renderings or with low-quality dynamic range by solving a Poisson system. Then, at rendering time, we use the resulting HDR point cloud to relight virtual objects, providing a diffuse model of the indirect illumination propagated by the environment. To do so, we design a PBGI algorithm that exploits the GPU's geometry shader stage as well as a new mipmapping operator, tailored for G-buffers, to achieve real-time performances. As a result, our method can effectively relight virtual objects exhibiting diffuse and glossy physically-based materials in real time. Furthermore, it accounts for the spatial embedding of the object within the 3D environment. We evaluate our approach on manufactured scenes to assess the error introduced at every step from the perfect ground truth. We also report experiments with real captured data, covering a range of capture technologies, from active scanning to multiview stereo reconstruction. \t \t\t \t Slides","tags":null,"title":"High Dynamic Range Point Clouds for Real-Time Relighting","type":"publication"},{"authors":["Ific Goudé","Rémi Cozot","Francesco Banterle"],"categories":null,"content":"link\n","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"3f0ea5f1e512968dfbb47581e17eb610","permalink":"http://vcg.isti.cnr.it/publication/2019/GCB19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/GCB19/","section":"publication","summary":"Abstract We propose a Tone Mapping Operator, denoted HMD-TMO, dedicated to the visualization of 360° High Dynamic Range images on Head Mounted Displays. The few existing studies about this topic have shown that the existing Tone Mapping Operators for classic 2D images are not adapted to 360° High Dynamic Range images. Consequently, several dedicated operators have been proposed. Instead of operating on the entire 360° image, they only consider the part of the image currently viewed by the user. Tone mapping a part of the 360° image is less challenging as it does not preserve the global luminance dynamic of the scene. To cope with this problem, we propose a novel tone mapping operator which takes advantage of both a view-dependant tone mapping that enhances the contrast, and a Tone Mapping Operator applied to the entire 360° image that preserves global coherency. Furthermore, we present a subjective study to model lightness perception in a Head Mounted Display. Official link to the publication.","tags":null,"title":"HMD-TMO: A Tone Mapping Operator for 360 HDR Images Visualization for Head Mounted Displays","type":"publication"},{"authors":["Eliana Siotto"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"7e86fcf8e31295fa6779f62437157c5c","permalink":"http://vcg.isti.cnr.it/publication/2019/Sio19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/Sio19/","section":"publication","summary":"","tags":null,"title":"Identification of gilding techniques on Roman marble sarcophagi","type":"publication"},{"authors":["Massimiliano Corsini","Francesco Banterle","Federico Ponchio","Paolo Cignoni"],"categories":null,"content":" link to the paper\n","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"6695161019e8dfd5e2aea8e16b5225f0","permalink":"http://vcg.isti.cnr.it/publication/2019/CBPC19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/CBPC19/","section":"publication","summary":"Abstract In the last years, the development of compression algorithms for image collections (e.g., photo albums) has become very popular due to the enormous diffusion of digital photographs. Typically, current solutions create an image sequence from images of the photo album to make them suitable for compression using a High Performance Video Coding (HEVC) encoder. In this study, we investigated a different approach to compress a collection of similar images. Our main idea is to exploit the inter- and intra- patch redundancy to compress the entire set of images. In practice, our approach is equivalent to compress the image set with Vector Quantization (VQ) using a global codebook. Our tests show that our clusterization algorithm is effective for a large number of images.\n\n\n\nlink to the paper","tags":null,"title":"Image Sets Compression via Patch Redundancy ","type":"publication"},{"authors":["Alessandro Muntoni","Stefano Nuvoli","Andreas Scalas","Alessandro Tola","Luigi Malomo","Riccardo Scateni"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"6bb7bfc4c41dc3a5df23f187017b5087","permalink":"http://vcg.isti.cnr.it/publication/2019/MNSTMS19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/MNSTMS19/","section":"publication","summary":"We introduce a pipeline for simplifying digital 3D shapes and fabricate them using 2D polygonal flat parts. Our method generates shapes that, once unfolded, can be fabricated with CNC milling machines using special tools called V-Grooves. These tools create V-shaped furrows at given angles depending on the shape of the used tool. Milling the edges of each flat facet simplifies the manual assembly, which consists only in folding adjacent facets at a constrained angle. Our method generates simplified shapes where every dihedral angle between adjacent facets belongs to a restricted set, thus making the assembly process quicker and more straightforward. Firstly, our method automatically computes a simplified version of the input model, using the marching cubes algorithm on the original mesh and iteratively performing local changes on the resulting triangle mesh. The user can then perform an additional manual simplification to remove unwanted facets. Finally, an unfolding algorithm, which takes into account the thickness of the material, flattens the polygonal facets onto the 2D plane, so that a CNC milling machine can fabricate it from a sheet of rigid material.","tags":null,"title":"Mill and fold: Shape simplification for fabrication","type":"publication"},{"authors":["Stefano Nuvoli","Alex Hernandez","Claudio Esperança","Riccardo Scateni","Paolo Cignoni","Nico Pietroni"],"categories":null,"content":"here\n","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"a5789efe0d49952b845607218a6f5060","permalink":"http://vcg.isti.cnr.it/publication/2019/NHESCP19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/NHESCP19/","section":"publication","summary":"We propose QuadMixer, a novel interactive technique to compose quad mesh components preserving the majority of the original layouts. Quad Layout is a crucial property for many applications since it conveys important information that would otherwise be destroyed by techniques that aim only at preserving shape. Our technique keeps untouched all the quads in the patches which are not involved in the blending. We rst perform robust boolean operations on the corresponding triangle meshes. Then we use this result to identify and build new surface patches for small regions neighboring the intersection curves. These blending patches are carefully quadrangulated respecting boundary constraints and stitched back to the untouched parts of the original models. The resulting mesh preserves the designed edge ow that, by construction, is captured and incorporated to the new quads as much as possible. We present our technique in an interactive tool to show its usability and robustness.\n\n\nClick here download the slides.","tags":null,"title":"QuadMixer: Layout Preserving Blending of Quadrilateral Meshes","type":"publication"},{"authors":["Marco Potenziani","Paolo Pingi","Gaia Pavoni","Aurelia Lureau","Matteo Dellepiane","Marco Callieri","Roberto Scopigno"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"91d8b1817e0830b466779550b13c7faf","permalink":"http://vcg.isti.cnr.it/publication/2019/CDLPPPS19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/CDLPPPS19/","section":"publication","summary":"","tags":null,"title":"Rilievo 3D di Alchimia, ed uso dei modelli 3D per studio e divulgazione","type":"publication"},{"authors":["Marco Callieri","Massimiliano Corsini","Gaia Pavoni","Marco Palma","Roberto Scopigno"],"categories":null,"content":" ","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"208cb1be7e25272c19c3f243717f4c46","permalink":"http://vcg.isti.cnr.it/publication/2019/PCCPS19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/PCCPS19/","section":"publication","summary":"Visual sampling techniques represent a valuable resource for a rapid, non-invasive data acquisition for underwater monitoring purposes. Long-term monitoring projects usually requires the collection of large quantities of data, and the visual analysis of a human expert operator remains, in this context, a very time consuming task. It has been estimated that only the 1-2% of the acquired images are later analyzed by scientists (Beijbom et al., 2012). Strategies for the automatic recognition of benthic communities are required to effectively exploit all the information contained in visual data. Supervised learning methods, the most promising classification techniques in this field, are commonly affected by two recurring issues: the wide diversity of marine organism, and the small amount of labeled data. In this work, we discuss the advantages offered by the use of annotated high resolution ortho-mosaics of seabed to classify and segment the investigated specimens, and we suggest several strategies to obtain a considerable per-pixel classification performance although the use of a reduced training dataset composed by a single ortho-mosaic. The proposed methodology can be applied to a large number of different species, making the procedure of marine organism identification an highly adaptable task.","tags":null,"title":"Semantic Segmentation of Benthic Communities from Ortho-Mosaic Maps","type":"publication"},{"authors":["Patrick Marais","Matteo Dellepiane","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"7e75bfb808413484969a495620653363","permalink":"http://vcg.isti.cnr.it/publication/2019/MDCS19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/MDCS19/","section":"publication","summary":" ","tags":null,"title":"Semi-automated Cleaning of Laser Scanning Campaigns with Machine Learning","type":"publication"},{"authors":["Nico Pietroni","Bernd Bickel","Luigi Malomo","Paolo Cignoni"],"categories":null,"content":"Link to the State of the Art Document\nLink to the Presentation\n","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"28c79134ae3b6a62c915cb93fbd50f53","permalink":"http://vcg.isti.cnr.it/publication/2019/PBMC19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/PBMC19/","section":"publication","summary":"Digital fabrication devices are powerful tools for creating tangible reproductions of 3D digital models. Most available printing technologies aim at producing an accurate copy of a tridimensional shape. However, fabrication technologies can also be used to create a stylistic representation of a digital shape. We refer to this class of methods as \"stylized fabrication methods.\" These methods abstract geometric and physical features of a given shape to create an unconventional representation, to produce an optical illusion, or to devise a particular interaction with the fabricated model. In this state-of-the-art report, we classify and overview this broad and emerging class of approaches and also propose possible directions for future research.\t Link to the State of the Art Document Link to the Presentation","tags":null,"title":"State of the Art on Stylized Fabrication","type":"publication"},{"authors":["Mattia G. Bergomi","Patrizio Frosini","Daniela Giorgi","Nicola Quercioli"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"692bb719431009875617e6cd54e7da77","permalink":"http://vcg.isti.cnr.it/publication/2019/BFGQ19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/BFGQ19/","section":"publication","summary":"We provide a general mathematical framework for group and set equivariance in machine learning. We define group equivariant non-expansive operators (GENEOs) as maps between function spaces associated with groups of transformations. We study the topological and metric properties of the space of GENEOs to evaluate their approximating power and set the basis for general strategies to initialize and compose operators. We define suitable pseudo-metrics for the function spaces, the equivariance groups and the set of non-expansive operators. We prove that, under suitable assumptions, the space of GENEOs is compact and convex. These results provide fundamental guarantees in a machine learning perspective. By considering isometry-equivariant non-expansive operators, we describe a simple strategy to select and sample operators. Thereafter, we show how selected and sampled operators can be used both to perform classical metric learning and to inject knowledge in artificial neural networks. Paper","tags":null,"title":"Towards a topological–geometrical theory of group equivariant non-expansive operators for data analysis and machine learning","type":"publication"},{"authors":["Riccardo Costanzi","Arianna Gasparri","Francesca Pacienza","Lorenzo Pollini","Andrea Caiti","Vincenzo Manzari","Daniele Terracciano","Mirko Stifani","Gaia Pavoni","Marco Callieri","Cinzia Barbieri","Fabrizia Colonna","Federico Gaino","Paolo Moretto","Carlo Emanuele Pepe","Andrea Romanelli"],"categories":null,"content":"","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"66ad6f677017d25bf99dc73676fa72ad","permalink":"http://vcg.isti.cnr.it/publication/2019/CGPPCMTSPCBCGMPR19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/CGPPCMTSPCBCGMPR19/","section":"publication","summary":"","tags":null,"title":"Visual acquisition system for georeferenced monitoring and reconstruction of the sea bottom using audio for data synchronisation","type":"publication"},{"authors":["Thomas Alderighi","Luigi Malomo","Daniela Giorgi","Bernd Bickel","Paolo Cignoni","Nico Pietroni"],"categories":null,"content":" Pentagonal Icositetrahedron Laura Taalman\u0026gt;\nPresentation slides (.pptx)\n","date":1546300800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1546300800,"objectID":"c63087240ad1b8d4acba322f106a2647","permalink":"http://vcg.isti.cnr.it/publication/2019/AMGBCP19/","publishdate":"2019-01-01T00:00:00Z","relpermalink":"/publication/2019/AMGBCP19/","section":"publication","summary":"We propose a novel technique for the automatic design of molds to cast highly complex shapes. The technique generates composite, two-piece molds. Each mold piece is made up of a hard plastic shell and a flexible silicone part. Thanks to the thin, soft, and smartly shaped silicone part, which is kept in place by a hard plastic shell, we can cast objects of unprecedented complexity. An innovative algorithm based on a volumetric analysis defines the layout of the internal cuts in the silicone mold part. Our approach can robustly handle thin protruding features and intertwined topologies that have caused previous methods to fail. We compare our results with state of the art techniques, and we demonstrate the casting of shapes with extremely complex geometry. Acknowledgment Errata Corrige: we forgot to list in the acknowledgment the source of one of the model the caged knot, namely the one used in the above teaser. The Catalan Solid cage containing the knot is a derivative work of the Pentagonal Icositetrahedron by Laura Taalman\u003e Presentation slides (.pptx)","tags":null,"title":"Volume-Aware Design of Composite Molds","type":"publication"},{"authors":["Ute Dercks","Federico Ponchio","Roberto Scopigno"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"2f2906d1b7928e017ea97ba9be21534f","permalink":"http://vcg.isti.cnr.it/publication/2018/DPS18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/DPS18/","section":"publication","summary":"","tags":null,"title":"\tCENOBIUM 10 years after: an evolving platform for Digital Humanities ","type":"publication"},{"authors":["Giovanni Pintore","Fabio Ganovelli","Ruggero Pintus","Roberto Scopigno","Enrico Gobbetti"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"123d682e387f2b1275d30fb21597e4f8","permalink":"http://vcg.isti.cnr.it/publication/2018/PGPSG18a/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PGPSG18a/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstract We present a novel approach to automatically recover, from a small set of partially overlapping spherical images, an indoor structure representation in terms of a 3D floor plan registered with a set of 3D environment maps. % We introduce several improvements over previous approaches based on color/spatial reasoning exploiting \\emph{Manhattan World} priors. In particular, we introduce a new method for geometric context extraction based on a 3D facets representation, which combines color distribution analysis of individual images with sparse multi-view clues. Moreover, we introduce an efficient method to combine the facets from different points of view in a single consistent model, considering the reliability of the facets contribution. The resulting capture and reconstruction pipeline automatically generates 3D multi-room environments where most of the other previous approaches fail, such as in presence of hidden corners and large clutter, even without involving additional dense 3D data or tools. % We demonstrate the effectiveness and performance of our approach on different real-world indoor scenes. Our test data will be released to allow for further studies and comparisons.","tags":null,"title":"3D Floor Recovery from Overlapping Spherical Images","type":"publication"},{"authors":["Paola Derudas","Maria Carla Sgarella","Marco Callieri"],"categories":null,"content":" ","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"ab6635853efe4f117b920a70f80328ad","permalink":"http://vcg.isti.cnr.it/publication/2018/DSC18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/DSC18/","section":"publication","summary":" ","tags":null,"title":"A 3D Digital Approach for the Study and Presentation of the Bisarcio Site","type":"publication"},{"authors":["Federico Ponchio","Massimiliano Corsini","Roberto Scopigno"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"b75a65afc7418594912b16edf86f15a3","permalink":"http://vcg.isti.cnr.it/publication/2018/PCS18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PCS18/","section":"publication","summary":"","tags":null,"title":"A Compact Representation of Relightable Images for the Web","type":"publication"},{"authors":["Eliana Siotto","Gianpaolo Palma","Marco Potenziani","Roberto Scopigno"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"ce87b70458e7e2dac21fa30aca681321","permalink":"http://vcg.isti.cnr.it/publication/2018/SPPS18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/SPPS18/","section":"publication","summary":"","tags":null,"title":"A Web-based system for data integration and visualization of the ancient colour ","type":"publication"},{"authors":["Alessandro Artusi","Tania Pouli","Francesco Banterle","Ahmet Oguz Akyuz"],"categories":null,"content":"link to the paper\n","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"74f45e795011fef2a536663b64637e20","permalink":"http://vcg.isti.cnr.it/publication/2018/APBA18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/APBA18/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstract High dynamic range (HDR) images require tone reproduction to match the range of values to the capabilities of a display. For computational reasons and given the absence of fully calibrated imagery, rudimentary color reproduction is often added as a post-processing step rather than integrated into tone reproduction algorithms. In the general case, this currently requires manual parameter tuning, and can be automated only for some global tone reproduction operators by inferring parameters from the tone curve. We present a novel and fully automatic saturation correction technique, suitable for any tone reproduction operator (including inverse tone reproduction), which exhibits fewer distortions in hue and luminance reproduction than the current state-of-the-art. We validated its comparative effectiveness through subjective experiments and objective metrics. Our experiments confirm that saturation correction significantly contributes toward the perceptually plausible color reproduction of tonemapped content and would, therefore, be useful in any color-critical application.\nlink to the paper","tags":null,"title":"Automatic saturation correction for dynamic range management algorithms","type":"publication"},{"authors":["Marco Potenziani","Marco Callieri","Roberto Scopigno"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"31b18aa5ab75f567b6ed7d1d99809c6e","permalink":"http://vcg.isti.cnr.it/publication/2018/PCS18a/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PCS18a/","section":"publication","summary":"3DHOP (3D Heritage On-line Presenter) has been released 4 years ago, as an open-source framework for the creation of interactive visualization of 3D content on the web, aimed at the CH field. Transforming a research tool into a software \"product\" usable by the heterogeneous CH community is not a simple task and requires a significant amount of resources plus a specific design. This work presents the evolution of the 3DHOP system, and the complex relationship with its community of users, made of content creators, CH experts and general public. We will discuss the new features introduced, as well as the design and implementation strategy employed to maintain the software and make it usable by developers. We will evaluate the effectiveness of the platform by illustrating some of the applications built with 3DHOP either internally or by external users, as well as by presenting the results of a survey aimed at gathering the opinions and suggestions of the user community.","tags":null,"title":"Developing and Maintaining a Web 3D Viewer for the CH Community: an Evaluation of the 3DHOP Framework","type":"publication"},{"authors":["Werner Schweibenz","Roberto Scopigno"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"ccdc2df4836212b5ee3754e0e330eae9","permalink":"http://vcg.isti.cnr.it/publication/2018/SS18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/SS18/","section":"publication","summary":"","tags":null,"title":"Documenting past exhibitions. Why and how information technology could help to preserve dismantled shows","type":"publication"},{"authors":["Gianpaolo Palma","Manuele Sabbadin","Massimiliano Corsini","Paolo Cignoni"],"categories":null,"content":" ","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"875bda46bf3587e190facd7087cf7d01","permalink":"http://vcg.isti.cnr.it/publication/2018/PSCC18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PSCC18/","section":"publication","summary":"The wide availability of 3D acquisition devices makes viable their use for shape monitoring. The current techniques for the analysis of time-varying data can efficiently detect actual significant geometric changes and rule out differences due to irrelevant variations (like sampling, lighting, coverage). On the other hand, the effective visualization of such detected changes can be challenging when we want to show at the same time the original appearance of the 3D model. In this paper, we propose a dynamic technique for the effective visualization of detected differences between two 3D scenes. The presented approach, while retaining the original appearance, allows the user to switch between the two models in a way that enhances the geometric differences that have been detected as significant. Additionally, the same technique is able to visually hides the other negligible, yet visible, variations. The main idea is to use two distinct screen space time-based interpolation functions for the significant 3D differences and for the small variations to hide. We have validated the proposed approach in a user study on a different class of datasets, proving the objective and subjective effectiveness of the method. \t\tInteractive Web Application","tags":null,"title":"Enhanced Visualization of Detected 3D Geometric Differences","type":"publication"},{"authors":["Filippo A. Fanni","Gianmarco Cherchi","Alessandro Muntoni","Alessandro Tola","Riccardo Scateni"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"e8a8f225d6f6ced90cbad0395d3220b1","permalink":"http://vcg.isti.cnr.it/publication/2018/FCMTS18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/FCMTS18/","section":"publication","summary":"","tags":null,"title":"Fabrication Oriented Shape Decomposition using Polycube Mapping","type":"publication"},{"authors":["Wei Fan","Giuseppe Valenzise","Francesco Banterle","Frederic Dufaux"],"categories":null,"content":"Link\n","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"bdcba3ccca373b3377d1279f73f5b40a","permalink":"http://vcg.isti.cnr.it/publication/2018/FVBD18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/FVBD18/","section":"publication","summary":"Abstract High dynamic range (HDR) imaging enables to capture the full range of physical luminance of a real-world scene, and is expected to progressively replace traditional low dynamic range (LDR) pictures and videos. Despite the increasing HDR popularity, very little attention has been devoted to new forensic problems that are characteristic to this content. In this paper, we address for the first time such kind of problem, by identifying the source of an HDR picture. Specifically, we consider the two currently most common techniques to generate an HDR image: by fusing multiple LDR images with different exposure time, or by inverse tone mapping an LDR picture. We show that, in order to apply conventional forensic tools to HDR images, they need to be properly preprocessed, and we propose and evaluate a few simple HDR forensic preprocessing strategies for this purpose. In addition, we propose a new forensic feature based on Fisher scores, calculated under Gaussian mixture models. We show that the proposed feature outperforms the popular SPAM features in classifying the HDR image source on image blocks as small as 3x3, which makes our method suitable to detect composite forgeries combining HDR patches originating from different acquisition processes. Link to the official publication.","tags":null,"title":"Fine-grained detection of inverse tone mapping in HDR images","type":"publication"},{"authors":["Luigi Malomo","Jesús Pérez","Emmanuel Iarussi","Nico Pietroni","Eder Miguel","Paolo Cignoni","Bernd Bickel"],"categories":null,"content":" ","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"215eca79706cb031c19b9ce20a3b3709","permalink":"http://vcg.isti.cnr.it/publication/2018/MPIPMCB18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/MPIPMCB18/","section":"publication","summary":"Abstract We propose FlexMaps, a novel framework for fabricating smooth shapes out of flat, flexible panels with tailored mechanical properties. We start by mapping the 3D surface onto a 2D domain as in traditional UV mapping to design a set of deformable flat panels called FlexMaps. For these panels, we design and obtain specific mechanical properties such that, once they are assembled, the static equilibrium configuration matches the desired 3D shape. FlexMaps can be fabricated from an almost rigid material, such as wood or plastic, and are made flexible in a controlled way by using computationally designed spiraling microstructures.","tags":null,"title":"FlexMaps: Computational Design of Flat Flexible Shells for Shaping 3D Objects","type":"publication"},{"authors":["Thomas Alderighi","Luigi Malomo","Daniela Giorgi","Nico Pietroni","Bernd Bickel","Paolo Cignoni"],"categories":null,"content":" Slides ","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"09b7346c10156ecd6a5bae5a77d933f8","permalink":"http://vcg.isti.cnr.it/publication/2018/AMGPBC18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/AMGPBC18/","section":"publication","summary":"We propose a new method for fabricating digital objects through reusable silicone molds. Molds are generated by casting liquid silicone into custom 3D printed containers called metamolds. Metamolds automatically define the cuts that are needed to extract the cast object from the silicone mold. The shape of metamolds is designed through a novel segmentation technique, which takes into account both geometric and topological constraints involved in the process of mold casting. Our technique is simple, does not require changing the shape or topology of the input objects, and only requires of-the-shelf materials and technologies. We successfully tested our method on a set of challenging examples with complex shapes and rich geometric detail. \t \t\t \t\t \t Slides","tags":null,"title":"Metamolds: computational design of silicone molds","type":"publication"},{"authors":["Marco Potenziani","Marco Callieri","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"4b35e6708dadfe43285e668e79081390","permalink":"http://vcg.isti.cnr.it/publication/2018/PCDS18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PCDS18/","section":"publication","summary":"Three-dimensional content is becoming an important component of the World Wide Web environment. From the advent of WebGL to the present, a wide number of solutions have been developed (including libraries, middleware, and applications), encouraging the establishment of 3D data as online media of practical use. The fast development of 3D technologies and related web-based resources makes it difficult to identify and properly understand the current trends and open issues. Starting from these premises, this survey analyzes the state of the art of 3D web publishing, reviews the possibilities provided by the major current approaches, proposes a categorization of the features supported by existing solutions, and cross-maps these with the requirements of a few main application domains. The results of this analysis should help in defining the technical characteristics needed to build efficient and effective 3D data presentation, taking into account the application contexts.","tags":null,"title":"Publishing and Consuming 3D Content on the Web, A Survey","type":"publication"},{"authors":["Carlo Cerrano","Matteo Dellepiane","Marco Callieri","Marco Palma","Gaia Pavoni","Ubaldo Pantaleo","Roberto Scopigno"],"categories":null,"content":" ","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"0ef5ae7aee1e4841fa5fe6109e651261","permalink":"http://vcg.isti.cnr.it/publication/2018/PPCDCPS18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PPCDCPS18/","section":"publication","summary":" ","tags":null,"title":"Quasi-Orthorectified Projection for the Measurement of Red Gorgonian Colonies","type":"publication"},{"authors":["Fabio Ganovelli","Luigi Malomo","Roberto Scopigno"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"3f425ed4621b1164b0acd1b72b33e93a","permalink":"http://vcg.isti.cnr.it/publication/2018/GMS18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/GMS18/","section":"publication","summary":"Abstract We present a novel method for 3D reconstruction of overhead power lines from a few images. The solution to this problem has a deep impact over the strategies adopted to monitor the many thousand kilometres of powerlines innervating our countries;currently, the only effective solution is based on the use of high-end laser scanners mounted on drones. The difficulty with image-based 3D reconstruction algorithms is that images of wires of the power lines typically do not have point features to match among different images. We leverage on a few assumptions that can be made on the power lines case and define an ad-hoc strategy for solving the problem. We first use a Structure from Motion algorithm to retrieve the approximate camera poses and then formulate a minimization problem to simultaneously define a 3D wire hypothesis and refine the camera poses so that the projections of that wire are consistent on the supporting images.","tags":null,"title":"Reconstructing Power Lines from Images","type":"publication"},{"authors":["Giovanni Pintore","Ruggero Pintus","Fabio Ganovelli","Roberto Scopigno","Enrico Gobbetti"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"d8bcac98a91178560e815c3da5f9cbfc","permalink":"http://vcg.isti.cnr.it/publication/2018/PPGSG18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PPGSG18/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstract We present a vision-based approach to automatically recover the 3D \\emph{existing-conditions} information of an indoor structure, starting from a small set of overlapping spherical images. The recovered 3D model includes the \\emph{as-built} 3D room layout with the position of important functional elements located on room boundaries. We first recover the underlying 3D structure as interconnected rooms bounded by walls. This is done by combining geometric reasoning under an Augmented Manhattan World model and Structure-from-Motion. Then, we create, from the original registered spherical images, 2D rectified and metrically scaled images of the room boundaries. Using those undistorted images and the associated 3D data, we automatically detect the 3D position and shape of relevant wall-, floor-, and ceiling-mounted objects, such as electric outlets, light switches, air-vents and light points. As a result, our system is able to quickly and automatically draft an as-built model coupled with its existing conditions using only commodity mobile devices. We demonstrate the effectiveness and performance of our approach on real-world indoor scenes and publicly available datasets.","tags":null,"title":"Recovering 3D existing-conditions of indoor structures from spherical images","type":"publication"},{"authors":["Giovanni Pintore","Fabio Ganovelli","Ruggero Pintus","Roberto Scopigno","Enrico Gobbetti"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"45d529a0a30f7c057af73932d6eb1936","permalink":"http://vcg.isti.cnr.it/publication/2018/PGPSG18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PGPSG18/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstract We present a vision-based approach to automatically recover the 3D \\emph{existing-conditions} information of an indoor structure, starting from a small set of overlapping spherical images. The recovered 3D model includes the \\emph{as-built} 3D room layout with the position of important functional elements located on room boundaries. We first recover the underlying 3D structure as interconnected rooms bounded by walls. This is done by combining geometric reasoning under an Augmented Manhattan World model and Structure-from-Motion. Then, we create, from the original registered spherical images, 2D rectified and metrically scaled images of the room boundaries. Using those undistorted images and the associated 3D data, we automatically detect the 3D position and shape of relevant wall-, floor-, and ceiling-mounted objects, such as electric outlets, light switches, air-vents and light points. As a result, our system is able to quickly and automatically draft an as-built model coupled with its existing conditions using only commodity mobile devices. We demonstrate the effectiveness and performance of our approach on real-world indoor scenes and publicly available datasets.","tags":null,"title":"Recovering 3D indoor floorplans by exploiting low-cost 360 photography","type":"publication"},{"authors":["Gianpaolo Palma","Tamy Boubekeur","Fabio Ganovelli","Paolo Cignoni"],"categories":null,"content":" ","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"bec86953c93ead84f1680a00268b4bed","permalink":"http://vcg.isti.cnr.it/publication/2018/PBGC18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PBGC18/","section":"publication","summary":"We propose a new non-rigid registration method for large 3D meshes from Multi-View Stereo (MVS) reconstruction characterized by low-frequency shape deformations induced by several factors, such as low sensor quality and irregular sampling object coverage. Starting from a reference model to which we want to align a new 3D mesh, our method starts by decomposing it in patches using a Lloyd clustering before running an ICP local registration for each patch. Then, we improve the alignment using few geometric constraints and finally, we build a global deformation function that blends the estimated per-patch transformations. This function is structured on top of a deformation graph derived from the dual graph of the clustering. Our algorithm is iterated until convergence, increasing progressively the number of patches in the clustering to capture smaller deformations. The method comes with a scalable multicore implementation that enables, for the first time, the alignment of meshes made of tens of millions of triangles in a few minutes. We report extensive experiments of our algorithm on several dense Multi-View Stereo models, using a 3D scan or another MVS reconstruction as reference. Beyond MVS data, we also applied our algorithm to different scenarios, exhibiting more complex and larger deformations, such as 3D motion capture dataset or 3D scans of dynamic objects. The good alignment results obtained for both datasets highlights the efficiency and the flexibility of our approach.","tags":null,"title":"Scalable non-rigid registration for multi-view stereo data","type":"publication"},{"authors":["Daniela Pica","Gaia Pavoni","Ubaldo Pantaleo","Monica Rivas Casado","Marco Palma","Carlo Cerrano"],"categories":null,"content":" ","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"5e99352cea835a209ca93389f2853275","permalink":"http://vcg.isti.cnr.it/publication/2018/PRPPPC18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PRPPPC18/","section":"publication","summary":" ","tags":null,"title":"SfM-Based Method to Assess Gorgonian Forests (Paramuricea clavata (Cnidaria, Octocorallia))","type":"publication"},{"authors":["Alessandro Muntoni","Andreas Scalas","Stefano Nuvoli","Riccardo Scateni"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"3acc7b530c089e5857405a228ec8729b","permalink":"http://vcg.isti.cnr.it/publication/2018/MSNS18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/MSNS18/","section":"publication","summary":"","tags":null,"title":"Simplification of Shapes for Fabrication with V-Groove Milling Tools","type":"publication"},{"authors":["Patrick Seemann","Gianpaolo Palma","Matteo Dellepiane","Paolo Cignoni","Michael Goesele"],"categories":null,"content":" ","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"80544a401b9a8ada1c3214469dd2c7d0","permalink":"http://vcg.isti.cnr.it/publication/2018/SPDCG18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/SPDCG18/","section":"publication","summary":"We propose a novel rendering framework for visualizing point data with complex structures and/or different quality of data. The point cloud can be characterized by setting a per-point scalar field associated to the aspect that differentiates the parts of the dataset (i.e. uncertainty given by local normal variation). Our rendering method uses the scalar field to render points as solid splats or semi-transparent spheres with non-uniform density to produce the final image. To that end, we derive a base model for integrating density in (intersecting) spheres for both the uniform and non-uniform setting and introduce a simple and fast approximation which yields interactive rendering speeds for millions of points. Because our method only relies on the basic OpenGL rasterization pipeline, rendering properties can be adjusted in real-time by user. The method has been tested on several datasets with different characteristics, and user studies show that a clearer understanding of the scene is possible in comparison with point splatting techniques and basic transparency rendering.","tags":null,"title":"Soft Transparency for Point Cloud Rendering","type":"publication"},{"authors":["Bernd Bickel","Paolo Cignoni","Luigi Malomo","Nico Pietroni"],"categories":null,"content":" ","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"4daea7684bd7418d4dce382eda451007","permalink":"http://vcg.isti.cnr.it/publication/2018/BCMP18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/BCMP18/","section":"publication","summary":"Digital fabrication devices are powerful tools for creating tangible reproductions of 3D digital models. Most available printing technologies aim at producing an accurate copy of a tridimensional shape. However, fabrication technologies can also be used to create a stylistic representation of a digital shape. We refer to this class of methods as \"stylized fabrication methods.\" These methods abstract geometric and physical features of a given shape to create an unconventional representation, to produce an optical illusion, or to devise a particular interaction with the fabricated model. In this state-of-the-art report, we classify and overview this broad and emerging class of approaches and also propose possible directions for future research. DOI: 10.1111/cgf.13327","tags":null,"title":"State of the Art on Stylized Fabrication","type":"publication"},{"authors":["Akrivi Katifori","Maria Roussou","Sara Perry","Paolo Cignoni","Luigi Malomo","Gianpaolo Palma","George Drettakis","Sebastien Vizcay"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"c4259b83b8c31e247a746e8777868ed5","permalink":"http://vcg.isti.cnr.it/publication/2018/-RPCMPDV18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/-RPCMPDV18/","section":"publication","summary":"","tags":null,"title":"The EMOTIVE Project - Emotive virtual cultural experiences through personalized storytelling","type":"publication"},{"authors":["Eliana Siotto"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"e6eb6e744b8dd1d5ab884f958031ca34","permalink":"http://vcg.isti.cnr.it/publication/2018/Sio18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/Sio18/","section":"publication","summary":"","tags":null,"title":"The use of colour in Roman marble sarcophagi","type":"publication"},{"authors":["Marco Callieri","Roberto Scopigno","Matteo Dellepiane"],"categories":null,"content":"","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"c40136742466594ff270a8e9de561969","permalink":"http://vcg.isti.cnr.it/publication/2018/CSD18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/CSD18/","section":"publication","summary":"","tags":null,"title":"Using Digital 3D Technology for Documenting and Studying the Griffin","type":"publication"},{"authors":["Federico Ponchio","Marion Lamé","Roberto Scopigno","Bruce Robertson"],"categories":null,"content":" ","date":1514764800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1514764800,"objectID":"9f22ea229c7a7d1df39e6ab64bf3b814","permalink":"http://vcg.isti.cnr.it/publication/2018/PLSR18/","publishdate":"2018-01-01T00:00:00Z","relpermalink":"/publication/2018/PLSR18/","section":"publication","summary":" ","tags":null,"title":"Visualizing and Transcribing Complex Writings through RTI","type":"publication"},{"authors":["Fabrizio Ivan Apollonio","Vilma Basilissi","Marco Callieri","Matteo Dellepiane","Marco Gaiani","Federico Ponchio","Francesca Rizzo","Angelo Rubino","Roberto Scopigno","Giorgio Sobrà"],"categories":null,"content":" ","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"18adaeecf6f450dd6fab960f908e1b44","permalink":"http://vcg.isti.cnr.it/publication/2017/ABCDGPRRSS17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/ABCDGPRRSS17/","section":"publication","summary":" ","tags":null,"title":"A 3D-centered information system for the documentation of a complex restoration intervention","type":"publication"},{"authors":["Francesco Banterle","Alessandro Artusi","Kurt Debattista","Alan Chalmers"],"categories":null,"content":"link to the official website\nlink to the HDR Toolbox git repository\n","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"456a28f830ea2f7a84bf8ed698db14ab","permalink":"http://vcg.isti.cnr.it/publication/2017/BADC17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/BADC17/","section":"publication","summary":"abstract\n\n\n\n\n\nlink to the official website\n\nlink to the HDR Toolbox git repository\n\n\nTable of Contents This book is a practical introduction to the field of High Dynamic Range imaging that combines photography, computer vision, and computer graphics. The second edition focuses on HDR video content that is increasing its importance given the introduction in the market of affordable HDR televisions. Furthermore, we have revised and expanded previous content.\nAs in the first edition, the book provides detailed equations and Matlab code. This allows the reader to have the tools for experimenting with HDR Imaging for producing compelling images.\n\n\nThe book is divided in the following chapters:\nIntroduction (a brief introduction on light, human vision, and color spaces);\nHDR Content Generation;\nTone Mapping;\nNew Trend in Tone Mapping;\nHDR Video Tone Mapping;\nExpansion Operators for Low Dynamic Range Content;\nImage-Based Lighting;\nHDR Image Compression;\nHDR Video Compression;\nEvaluation.\n\n\nThe book provides three appendecies on the bilateral filter, color spaces, and how to use the HDR Toolbox for Matlab.","tags":null,"title":"Advanced High Dynamic Range Imaging","type":"publication"},{"authors":["Carlo Meghini","Roberto Scopigno","Julian Richards"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"be407f85587c536ac6dd255eef9b1f4f","permalink":"http://vcg.isti.cnr.it/publication/2017/MSR17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/MSR17/","section":"publication","summary":"","tags":null,"title":"ARIADNE: A Research Infrastructure for Archaeology","type":"publication"},{"authors":["Daniel Coutinho","Ricardo Marroquim","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"b8e67abc43f2b0786696edc8a9dbac5d","permalink":"http://vcg.isti.cnr.it/publication/2017/CMDS17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/CMDS17/","section":"publication","summary":"","tags":null,"title":"Assisted color acquisition for 3D models","type":"publication"},{"authors":["Roi Poranne","Marco Tarini","Sandro Huber","Daniele Panozzo","Olga Sorkine-Hornung"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"631edbd65ef4530b448f45df9ce9fb80","permalink":"http://vcg.isti.cnr.it/publication/2017/PTHPS17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/PTHPS17/","section":"publication","summary":"","tags":null,"title":"Autocuts: Simultaneous Distortion and Cut Optimization for UV Mapping","type":"publication"},{"authors":["Alessandro Vecchione","Marco Callieri"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"7ad2c2506ff7de5433514bcd5d0ac5dc","permalink":"http://vcg.isti.cnr.it/publication/2017/VC17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/VC17/","section":"publication","summary":"","tags":null,"title":"Claudian Aqueduct in Rome, from the 3D survey to the virtual reconstruction according to archaeological records","type":"publication"},{"authors":["Roberto Scopigno","Marco Callieri"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"40c0890b63450ec6ca41d31e966aabe4","permalink":"http://vcg.isti.cnr.it/publication/2017/CS17a/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/CS17a/","section":"publication","summary":"","tags":null,"title":"Dalla digitalizzazione alla riproduzione 3D, per lo studio e la presentazione di un’opera di arte moderna","type":"publication"},{"authors":["Roberto Scopigno","Marco Callieri","Matteo Dellepiane","Federico Ponchio","Marco Potenziani"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"511f63200eceac40b0a817dbe41df9b3","permalink":"http://vcg.isti.cnr.it/publication/2017/SCDPP17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/SCDPP17/","section":"publication","summary":"","tags":null,"title":"Delivering and using 3D models on the web: are we ready? ","type":"publication"},{"authors":["Eliana Siotto","Gianpaolo Palma","Roberto Scopigno"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"1065ffa14205dfacf2d04b0c69cc185b","permalink":"http://vcg.isti.cnr.it/publication/2017/SPS17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/SPS17/","section":"publication","summary":"","tags":null,"title":"Development of the interactive system digital Loggia","type":"publication"},{"authors":["Marco Callieri","Nico Pietroni","Paolo Cignoni","Roberto Scopigno","Matteo Dellepiane"],"categories":null,"content":" ","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"5a97908ff51d633fdf1d66b61481fef8","permalink":"http://vcg.isti.cnr.it/publication/2017/SCPCD17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/SCPCD17/","section":"publication","summary":"Digital fabrication devices exploit basic technologies in order to create tangible reproductions of 3D digital models. Although current 3D printing pipelines still suffer from several restrictions, accuracy in reproduction has reached an excellent level. The manufacturing industry has been the main domain of 3D printing applications over the last decade. Digital fabrication techniques have also been demonstrated to be effective in many other contexts, including the consumer domain. The Cultural Heritage is one of the new application contexts and is an ideal domain to test the flexibility and quality of this new technology. This survey overviews the various fabrication technologies, discussing their strengths, limitations, and costs. Various successful uses of 3D printing in the Cultural Heritage are analysed, which should also be useful for other application contexts. We review works that have attempted to extend fabrication technologies in order to deal with the specific issues in the use of digital fabrication in the Cultural Heritage. Finally, we also propose areas for future research.","tags":null,"title":"Digital Fabrication Techniques for Cultural Heritage: A Survey","type":"publication"},{"authors":["Paolo Pingi","Eliana Siotto","Gianpaolo Palma","Roberto Scopigno"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"ca69517433a7d1aa33dc190a9dbb71c8","permalink":"http://vcg.isti.cnr.it/publication/2017/PSPS17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/PSPS17/","section":"publication","summary":"","tags":null,"title":"Documentazione e analisi delle deformazioni del supporto ligneo e della superficie pittorica mediante rilievo 3D","type":"publication"},{"authors":["Nico Schertler","Marco Tarini","Wenzel Jakob","Misha Kazhdan","Stefan Gumhold","Daniele Panozzo"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"9ed10398a4f29174d9fe33fa98e0d93a","permalink":"http://vcg.isti.cnr.it/publication/2017/STJKGP17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/STJKGP17/","section":"publication","summary":"","tags":null,"title":"Field-aligned online surface reconstruction","type":"publication"},{"authors":["Matteo Dellepiane","Marco Callieri","Francesco Banterle","Domenico Arenga","Massimo Zallocco","Roberto Scopigno"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"78aff160c0f052150b059604624c1b40","permalink":"http://vcg.isti.cnr.it/publication/2017/DCBAZS17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/DCBAZS17/","section":"publication","summary":"","tags":null,"title":"From Paper to Web: Automatic Generation of a Web-Accessible 3D Repository of Pottery Types","type":"publication"},{"authors":["Roberto Scopigno","Matteo Dellepiane"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"7e2850c7c15d2cbb2701bf3b74ef09eb","permalink":"http://vcg.isti.cnr.it/publication/2017/SD17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/SD17/","section":"publication","summary":"","tags":null,"title":"Integration and Analysis of Sampled Data: Visualization Approaches and Platforms","type":"publication"},{"authors":["Eliana Siotto"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"7fdfb2ef51d52adf5183e930b14afa7d","permalink":"http://vcg.isti.cnr.it/publication/2017/Sio17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/Sio17/","section":"publication","summary":"","tags":null,"title":"La policromia sui sarcofagi romani. Catalogo e risultati scientifici","type":"publication"},{"authors":["Giovanni Pintore","Fabio Ganovelli","Roberto Scopigno","Enrico Gobbetti"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"c0b03098b9206071d5c701cb7594c43b","permalink":"http://vcg.isti.cnr.it/publication/2017/PGSG17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/PGSG17/","section":"publication","summary":"","tags":null,"title":"Mobile metric capture and reconstruction in indoor environments","type":"publication"},{"authors":["Nico Pietroni","Marco Tarini","Amir Vaxman","Daniele Panozzo","Paolo Cignoni"],"categories":null,"content":" here\nhere\n","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"cc0f1a6e88b6c6ac86318ac0d0f10f6b","permalink":"http://vcg.isti.cnr.it/publication/2017/PTVPC17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/PTVPC17/","section":"publication","summary":"We propose a novel framework for the computational design of tensegrity structures, which are constructions made of struts and cables, held rigid by continuous tension between the elements. Tensegrities are known to be difficult to design---existing design methods are often restricted to using symmetric or templated configurations, limiting the design space to simple constructions. We introduce an algorithm to automatically create free-form stable tensegrity designs that satisfy both fabrication and geometric constraints, and faithfully approximate input geometric shapes. Our approach sidesteps the usual force-based approach in favor of a geometric optimization on the positions of the elements. Equipped with this formulation, we provide a design framework to explore the highly constrained space of tensegrity structures. We validate our method with simulations and real-world constructions. Click here download the slides. Click here download the data.","tags":null,"title":"Position-Based Tensegrity Design","type":"publication"},{"authors":["Cem Yuksel","Marco Tarini","Silvain Lefebvre"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"f57c9c589be93f21a4a582bc0c0daaa5","permalink":"http://vcg.isti.cnr.it/publication/2017/TYL17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/TYL17/","section":"publication","summary":"","tags":null,"title":"Rethinking texture mapping","type":"publication"},{"authors":["Xifeng Gao","Marco Tarini","Wenzel Jakob","Daniele Panozzo"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"73194cc5ec8a7fbe9e42033b037777f4","permalink":"http://vcg.isti.cnr.it/publication/2017/GTJP17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/GTJP17/","section":"publication","summary":"","tags":null,"title":"Robust hex-dominant mesh generation using field-guided polyhedral agglomeration","type":"publication"},{"authors":["Baptiste Angles","Marco Tarini","Brian Wyvill","Loic Barthe","Andrea Tagliasacchi"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"488c991641d65e4ccddc653a562acb14","permalink":"http://vcg.isti.cnr.it/publication/2017/ATWBT17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/ATWBT17/","section":"publication","summary":"","tags":null,"title":"Sketch-Based Implicit Blending","type":"publication"},{"authors":["Ruggero Pintus","Enrico Gobbetti","Marco Callieri","Matteo Dellepiane"],"categories":null,"content":"","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"996966027426ffef7f79ec52477df4ad","permalink":"http://vcg.isti.cnr.it/publication/2017/PGCD17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/PGCD17/","section":"publication","summary":"","tags":null,"title":"Techniques for Seamless Color Registration and Mapping on Dense 3D Models","type":"publication"},{"authors":["Gabriele Gattiglia","Tim Evans","Matteo Dellepiane","Francesco Banterle","Barak Itkin","Massimo Zallocco"],"categories":null,"content":" ","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"7fb2b0535e9c034b80e3b51f7a640e50","permalink":"http://vcg.isti.cnr.it/publication/2017/BDEGIZ17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/BDEGIZ17/","section":"publication","summary":" ","tags":null,"title":"The ArchAIDE Project: Results and Perspectives After the First Year","type":"publication"},{"authors":["Francesco Banterle","Barak Itkin","Matteo Dellepiane","Lior Wolf","Marco Callieri","Nachum Dershowitz","Roberto Scopigno"],"categories":null,"content":"source code\n","date":1483228800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1483228800,"objectID":"23269f0af5446b63302c6c6103638d68","permalink":"http://vcg.isti.cnr.it/publication/2017/BIDWCDS17/","publishdate":"2017-01-01T00:00:00Z","relpermalink":"/publication/2017/BIDWCDS17/","section":"publication","summary":"abstract\n\n\n\nAbstract We describe an automated pipeline for digitization of catolog drawings of pottery types. This work is aimed at extracting a structured description of the main geometric features and a 3D representation of each class. The pipeline includes methods for understanding a 2D drawing and using it for constructing a 3D model of the pottery. These will be used to populate a reference database for classification of potsherds. Furthermore, we extend the pipeline with methods for breaking the 3D model to obtain synthetic sherds and methods for capturing images of these sherds in a way that matches the imaging methodology of archaeologists. These will serve to build a massive set of synthetic sherd images that will help train and test future automated classification systems.\nsource code","tags":null,"title":"VASESKETCH: Automatic 3D Representation of Pottery from Paper Catolog Drawings","type":"publication"},{"authors":["Fabio Menna","Erika Nocerino","Fabio Remondino","Matteo Dellepiane","Marco Callieri","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"3e20b04696a0b318a96d81cd07c524e1","permalink":"http://vcg.isti.cnr.it/publication/2016/MNRDCS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/MNRDCS16/","section":"publication","summary":"","tags":null,"title":"3D Digitization of an Heritage Masterpiece - a Critical Analysis on Quality Assessment","type":"publication"},{"authors":["Elena Sikudova","Tania Pouli","Alessandro Artusi","Ahmet Oguz Akyuz","Francesco Banterle","Erik Reinhard","Zeynep Mazlumoglu"],"categories":null,"content":"Link\n","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"45ee1723068ef7928541b5cd93d8bcb1","permalink":"http://vcg.isti.cnr.it/publication/2016/SPAABRM16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/SPAABRM16/","section":"publication","summary":"Abstract An integrated gamut- and tone-management framework for color-accurate reproduction of high dynamic range images can prevent hue and luminance shifts while taking gamut boundaries into consideration. The proposed approach is conceptually and computationally simple, parameter-free, and compatible with existing tone-mapping operators. Link to the official publication.","tags":null,"title":"A Gamut Mapping Framework for Color-Accurate Reproduction of HDR Images","type":"publication"},{"authors":["Antonina Canzoneri","Gaia Pavoni","Marco Callieri","Matteo Dellepiane","Paolo Pingi","Manuela De Giorgi","Roberto Scopigno"],"categories":null,"content":" ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"f495e1b336184a95269aa22868edda66","permalink":"http://vcg.isti.cnr.it/publication/2016/CPCDPDS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/CPCDPDS16/","section":"publication","summary":" ","tags":null,"title":"A Virtual Experience Across the Buried History","type":"publication"},{"authors":["Dario Magri","Paolo Cignoni","Marco Tarini"],"categories":null,"content":" ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"a3f9daf6a891ae30ae90fb3b32a798c5","permalink":"http://vcg.isti.cnr.it/publication/2016/MCT16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/MCT16/","section":"publication","summary":" ","tags":null,"title":"Anisotropic MatCap: Easy Capture and Reproduction of Anisotropic Materials","type":"publication"},{"authors":["Maria Letizia Gualandi","Roberto Scopigno","Lior Wolf","Julian Richards","Jaume Buxeda i Garrigos","Michael Heinzelmann","Miguel Angel Hervas","Massimo Zallocco"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"b88f7140b45eef04795f9abfc8313d5f","permalink":"http://vcg.isti.cnr.it/publication/2016/GSWRBHHZ16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/GSWRBHHZ16/","section":"publication","summary":"","tags":null,"title":"ArchAIDE - Archaeological Automatic Interpretation and Documentation of cEramics","type":"publication"},{"authors":["Federico Ponchio","Marco Potenziani","Matteo Dellepiane","Marco Callieri","Roberto Scopigno"],"categories":null,"content":" ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"427e4fe37460af7c57415091f70e0e46","permalink":"http://vcg.isti.cnr.it/publication/2016/PPDCS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/PPDCS16/","section":"publication","summary":" ","tags":null,"title":"ARIADNE Visual Media Service: Easy Web Publishing of Advanced Visual Media","type":"publication"},{"authors":["Alexandre Ahmad","Olivier Balet","Arjen Boin","Julien Castet","Fabio Ganovelli","George Kokkinis","Giovanni Pintore"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"3ea2baa357af43b7e890ad5934db6102","permalink":"http://vcg.isti.cnr.it/publication/2016/ABBCGKP16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/ABBCGKP16/","section":"publication","summary":"This paper presents an innovative IT solution, a virtual studio, enabling security professionals to formulate, test and adjust security measures to enhance the security of critical buildings. The concept is to virtualize the environment, enabling experts to examine and assess and improve on a building's security in a cost-effective and risk-free way. Our virtual studio solution makes use of the latest advances in computer graphics to reconstruct accurate blueprints as well as 3D representations of entire buildings in a very short timeframe. In addition, our solution enables the creation and simulation of multiple threat situations, allowing users to assess security procedures and various responses. Furthermore, we present a novel device, tailored to support collaborative security planning needs. Security experts from various disciplines evaluated our virtual studio solution, and their analysis is presented in this paper.","tags":null,"title":"Assessing the Security of Buildings: A Virtual Studio Solution","type":"publication"},{"authors":["Gaia Pavoni","Matteo Dellepiane","Marco Callieri","Roberto Scopigno"],"categories":null,"content":" ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"2b99d02e282f2bc0676bf41029d65ca5","permalink":"http://vcg.isti.cnr.it/publication/2016/PDCS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/PDCS16/","section":"publication","summary":" ","tags":null,"title":"Automatic Selection of Video Frames for Path Regularization and 3D Reconstruction","type":"publication"},{"authors":["Marco Potenziani","Bernhard Fritsch","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"e677b3f5fc4e6f1f284f00d1cb017b6d","permalink":"http://vcg.isti.cnr.it/publication/2016/PFDS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/PFDS16/","section":"publication","summary":"Online publishing of almost every type of 3D data has become a quasi-standard routine. Nevertheless, the integration in a \tweb page of a single 3D model, or of a predefined restricted set of models, raises different issues compared to an efficient and \teffective integration of thousands of them in an online repository. In this case it is mandatory to have an automatized pipeline to \tprepare and homogenize the dataset. The pipeline should be able to automatically wrap 3D data in all conditions, and display \tevery single model with the best scene setup without any (or with a minimal) interaction by the database maintainers. \tThis paper, retracing the steps of a recent real application case, aims at showing all the faced issues (and the adopted solutions) \tto publish a large and heterogeneous three-dimensional dataset in a web specialized repository. We want to introduce a valid \tand reusable strategy, starting from the description of the pipeline adopted for data pre-processing and moving to the choices \tmade in the 3D viewer implementation. The paper concludes with a discussion on the actual state of the integration of 3D data \twith the other multimedia informative layers.","tags":null,"title":"Automating Large 3D Dataset Publication in a Web-Based Multimedia Repository","type":"publication"},{"authors":["Elena Corio","Francesco Laccone","Nico Pietroni","Paolo Cignoni","Maurizio Froli"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"5d9808da9f5aa02e2e435c2205418592","permalink":"http://vcg.isti.cnr.it/publication/2016/CLPCF16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/CLPCF16/","section":"publication","summary":"Reciprocal structures, or nexorade, are composed by the assembling of groups of three or more beams mutually connected by mono-lateral T joints in a way that any relative movement is suppressed. This kind of structures can be easily built in relatively unprepared sites, dismantled, transported and re-used even by not specialized handcraft. For these reasons, reciprocal structures have been widely used in the past for military purposes, and nowadays they seem to satisfy very well the different requirements of a quick and temporary shelter of a large archaeological area when they are shaped as grid shells. This paper proposes the design of a reversible, reciprocal framed grid shell to shelter the archaeological site of the Roman Shipwrecks in Pisa. The structure must protect excavations and archaeologists from the weather and provide an easy access to visitors. Additionally, it must allow for easy disassembling and moving to another site. The design choices aim at optimizing both structural efficiency and esthetical qualities. A parametric workflow for both the form finding and the digital fabrication processes has been developed, and a prototype of accommodative steel T-joint for timber reciprocal beams has been realized. Finally, a model using CNC- cutting tested the structural feasibility of such a design approach.","tags":null,"title":"Conception and parametric design workflow for a timber large-spanned reversible grid shell to shelter the archaeological site of the Roman Shipwrecks in Pisa","type":"publication"},{"authors":["Gabriele Salvati","Claudio Calabrese","Marco Tarini","Fabio Pellacini"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"f3efd0be7e232fb59fdfbf07b4f50e3a","permalink":"http://vcg.isti.cnr.it/publication/2016/CSTP16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/CSTP16/","section":"publication","summary":"Collaborative systems are well established solutions for sharing work among people. In computer graphics these workflows are still not well established, compared to what is done for text writing or software development. Usually artists work alone and share their final models by sending files. In this paper we present a system for collaborative 3D digital sculpting. In our prototype, multiple artists concurrently sculpt a polygonal mesh on their local machines by changing its vertex properties, such as positions and material BRDFs. Our system shares the artists' edits automatically and seamlessly merges these edits even when they happen on the same region of the surface. We propose a merge algorithm that is fast-enough for seamless collaboration, respects users' edits as much as possible, can support any sculpting operation, and works for both geometry and appearance modifications. Since in sculpting artists alternatively perform fine adjustments and large scale modifications, our algorithm is based on a multiresolution edit representation that handles concurrent overlapping edits at different scales. We tested our algorithm by modeling meshes collaboratively in different sculpting sessions and found that our algorithm outperforms prior works on collaborative mesh editing in all cases.","tags":null,"title":"cSculpt: A System for Collaborative Sculpting","type":"publication"},{"authors":["Davide Tonelli","Nico Pietroni","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"9a5af345861e3019ddf100a509a62186","permalink":"http://vcg.isti.cnr.it/publication/2016/TPCS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/TPCS16/","section":"publication","summary":"Statics Aware Voronoi Grid-shells have been recently introduced in the Architectural Geometry field. These are innovative grid- shells endowed with a polygonal topology, whose geometry is structurally optimized by means of a novel algorithm. Although being structurally effective and arguably aesthetically charming, so far these grid-shells have struggled to attract architects' interest. We propose a method to fabricate a mockup of the grid shell by using modern additive 3D printing and laser cutting technologies. We also show how the realised mockup can be used to perform a preliminary validation of the simulated static performances of the grid-shell structure.","tags":null,"title":"Design and Fabrication of Grid-shells Mockups","type":"publication"},{"authors":["Gianpaolo Palma","Paolo Cignoni","Tamy Boubekeur","Roberto Scopigno"],"categories":null,"content":" EG 2016 Slides ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"1d3096554a35d763d282b8b89e8bd6d8","permalink":"http://vcg.isti.cnr.it/publication/2016/PCBS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/PCBS16/","section":"publication","summary":"Detecting geometric changes between two 3D captures of the same location performed at different moments is a critical operation for all systems requiring a precise segmentation between change and no-change regions. Such application scenarios include 3D surface reconstruction, environment monitoring, natural events management and forensic science. Unfortunately, typical 3D scanning setups cannot provide any one-to-one mapping between measured samples in static regions: in particular, both extrinsic and intrinsic sensor parameters may vary over time while sensor noise and outliers additionally corrupt the data. In this paper, we adopt a multi-scale approach to robustly tackle these issues. Starting from two point clouds, we first remove outliers using a probabilistic operator. Then, we detect the actual change using the implicit surface defined by the point clouds under a Growing Least Square reconstruction that, compared to the classical proximity measure, offers a more robust change/no-change characterization near the temporal intersection of the scans and in the areas exhibiting different sampling density and direction. The resulting classification is enhanced with a spatial reasoning step to solve critical geometric configurations that are common in man-made environments. We validate our approach on a synthetic test case and on a collection of real data sets acquired using commodity hardware. Finally, we show how 3D reconstruction benefits from the resulting precise change/no-change segmentation. \t \t EG 2016 Slides","tags":null,"title":"Detection of Geometric Temporal Changes in Point Clouds","type":"publication"},{"authors":["Fabio Ganovelli","Giovanni Pintore","Valeria Garro","Enrico Gobbetti","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"d16daf8f604507f6cd1b615b8929409e","permalink":"http://vcg.isti.cnr.it/publication/2016/GPGGS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/GPGGS16/","section":"publication","summary":"We present a novel algorithm for fast metric reconstruction on mobile devices using a combination of image and inertial acceleration data. In contrast to previous approaches to this problem, our algorithm does not require a long acquisition time or intensive data processing and can be implemented entirely on common IMU-enabled tablet and smartphones. The method recovers real world units by comparing the acceleration values from the inertial sensors with the ones inferred from images. In order to cope with IMU signal noise, we propose a novel RANSAC-like strategy which helps to remove the outliers. We demonstrate the effectiveness and the accuracy of our method through an integrated mobile system returning point clouds in metric scale.","tags":null,"title":"Fast Metric Acquisition with Mobile Devices","type":"publication"},{"authors":["Luigi Malomo","Nico Pietroni","Bernd Bickel","Paolo Cignoni"],"categories":null,"content":"Siggraph slides (.key)\n","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"03228a16ad9e2b77aec9cb93317e93cd","permalink":"http://vcg.isti.cnr.it/publication/2016/MPBC16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/MPBC16/","section":"publication","summary":"We present FlexMolds, a novel computational approach to automatically design flexible, reusable molds that, once 3D printed, allow us to physically fabricate, by means of liquid casting, multiple copies of complex shapes with rich surface details and complex topology. The approach to design such flexible molds is based on a greedy bottom-up search of possible cuts over an object, evaluating for each possible cut the feasibility of the resulting mold. We use a dynamic simulation approach to evaluate candidate molds, providing a heuristic to generate forces that are able to open, detach, and remove a complex mold from the object it surrounds. We have tested the approach with a number of objects with nontrivial shapes and topologies. Siggraph slides (.key)","tags":null,"title":"FlexMolds: Automatic Design of Flexible Shells for Molding","type":"publication"},{"authors":["Wei Fan","Giuseppe Valenzise","Francesco Banterle","Frederic Dufaux"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"0b12ae7706add4f6d2f22044f1ae55da","permalink":"http://vcg.isti.cnr.it/publication/2016/FVBD16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/FVBD16/","section":"publication","summary":"","tags":null,"title":"Forensic detection of inverse tone mapping in HDR images ","type":"publication"},{"authors":["Luigi Malomo","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"1452b01d1586324a65d9da795678c768","permalink":"http://vcg.isti.cnr.it/publication/2016/MCS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/MCS16/","section":"publication","summary":"We present an efficient 3D interaction technique: generalizing the well known trackball approach, this technique unifies and blends the two common interaction mechanisms known as panning and orbiting. The approach allows to inspect a virtual object by navigating over its surrounding space, remaining at a chosen distance and performing an automatic panning over its surface. This generalized trackball allows an intuitive navigation of topologically complex shapes, enabling unexperienced users to visit hard-to-reach parts better and faster than with standard GUI components. The approach is based on the construction of multiple smooth approximations of the model under inspection; at rendering time, it constrains the camera to stay at a given distance to these approximations. The approach requires negligible preprocessing and memory overhead and works well for both mousebased and touch interfaces. An informal user study confirms the impact of the proposed technique.","tags":null,"title":"Generalized Trackball for Surfing Over Surfaces","type":"publication"},{"authors":["Tamy Boubekeur","Paolo Cignoni","Elmar Eisemann","Michael Goesele","Reinhard Klein","Stefan Roth","Michael Weinemann","Michael Wimmer"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"d0fbf9ae6cd77d7d1bafd8a6912fd8b1","permalink":"http://vcg.isti.cnr.it/publication/2016/BCEGKRWW16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/BCEGKRWW16/","section":"publication","summary":"","tags":null,"title":"Harvesting Dynamic 3DWorlds from Commodity Sensor Clouds","type":"publication"},{"authors":["Francesco Banterle","Jonas Unger"],"categories":null,"content":"Link\n","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"ecdde0c79d8f2639ca761dd01c523155","permalink":"http://vcg.isti.cnr.it/publication/2016/BU16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/BU16/","section":"publication","summary":"Abstract Capturing HDR videos is still a challenging task because HDR camera systems are either very costly (commercial systems) or have not matured enough to reach consumer markets (research prototypes). Recently, unofficial firmware for cameras has started to appear, and the firmware allows for reprogramming of the system to capture footage with an extended dynamic range. The dynamic range that can be captured in a single shot, however, is still limited and does not fully cover the dynamic range found in high-contrast scenes. There is, therefore, a need for low-cost techniques that allow for HDR-video capture using off-the-shelf equipment. This chapter describes methods for enhancing the standard dynamic range using previously captured HDR photographs of the same scene. Link to the official publication.","tags":null,"title":"High Dynamic Range Video: Concepts, Technologies and Applications","type":"publication"},{"authors":["Alessandro Artusi","Francesco Banterle","Tunc Aydin","Daniele Panozzo","Olga Sorkine-Hornung"],"categories":null,"content":"link to the official website\n","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"90e05971543847a44126c3ac26a5698c","permalink":"http://vcg.isti.cnr.it/publication/2016/ABAPS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/ABAPS16/","section":"publication","summary":"abstract\n\n\n\n\n\n\n\nlink to the official website\n\n\nTable of Contents In recent years visual devices have proliferated, from the massive high-resolution, high-contrast screens to the tiny ones on mobile phones, with their limited dynamic range and color gamut. The wide variety of screens on which content may be viewed creates a challenge for developers. Adapting visual content for optimized viewing on all devices is called retargeting. This is the first book to provide a holistic view of the subject, thoroughly reviewing and analyzing the many techniques that have been developed for retargeting along dimensions such as color gamut, dynamic range, and spatial resolution.\n\n\nThe book is divided in the following chapters:\nIntroduction (a brief introduction on light, human vision, and color spaces) Tone and Color Retargeting Color2Gray Example Based Transferring Spatial Retargeting Quality Assessment\n\nThe book provides a brief appendix on edge-preserving filters (i.e., bilateral filter, anisotropic diffusion, , etc.).","tags":null,"title":"Image Content Retargeting: Maintaining Color, Tone, and Spatial Consistency","type":"publication"},{"authors":["Eliana Siotto","Marco Callieri","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"71dd47a1809a483cd1be1581e4e7f5e1","permalink":"http://vcg.isti.cnr.it/publication/2016/SCDS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/SCDS16/","section":"publication","summary":" ","tags":null,"title":"MeshLab e Blender: software open source in supporto allo studio e alla ricostruzione virtuale della policromia antica","type":"publication"},{"authors":["Francesco Banterle","Alessandro Artusi","Elena Sikudova","Patrick Ledda","Thomas Edward William Bashford-Rogers","Alan Chalmers","Marina Bloj"],"categories":null,"content":"Link\nThe source code\n","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"98c8fefcae5530c8c9dba763feb69905","permalink":"http://vcg.isti.cnr.it/publication/2016/BASLBCB16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/BASLBCB16/","section":"publication","summary":"Abstract In this paper, we present a new technique for displaying High Dynamic Range (HDR) images on Low Dynamic Range (LDR) displays in an efficient way on the GPU. The described process has three stages. First, the input image is segmented into luminance zones. Second, the tone mapping operator (TMO) that performs better in each zone is automatically selected. Finally, the resulting tone mapping (TM) outputs for each zone are merged, generating the final LDR output image. To establish the TMO that performs better in each luminance zone we conducted a preliminary psychophysical experiment using a set of HDR images and six different TMOs. We validated our composite technique on several (new) HDR images and conducted a further psychophysical experiment, using an HDR display as the reference, that establishes the advantages of our hybrid three-stage approach over a traditional individual TMO. Finally, we present a GPU version, which is perceptually equal to the standard version but with much improved computational performance. Link to the official publication. The source code of this method is part of the HDR Toolbox and it is implemented in the function BanterleTMO.m.","tags":null,"title":"Mixing tone mapping operators on the GPU by differential zone mapping based on psychophysical experiments","type":"publication"},{"authors":["Giovanni Pintore","Fabio Ganovelli","Enrico Gobbetti","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"af92d51938cefa975e08bed7fdbdc443","permalink":"http://vcg.isti.cnr.it/publication/2016/PGGS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/PGGS16/","section":"publication","summary":"We present a technology to capture, reconstruct and explore multi-room indoor structures from panorama images generated with the aid of commodity mobile devices. Our approach is motivated by the need for fast and effective systems to simplify indoor data acquisition, as required in many real-world cases where mapping the structure is more important than capturing 3D details, such as the design of smart houses. We combine and extend state-of-the-art results to obtain indoor models scaled to their real-world metric dimension, making them available for online exploration. Moreover, since our target is to assist end-users not necessarily skilled in virtual reality and 3D objects interaction, we introduce a client-server image-based navigation system, exploiting this simplified indoor structure to support a low-degree-of-freedom user interface. We tested our approach in several indoor environments and carried out a preliminary user study to assess the usability of the system by people without a specific technical background.","tags":null,"title":"Mobile Mapping and Visualization of Indoor Structures to Simplify Scene Understanding and Location Awareness","type":"publication"},{"authors":["Giovanni Pintore","Fabio Ganovelli","Enrico Gobbetti","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"2f13b2154c2d2a227178635c0ad66ff7","permalink":"http://vcg.isti.cnr.it/publication/2016/PGGS16a/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/PGGS16a/","section":"publication","summary":"","tags":null,"title":"Mobile reconstruction and exploration of indoor structures exploiting omnidirectional images","type":"publication"},{"authors":["Manuele Sabbadin","Gianpaolo Palma","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"33343423c9c6c8bb663b666fb6505fb9","permalink":"http://vcg.isti.cnr.it/publication/2016/SPCS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/SPCS16/","section":"publication","summary":"","tags":null,"title":"Multi-View Ambient Occlusion for Enhancing Visualization of Raw Scanning Data","type":"publication"},{"authors":["Federico Ponchio","Matteo Dellepiane"],"categories":null,"content":" ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"45bef9bc4be8ad80e0184ec3ad8ea3a5","permalink":"http://vcg.isti.cnr.it/publication/2016/PD16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/PD16/","section":"publication","summary":" ","tags":null,"title":"Multiresolution and fast decompression for optimal web-based rendering","type":"publication"},{"authors":["Eliana Siotto"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"a78c4d1aa50f7cbd82a53308a10d8caa","permalink":"http://vcg.isti.cnr.it/publication/2016/Sio16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/Sio16/","section":"publication","summary":"","tags":null,"title":"Musealizzazione di un dipinto pompeiano: la Venere nella Conchiglia","type":"publication"},{"authors":["Giovanni Pintore","Valeria Garro","Fabio Ganovelli","Marco Agus","Enrico Gobbetti"],"categories":null,"content":" ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"7d714ab9fde6a77d1a73cb2a9a347ea4","permalink":"http://vcg.isti.cnr.it/publication/2016/PGGAG16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/PGGAG16/","section":"publication","summary":"We introduce a light-weight automatic method to quickly capture and recover 2.5D multi-room indoor environments scaled to real-world metric dimensions. To minimize the user effort required, we capture and analyze a single omnidirectional image per room using widely available mobile devices. Through a simple tracking of the user movements between rooms, we iterate the process to map and reconstruct entire floor plans. In order to infer 3D clues with a minimal processing and without relying on the presence of texture or detail, we define a specialized spatial transform based on catadioptric theory to highlight the room's structure in a virtual projection. From this information, we define a parametric model of each room to formalize our problem as a global optimization solved by Levenberg-Marquardt iterations. The effectiveness of the method is demonstrated on several challenging real-world multi-room indoor scenes.","tags":null,"title":"Omnidirectional Image Capture on Mobile Devices for Fast Automatic Generation of 2.5D Indoor Maps","type":"publication"},{"authors":["Damla Ezgi Akçora","Francesco Banterle","Massimiliano Corsini","Ahmet Oguz Akyuz","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"b5262df1441ea02da6d18df97a7dabdf","permalink":"http://vcg.isti.cnr.it/publication/2016/ABCAS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/ABCAS16/","section":"publication","summary":"Abstract We introduce a novel algorithm for obtaining High Dynamic Range (HDR) videos from Standard Dynamic Range (SDR) videos with varying shutter speed or ISO per frame. This capturing technique represents today one of the most popular HDR video acquisition methods, thanks to the availability and the low cost of the equipment required; i.e., an off-the-shelf DSLR camera. However, naïvely merging SDR frames into an HDR video can produce artifacts such as ghosts (when the scene is dynamic), and blurry edges (when the camera moves). In this work, we present a straightforward, easy to implement, and fast technique that produces reasonable results in a short time. This is key for having quick previews of the captured videos without waiting for a long processing time. This is extremely important, especially when capturing videos on modern mobile devices such as smartphones and/or tablets.","tags":null,"title":"Practical-HDR: A Simple and Effective Method for Merging High Dynamic Range Videos","type":"publication"},{"authors":["Andrea Baldacci","Fabio Ganovelli","Massimiliano Corsini","Roberto Scopigno"],"categories":null,"content":" ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"de07527cb53bf085d56769a25bb3a2f6","permalink":"http://vcg.isti.cnr.it/publication/2016/BGCS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/BGCS16/","section":"publication","summary":"Using synthetic videos to present a 3D scene is a common requirement for architects, designers, engineers or Cultural Heritage professionals however it is usually time consuming and, in order to obtain high quality results, the support of a film maker/computer animation expert is necessary. We introduce an alternative approach that takes the 3D scene of interest and an example video as input, and automatically produces a video of the input scene that resembles the given video example. In other words, our algorithm allows the user to 'replicate' an existing video, on a different 3D scene. We build on the intuition that a video sequence of a static environment is strongly characterized by its optical flow, or, in other words, that two videos are similar if their optical flows are similar. We therefore recast the problem as producing a video of the input scene whose optical flow is similar to the optical flow of the input video. Our intuition is supported by a user-study specifically designed to verify this statement. We have successfully tested our approach on several scenes and input videos, some of which are reported in the accompanying material of this paper.","tags":null,"title":"Presentation of 3D Scenes through Video Example","type":"publication"},{"authors":["Nicolas Mellado","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"99c8bc20efabfcf46dc3c386f023eb55","permalink":"http://vcg.isti.cnr.it/publication/2016/MDS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/MDS16/","section":"publication","summary":"","tags":null,"title":"Relative scale estimation and 3D registration of multi-modal geometry using Growing Least Squares","type":"publication"},{"authors":["Eliana Siotto","Clara Baracchini","Ulderico Santamaria","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"d50a0ee354f58dc60af3ce79400350e1","permalink":"http://vcg.isti.cnr.it/publication/2016/SBSS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/SBSS16/","section":"publication","summary":"","tags":null,"title":"Sperimentazione del Sistema Ministeriale SICaR w/b per la gestione e la consultazione informatizzata dei dati sulla policromia","type":"publication"},{"authors":["Davide Tonelli","Nico Pietroni","Enrico Puppo","Maurizio Froli","Paolo Cignoni","Gennaro Amendola","Roberto Scopigno"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"3b12315d34403e7b4344a89305528758","permalink":"http://vcg.isti.cnr.it/publication/2016/TPPFCAS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/TPPFCAS16/","section":"publication","summary":"Grid-shells are lightweight structures used to cover long spans with few load-bearing material, as they excel for lightness, elegance and transparency. In this paper we analyse the stability of hex-dominant free-form grid-shells, generated with the Statics Aware Voronoi Remeshing scheme introduced in Pietroni et al. (2015). This is a novel hex-dominant, organic-like and non uniform remeshing pattern that manages to take into account the statics of the underlying surface. We show how this pattern is particularly suitable for free-form grid-shells, providing good performance in terms of both aesthetics and structural behaviour. To reach this goal, we select a set of four con- temporary architectural surfaces and we establish a systematic comparative analysis between Statics Aware Voronoi Grid-Shells and equivalent state of the art triangular and quadrilateral grid-shells. For each dataset and for each grid-shell topology, imperfection sensitivity analyses are carried out and the worst response diagrams compared. It turns out that, in spite of the in- trinsic weakness of the hexagonal topology, free-form Statics Aware Voronoi Grid-Shells are much more effective than their state-of-the-art quadrilateral counterparts.","tags":null,"title":"Stability of Statics Aware Voronoi Grid-Shells","type":"publication"},{"authors":["Karina Rodriguez Echavarria","Asla Medeiros e Sá","Nico Pietroni","Paolo Cignoni"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"9ea6135f8375a4562f328882506ed719","permalink":"http://vcg.isti.cnr.it/publication/2016/MRPC16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/MRPC16/","section":"publication","summary":"Digital fabrication technologies are becoming of importance to a number of knowledge areas and sectors, including medicine, entertainment, design, engineering, education, arts and architecture, due to their accessibility and versatility. These technolo- gies are changing the design of digital models, materials and manufacturing processes which enable to build previously un- achievable physical objects. Since many constraints imposed on the design of objects have changed significantly, a growing research community is working on graphical tools and techniques to enable the conception, automation, production and usage of innovative and complex designs for fabrication. In the present work, we survey the state of the art of computer graphics contributions to functional fabrication design tools and techniques. By functional fabrication we understand the design and manufacture of physical objects which functionalities exploit the capabilities of digital fabrication technologies. These func- tionalities include improving the mechanics of a workpiece, producing articulated models, capturing aerodynamics, planning deformable workpieces and controlling the object's appearance and acoustics. The resulting design tools are clearly taking advantage of relevant computer graphics techniques. Furthermore, they are extending these techniques to realise new physical forms as well as bringing innovation to feed into the design space.","tags":null,"title":"State Of The Art on Functional Fabrication","type":"publication"},{"authors":["Marion Lamé","Federico Ponchio","Ivan Radman-Livaja","Bruce Robertson"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"2fa7f5341aa3b9e416b59bed523200d7","permalink":"http://vcg.isti.cnr.it/publication/2016/LPRR16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/LPRR16/","section":"publication","summary":"","tags":null,"title":"Teaching (Digital) Epigraphy","type":"publication"},{"authors":["Rafal Mantiuk","Gabriel Eilertsen","Francesco Banterle","Jonas Unger"],"categories":null,"content":"","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"e8ef9a24bc7f5719b4f6a3c265b52912","permalink":"http://vcg.isti.cnr.it/publication/2016/UBEM16a/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/UBEM16a/","section":"publication","summary":"abstract\n\n\n\n\n\n\n\n\nAbstract High dynamic range (HDR) video technology has gone through remarkable developments over the last few years; HDR-video cameras are being commercialized, new algorithms for color grading and tone mapping specifically designed for HDR-video have recently been proposed, and the first open source compression algorithms for HDR-video are becoming available. HDR-video represents a paradigm shift in imaging and computer graphics, which has and will continue to generate a range of both new research challenges and applications. This intermediate-level tutorial will give an in-depth overview of the full HDR-video pipeline present several examples of state-of-the-art algorithms and technology in HDR-video capture, tone mapping, compression and specific applications in computer graphics.","tags":null,"title":"The HDR-video pipeline","type":"publication"},{"authors":["Nico Pietroni","Enrico Puppo","Giorgio Marcias","Roberto Scopigno","Paolo Cignoni"],"categories":null,"content":" Pacific Graphics 2016 Slides Data ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"4b1cfee9ede86b4736db1a3c945a0151","permalink":"http://vcg.isti.cnr.it/publication/2016/PPMSC16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/PPMSC16/","section":"publication","summary":"Given a cross field over a triangulated surface we present a practical and robust method to compute a field aligned coarse quad layout over the surface. The method works directly on a triangle mesh without requiring any parametrization and it is based on a new technique for tracing field-coherent geodesic paths directly on a triangle mesh, and on a new relaxed formulation of a binary LP problem, which allows us to extract both conforming quad layouts and coarser layouts containing t-junctions. Our method is easy to implement, very robust, and, being directly based on the input cross field, it is able to generate better aligned layouts, even with complicated fields containing many singularities. We show results on a number of datasets and comparisons with state-of-the-art methods. Pacific Graphics 2016 Slides Data","tags":null,"title":"Tracing Field-Coherent Quad Layouts","type":"publication"},{"authors":["Marco Tarini"],"categories":null,"content":" Project page (with demo, sources, etc). ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"dab2fbed2f6ce4d5a7761c45d6106092","permalink":"http://vcg.isti.cnr.it/publication/2016/Tar16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/Tar16/","section":"publication","summary":"UV-maps are required in order to apply a 2D texture over a 3D model.Conventional UV-maps are defined by an assignment of uv positions to mesh vertices. We present an alternative representation, volume-encoded UV-maps, in which each point on the surface is mapped to a uv position which is solely a function of its 3D position. This function is tailored for a target surface: its restriction to the surface is a parametrization exhibiting high quality, e.g. in terms of angle and area preservation; and, near the surface, it is almost constant for small orthogonal displacements.The representation is applicable to a wide range of shapes and UV-maps, and unlocks several key advantages: it removes the need to duplicate vertices in the mesh to encode cuts in the map; it makes the UV-map representation independent from the meshing of the surface; the same texture, and even the same UV-map, can be shared by multiple geometrically similar models (e.g.alllevelsofa LoDpyramid); UV-maps can be applied to representations other than polygonal meshes, like point clouds or set of registered range-maps.Our schema is cheap on GPU computational and memory resources, requiring only a single, cache-coherent indirection to a small volumetric texture per fragment.We also provide an algorithm to construct a volume-encoded UV-map given a target surface. \t Project page (with demo, sources, etc).","tags":null,"title":"Volume-encoded UV-maps","type":"publication"},{"authors":["Fabrizio Galeazzi","Marco Callieri","Matteo Dellepiane","Michael Charmo","Julian Richards","Roberto Scopigno"],"categories":null,"content":" ","date":1451606400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1451606400,"objectID":"4db6c93fae6c4dafc72041fb080d87c7","permalink":"http://vcg.isti.cnr.it/publication/2016/GCDCRS16/","publishdate":"2016-01-01T00:00:00Z","relpermalink":"/publication/2016/GCDCRS16/","section":"publication","summary":" ","tags":null,"title":"Web-based visualization for 3D data in archaeology: The ADS 3D viewer","type":"publication"},{"authors":["Andrea Baldacci","Daniele Bernabei","Fabio Ganovelli","Massimiliano Corsini","Roberto Scopigno"],"categories":null,"content":" ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"628ed99728c36374db7654f318d2c940","permalink":"http://vcg.isti.cnr.it/publication/2015/BBGCS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/BBGCS15/","section":"publication","summary":"We present a novel interactive framework for improving 3D reconstruction starting from incomplete or noisy results obtained through image-based reconstruction algorithms. The core idea is to enable the user to provide localized hints on the curvature of the surface, which are turned into constraints during an energy minimization reconstruction. To make this task simple we propose two algorithms. The first is a multi-view segmentation algorithm that allows the user to propagate the foreground selection of one or more images both to all the images of the input set and to the 3D points, in order to accurately select the part of the scene to be reconstructed. The second is a fast GPU-based algorithm for the reconstruction of smooth surfaces from multiple views, which incorporates the hints provided by the user. We show that our framework can turn a poor quality reconstruction produced with state-ofthe-art image-based reconstruction methods into a high quality one.","tags":null,"title":"3D Reconstruction for Featurless Scenes with Curvature Hints","type":"publication"},{"authors":["Marco Potenziani","Marco Callieri","Matteo Dellepiane","Massimiliano Corsini","Federico Ponchio","Roberto Scopigno"],"categories":null,"content":" ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"7a6f600051656d5a49388173891608b4","permalink":"http://vcg.isti.cnr.it/publication/2015/PCDCPS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/PCDCPS15/","section":"publication","summary":" ","tags":null,"title":"3DHOP: 3D Heritage Online Presenter","type":"publication"},{"authors":["Roberto Scopigno","Marco Callieri","Matteo Dellepiane","Eliana Siotto","Corrado Gratziu","Alessandra Moscato","Lucia Burgio","Stefano Legnaioli","Giulia Lorenzetti","Vincenzo Palleschi"],"categories":null,"content":"","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"2e47193bfdf8ed320adb223b189ab838","permalink":"http://vcg.isti.cnr.it/publication/2015/SDCSGMBLLP15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/SDCSGMBLLP15/","section":"publication","summary":"","tags":null,"title":"A multidisciplinary approach for the study and the virtual reconstruction of the ancient polychromy of Roman sarcophagi","type":"publication"},{"authors":["Marco Callieri","Paolo Pingi","Marco Potenziani","Matteo Dellepiane","Gaia Pavoni","Aurelia Lureau","Roberto Scopigno"],"categories":null,"content":" ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"d4ea799fb13a1e4e30222029530eda3e","permalink":"http://vcg.isti.cnr.it/publication/2015/CPPDPLS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/CPPDPLS15/","section":"publication","summary":" ","tags":null,"title":"Alchemy in 3D – A Digitization for a Journey Through Matter","type":"publication"},{"authors":["Eliana Siotto","Marco Callieri","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":"","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"5b0b9547a556e1dfa674df27f0360c38","permalink":"http://vcg.isti.cnr.it/publication/2015/SCDS15a/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/SCDS15a/","section":"publication","summary":"","tags":null,"title":"Ancient polychromy: study and virtual reconstruction using open source tools","type":"publication"},{"authors":["Rosario Aiello","Francesco Banterle","Nico Pietroni","Luigi Malomo","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" Iciap presentation ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"157ef14c17ebb8fbcf3a4deeb0ee2df6","permalink":"http://vcg.isti.cnr.it/publication/2015/ABPMCS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/ABPMCS15/","section":"publication","summary":"In this paper, we propose a novel method for accelerating the computation of geodesic distances over arbitrary manifold triangulated surfaces. The method is based on a preprocessing step where we build a data structure. This allows to store arbitrary complex distance metrics. We show that, by exploiting the precomputed data, the proposed method is significantly faster than the classical Dijkstra algorithm for the com- putation of point to point distances. Moreover, as we precompute exact geodesic distances, the proposed approach can be more accurate than state-of-the-art approximations. Iciap presentation","tags":null,"title":"Compression and Querying of Arbitrary Geodesic Distances","type":"publication"},{"authors":["Giorgio Marcias","Kenshi Takayama","Nico Pietroni","Daniele Panozzo","Olga Sorkine","Enrico Puppo","Paolo Cignoni"],"categories":null,"content":" Siggraph presentation Code (GUI for retopology - SketchRetopo) Code (learning patches) Some quadrangulated meshes A video Showing comparison with previous methods A database of learned patches ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"4e88556819ad5f6c44af7c67c6bab06d","permalink":"http://vcg.isti.cnr.it/publication/2015/MTPPSPC15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/MTPPSPC15/","section":"publication","summary":"We propose an interactive quadrangulation method based on a large collection of patterns that are learned from models manually designed by artists. The patterns are distilled into compact quadrangulation rules and stored in a database. At run-time, the user draws strokes to define patches and desired edge flows, and the system queries the database to extract fitting patterns to tessellate the sketches' interiors. The quadrangulation patterns are general and can be applied to tessellate large regions while controlling the positions of the singularities and the edge flow. We demonstrate the effectiveness of our algorithm through a series of live retopology sessions and an informal user study with three professional artists. Siggraph presentation Code (GUI for retopology - SketchRetopo) Code (learning patches) Some quadrangulated meshes A video Showing comparison with previous methods A database of learned patches","tags":null,"title":"Data-Driven Interactive Quadrangulation","type":"publication"},{"authors":["Eliana Siotto","Gianpaolo Palma","Marco Potenziani","Roberto Scopigno"],"categories":null,"content":" ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"b9db629fe8265ddef73228d5f1b3b668","permalink":"http://vcg.isti.cnr.it/publication/2015/SPPS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/SPPS15/","section":"publication","summary":" ","tags":null,"title":"Digital Study and Web - based Documentation of the Colour and Gilding on Ancient Marble Artworks","type":"publication"},{"authors":["Luigi Malomo","Francesco Banterle","Paolo Pingi","Marco Callieri","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":"VirtualTour\n","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"534ab435718e4482cc8b123f6789be38","permalink":"http://vcg.isti.cnr.it/publication/2015/MBPCDS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/MBPCDS15/","section":"publication","summary":"abstract\n\n\n\n\n\nAbstract A very large number of sites, probably the large majority of our Cultural Heritage (CH), are unaccessible to the public due to the lack of infrastructure, improper security conditions or lack of personnel. Digitizing in 3D those sites is not very complicated nowadays. We will briefly review the technology available for cheap 3D digitization, from 3D scanning to cheaper photogrammetric solutions. However, digitization per se is not a solution: 3D models have to be shared in the widest and easiest manner. We will present the design and results of a software instrument that aims at supporting easy navigation of 3D digitized spaces, running on top of mobile devices such as tablets or smartphones. The main goal of this project is to guarantee navigation with ease for users without experience in computer graphics and videogames, while providing high-fidelity rendering of the digital 3D model.\n\n\nMore details please have a look to the official VirtualTour webpage.","tags":null,"title":"Digitizing and navigating unaccessible archaeological sites on mobile devices","type":"publication"},{"authors":["Emin Zerman","Giuseppe Valenzise","Francesca De Simone","Francesco Banterle","Frederic Dufaux"],"categories":null,"content":"","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"91e474eeaa74ddbdf7f99dd350b96212","permalink":"http://vcg.isti.cnr.it/publication/2015/ZVDBD15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/ZVDBD15/","section":"publication","summary":"abstract\n\n\n\n\n\nAbstract High dynamic range (HDR) displays use local backlight modulation to produce both high brightness levels and large contrast ratios. Thus, the display rendering algorithm and its parameters may greatly affect HDR visual experience. In this paper, we analyze the impact of display rendering on perceived quality for a specific display (SIM2 HDR47) and for a popular application scenario, i.e., HDR image compression. To this end, we assess whether significant differences exist between subjective quality of compressed images, when these are displayed using either the built-in rendering of the display, or a rendering algorithm developed by ourselves. As a second contribution of this paper, we investigate whether the possibility to estimate the true pixel-wise luminance emitted by the display, offered by our rendering approach, can improve the performance of HDR objective quality metrics that require true pixel-wise luminance as input. © (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.","tags":null,"title":"Effects of display rendering on HDR image quality assessment ","type":"publication"},{"authors":["Julian Panetta","Qingnan Zhou","Luigi Malomo","Nico Pietroni","Paolo Cignoni","Denis Zorin"],"categories":null,"content":" Some of the tested patterns Siggraph presentation ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"6786eacc30e25fa827193dcaccc38c68","permalink":"http://vcg.isti.cnr.it/publication/2015/PZMPCZ15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/PZMPCZ15/","section":"publication","summary":"We introduce elastic textures: a set of parametric, tileable, printable, cubic patterns achieving a broad range of elastic material properties: the softest pattern is over a thousand times softer than the stiffest, and the Poisson ratios range from below zero to nearly 0.5. Using a combinatorial search over topologies followed by shape optimization, we explore a wide space of wireframe-like, symmetric 3D patterns to obtain a small family. This pattern family can be printed without internal support structure on a single-material 3D printer and can be used to fabricate objects with prescribed mechanical behavior. The family can be extended easily to create families of anisotropic patterns with target orthotropic properties. We demonstrate that our elastic textures are able to achieve a user-supplied variable distribution of material properties. We also present a material optimization algorithm to choose material prop- erties at each point within an object to best fit a target deformation under a prescribed load. We show that, by fabricating these spatially varying materials with elastic textures, the desired behavior is achieved by the printed object. Some of the tested patterns Siggraph presentation","tags":null,"title":"Elastic Textures for Additive Fabrication","type":"publication"},{"authors":["Nicolo Dell Unto","Anne-Marie Leander","Giacomo Landeschi","Matteo Dellepiane","Marco Callieri","Daniele Ferdani"],"categories":null,"content":" ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"a508580fa6bdaa3b416565196e6a1130","permalink":"http://vcg.isti.cnr.it/publication/2015/DLLDCF15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/DLLDCF15/","section":"publication","summary":" ","tags":null,"title":"Experiencing Ancient Buildings from a 3D GIS Perspective: a Case Drawn from the Swedish Pompeii Project","type":"publication"},{"authors":["Francesco Usai","Marco Livesu","Enrico Puppo","Marco Tarini","Riccardo Scateni"],"categories":null,"content":" Data Available Here.\nVideo (youtube).\n","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"d346bfe15aee3827fe603bcad9b7f7b0","permalink":"http://vcg.isti.cnr.it/publication/2015/ULPTS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/ULPTS15/","section":"publication","summary":"Starting from the triangle mesh of a digital shape, mainly an articulated object, we produce a coarse quad layout that can be used in character modeling and animation. Our quad layout follows the intrinsic object structure described by its curve skeleton; it contains few irregular vertices of low degree; it can be immediately refined into a semi-regular quad mesh; it provides a structured domain for UV-mapping and parametrization. Our method is fast, one-click and it does not require any parameter setting. The user can steer and refine the process through simple interactive tools during the construction of the quad layout. Data Available Here. Video (youtube).","tags":null,"title":"Extraction of the Quad Layout of a Triangle Mesh Guided by its Curve-Skeleton","type":"publication"},{"authors":["Paolo Pingi","Massimiliano Corsini","Fabio Ganovelli","Roberto Scopigno"],"categories":null,"content":"","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"8bad5198cb3ea28c3d079f3d36919e90","permalink":"http://vcg.isti.cnr.it/publication/2015/PCGS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/PCGS15/","section":"publication","summary":"","tags":null,"title":"Fast and Simple Automatic Alignment of Large Sets of Range Maps ","type":"publication"},{"authors":["Federico Ponchio","Matteo Dellepiane"],"categories":null,"content":" ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"bace96d1a70396c7c791a4807a91e4e6","permalink":"http://vcg.isti.cnr.it/publication/2015/PD15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/PD15/","section":"publication","summary":" ","tags":null,"title":"Fast decompression for web-based view-dependent 3D rendering","type":"publication"},{"authors":["Olga Sorkine-Hornung","Daniele Panozzo","Marco Tarini","Wenzel Jakob"],"categories":null,"content":" Code and executables on gitHub!\n","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"7dce2e918e1ae8fb82682e165f9b6192","permalink":"http://vcg.isti.cnr.it/publication/2015/JTPS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/JTPS15/","section":"publication","summary":"We present a novel approach to remesh a surface into an isotropic triangular or quad-dominant mesh using a unified local smoothing operator that optimizes both the edge orientations and vertex positions in the output mesh. Our algorithm produces meshes with high isotropy while naturally aligning and snapping edges to sharp features. The method is simple to implement and parallelize, and it can process a variety of input surface representations, such as point clouds, range scans and triangle meshes. Our full pipeline executes instantly (less than a second) on meshes with hundreds of thousands of faces, enabling new types of interactive workflows. Since our algorithm avoids any global optimization, and its key steps scale linearly with input size, we are able to process extremely large meshes and point clouds, with sizes exceeding several hundred million elements. To demonstrate the robustness and effectiveness of our method, we apply it to hundreds of models of varying complexity and provide our cross-platform reference implementation in the supplemental material. Code and executables on gitHub!","tags":null,"title":"Instant Field-aligned Meshes","type":"publication"},{"authors":["Paolo Pingi","Luigi Malomo","Franco Alberto Cardillo","Francesco Banterle","Francesco Gabellone","Giuseppe Amato"],"categories":null,"content":" LecceAR\n","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"c5fe095f9fb0e9b316eb55159677e4c3","permalink":"http://vcg.isti.cnr.it/publication/2015/BCMPGA15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/BCMPGA15/","section":"publication","summary":"abstract\n\n\n\n\n\nAbstract This paper discusses a case study on the use of augmented reality (AR) within the context of cultural heritage. We implemented an iOS app for markerless AR that will be exhibited at the MUST museum in Lecce, Italy. The app shows a rich 3D reconstruction of the Roman amphitheater, which is nowadays only partially visible. The use of state-of-the-art algorithms in computer graphics and computer vision allows the viewing and the exploration of the ancient theater in real-time.\n\n\nMore details please have a look to the official LecceAR webpage.","tags":null,"title":"LecceAR: An Augmented Reality App","type":"publication"},{"authors":["Francesco Banterle","Franco Alberto Cardillo","Luigi Malomo"],"categories":null,"content":" LecceAR\n","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"c79befb62c03f15bd6ff6e0bd8b01e18","permalink":"http://vcg.isti.cnr.it/publication/2015/BCM15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/BCM15/","section":"publication","summary":"abstract\n\n\n\n\n\nAbstract Augmented Reality (AR) - the augmentation of a physical world's view with digital media - has recently gained popularity thanks to the increasing computational power and diffusion of mobile devices such as tablets, and smartphones. These developments allow many practical applications of AR technology, especially in the cultural heritage domain. LecceAR is an advanced app that allows tourists to view rich 3D reconstructions of cultural heritage sites within the city of Lecce in Italy. LecceAR is an iOS app for markerless AR that will be exhibited at the MUST museum in Lecce, Italy. The app shows a rich 3D reconstruction of the Lecce Roman amphitheatre, which is only partially unearthed (see Figure 1). The use of state-of-the-art algorithms in computer graphics and computer vision allows an ancient theatre to be viewed and explored in real-time.\n\n\nMore details please have a look to the official LecceAR webpage.","tags":null,"title":"LecceAR: An Augmented Reality App for Cultural Heritage ","type":"publication"},{"authors":["Paolo Cignoni","Nico Pietroni","Luigi Malomo","Roberto Scopigno"],"categories":null,"content":"","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"2996e1403b638cba9e371c24194d3fdf","permalink":"http://vcg.isti.cnr.it/publication/2015/CPMS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/CPMS15/","section":"publication","summary":"","tags":null,"title":"Mesh Joinery: A Method for Building Fabricable Structures","type":"publication"},{"authors":["Joel Kronander","Francesco Banterle","Andrew Gardner","Ehsan Miandji","Jonas Unger"],"categories":null,"content":"","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"9cfef0308d8761bc2dbed81029bfe5a6","permalink":"http://vcg.isti.cnr.it/publication/2015/KBGMU15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/KBGMU15/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstractPhoto-realistic rendering of virtual objects into real scenes is one of the most important research problems in computer graphics. Methods for capture and rendering of mixed reality scenes are driven by a large number of applications, ranging from augmented reality to visual effects and product visualization. Recent developments in computer graphics, computer vision, and imaging technology have enabled a wide range of new mixed reality techniques including methods of advanced image based lighting, capturing spatially varying lighting conditions, and algorithms for seamlessly rendering virtual objects directly into photographs without explicit measurements of the scene lighting. This report gives an overview of the state-of-the-art in this field, and presents a categorization and comparison of current methods. Our in-depth survey provides a tool for understanding the advantages and disadvantages of each method, and gives an overview of which technique is best suited to a specific problem.","tags":null,"title":"Photorealistic rendering of mixed reality scenes","type":"publication"},{"authors":["Marco Livesu","Alla Sheffer","Nicholas Vining","Marco Tarini"],"categories":null,"content":"[ project page ]\n[ Video ] ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"dfb1bf27cb2b3441534c831b574604e2","permalink":"http://vcg.isti.cnr.it/publication/2015/LSVT15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/LSVT15/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstractThe usability of hexahedral meshes depends on the degree to which the shape of their elements deviates from a perfect cube; a single concave, or inverted element makes a mesh unusable. While a range of methods exist for discretizing 3D objects with an initial topologically suitable hex mesh, their output meshes frequently contain poorly shaped and even inverted elements, requiring a further quality optimization step. We introduce a novel framework for optimizing hex-mesh quality capable of generating inversion-free high-quality meshes from such poor initial inputs. We recast hex quality improvement as an optimization of the shape of overlapping cones, or unions, of tetrahedra surrounding every directed edge in the hex mesh, and show the two to be equivalent. We then formulate cone shape optimization as a sequence of convex quadratic optimization problems, where hex convexity is encoded via simple linear inequality constraints. As this solution space may be empty, we therefore present an alternate formulation which allows the solver to proceed even when constraints cannot be satisfied exactly. We iteratively improve mesh element quality by solving at each step a set of local, per-cone, convex constrained optimization problems, followed by a global energy minimization step which reconciles these local solutions. This latter method provides no theoretical guarantees on the solution but produces inversion-free, high quality meshes in practice. We demonstrate the robustness of our framework by optimizing numerous poor quality input meshes generated using a variety of initial meshing methods and producing high-quality inversion-free meshes in each case. We further validate our algorithm by comparing it against previous work, and demonstrate a significant improvement in both worst and average element quality.\n\n[ project page ] [ Video ]","tags":null,"title":"Practical Hex-Mesh Optimization via Edge-Cone Rectification","type":"publication"},{"authors":["Marco Callieri","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"a36fee7d72312a985c48e5768402e0ae","permalink":"http://vcg.isti.cnr.it/publication/2015/CDS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/CDS15/","section":"publication","summary":" ","tags":null,"title":"Remote visualization and navigation of 3D models of archeological sites","type":"publication"},{"authors":["Silvia Biasotti","Andrea Cerri","Masaki Aono","A. Ben Hamza","Valeria Garro","Andrea Giachetti","Daniela Giorgi","Afzal A. Godil","Gary C. Li","C. Sanada","Michela Spagnuolo","Atsushi Tatsuma","Santiago Velasco Forero"],"categories":null,"content":"","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"7f04f2bcd339ec18d7960b8f6b7431a2","permalink":"http://vcg.isti.cnr.it/publication/2015/BCAHGGGGLSSTV15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/BCAHGGGGLSSTV15/","section":"publication","summary":"","tags":null,"title":"Retrieval and classification methods for textured 3D models: a comparative study","type":"publication"},{"authors":["Valeria Garro","Andrea Giachetti"],"categories":null,"content":"","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"566094a096377d475f6851b297936634","permalink":"http://vcg.isti.cnr.it/publication/2015/GG15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/GG15/","section":"publication","summary":"","tags":null,"title":"Scale space graph representation and kernel matching for non rigid and textured 3D shape retrieval","type":"publication"},{"authors":["Nico Pietroni","Davide Tonelli","Enrico Puppo","Maurizio Froli","Roberto Scopigno","Paolo Cignoni"],"categories":null,"content":" Talk Slides Downloadable Data ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"0e124e7e3f04cda7ac03e7640ebe1324","permalink":"http://vcg.isti.cnr.it/publication/2015/PTPFSC15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/PTPFSC15/","section":"publication","summary":"We introduce a framework for the generation of polygonal grid-shell architectural structures, whose topology is designed in order to excel in static performances. We start from the analysis of stress on the input surface and we use the resulting tensor field to induce an anisotropic non-Euclidean metric over it. This metric is derived by studying the relation between the stress tensor over a continuous shell and the optimal shape of polygons in a corresponding grid-shell. Polygonal meshes with uniform density and isotropic cells under this metric exhibit variable density and anisotropy in Euclidean space, thus achieving a better distribution of the strain energy over their elements. Meshes are further optimized taking into account symmetry and regularity of cells to improve aesthetics. We experiment with quad meshes and hex-dominant meshes, demonstrating that our grid-shells achieve better static performances than state-of-the-art grid-shells. Talk Slides Downloadable Data","tags":null,"title":"Statics Aware Grid Shells","type":"publication"},{"authors":["Daniele Panozzo","Olga Diamanti","Sylvain Paris","Marco Tarini","Evgeni Sorkine","Olga Sorkine-Hornung"],"categories":null,"content":" ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"732d3f91f3eda4016e120509fec5e359","permalink":"http://vcg.isti.cnr.it/publication/2015/PDPTSS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/PDPTSS15/","section":"publication","summary":"In the digital world, assigning arbitrary colors to an object is a simple operation thanks to texture mapping. However, in the real world, the same basic function of applying colors onto an object is far from trivial. One can specify colors during the fabrication process using a color 3D printer, but this does not apply to already existing objects. Paint and decals can be used during post-fabrication, but they are challenging to apply on complex shapes. In this paper, we develop a method to enable texture mapping of physical objects, that is, we allow one to map an arbitrary color image onto a three-dimensional object. Our approach builds upon hydrographics, a technique to transfer pigments printed on a sheet of polymer onto curved surfaces. We first describe a setup that makes the traditional water transfer printing process more accurate and consistent across prints. We then simulate the transfer process using a specialized parameterization to estimate the mapping between the planar color map and the object surface. We demonstrate that our approach enables the application of detailed color maps onto complex shapes such as 3D models of faces and anatomical casts.","tags":null,"title":"Texture Mapping Real-World Objects with Hydrographics ","type":"publication"},{"authors":["Chiara Leoni","Marco Callieri","Matteo Dellepiane","Daniel O Donnell","Roberto Rosselli Del Turco","Roberto Scopigno"],"categories":null,"content":" ","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"42441df376570f7a61dedf8bee7ce521","permalink":"http://vcg.isti.cnr.it/publication/2015/LCDORS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/LCDORS15/","section":"publication","summary":" ","tags":null,"title":"The Dream and the Cross: A 3D Scanning Project to Bring 3D Content in a Digital Edition","type":"publication"},{"authors":["Luigi Malomo","Francesco Banterle","Paolo Pingi","Francesco Gabellone","Roberto Scopigno"],"categories":null,"content":" VirtualTour\n","date":1420070400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1420070400,"objectID":"87e563155d00d4408919e2fae023ca4f","permalink":"http://vcg.isti.cnr.it/publication/2015/MBPGS15/","publishdate":"2015-01-01T00:00:00Z","relpermalink":"/publication/2015/MBPGS15/","section":"publication","summary":"abstract\n\n\n\n\n\nAbstract In the last few years, mobile or wearable virtual reality has gained new interest amongst the industry and researchers. The rapid development of new technologies such as high quality head mounted displays, accurate and cheap motion sensors (e.g. accelerometers, gyroscopes, depth cameras, etc.), localization sensors (e.g. GPS, compass, etc.) etc. have led to new opportunities that just a few years ago were not possible to achieve with off-the-shelf components. This renaissance of virtual reality is happening in both research and practical applications, such as computer games, movies, documentaries, learning, urban planning, etc. In this work we propose a system, VirtualTour, offering virtual exploration of Cultural Heritage (CH) sites on mobile devices based on a natural interaction approach; a few easy to understand (and to be tracked) actions performed by the user in the real world are translated into navigation instructions in the virtual world. To achieve this goal, we have exploited embedded sensors and the fast hardware of modern mobile devices.\n\nMore details please have a look to the official VirtualTour webpage.","tags":null,"title":"VirtualTour: A System for Exploring Cultural Heritage Sites in an Immersive Way","type":"publication"},{"authors":["Marco Potenziani","Marco Callieri","Roberto Scopigno"],"categories":null,"content":" ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"6cb2d8afa131dbcd7313657b8a5f8855","permalink":"http://vcg.isti.cnr.it/publication/2014/PCS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/PCS14/","section":"publication","summary":" ","tags":null,"title":"3DHOP: A Novel Technological Solution for the Development of Online Virtual Museums ","type":"publication"},{"authors":["Marco Tarini","Daniele Panozzo","Olga Sorkine"],"categories":null,"content":" ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"a4ddd17277c02ab7c0af50c9246e7511","permalink":"http://vcg.isti.cnr.it/publication/2014/TPS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/TPS14/","section":"publication","summary":"Project Page In the context of real-time, GPU-based rendering of animated skinned meshes, we propose a new algorithm to compute surface normals with minimal overhead both in terms of the memory footprint and the required per-vertex operations. By accounting for the variation of the skinning weights over the surface, we achieve a higher visual quality compared to the standard approximation ubiquitously used in video-game engines and other real-time applications. Our method supports Linear Blend Skinning and Dual Quaternion Skinning. We demonstrate the advantages of our technique on a variety of datasets and provide a complete open-source implementation, including GLSL shaders.","tags":null,"title":"Accurate and Efficient Lighting for Skinned Models","type":"publication"},{"authors":["Marco Potenziani","Massimiliano Corsini","Marco Callieri","Marco Di Benedetto","Federico Ponchio","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"993353d4bc9ecf07e86ed82dfa6a9132","permalink":"http://vcg.isti.cnr.it/publication/2014/PCCDPDS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/PCCDPDS14/","section":"publication","summary":" ","tags":null,"title":"An Advanced Solution for Publishing 3D Content on the Web","type":"publication"},{"authors":["Arjen Boin","Frederik Bynander","Giovanni Pintore","Fabio Ganovelli","George Leventakis","Alexandre Ahmad","Olivier Balet"],"categories":null,"content":"","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"f37b0f934db97cffd3553a6fae415e32","permalink":"http://vcg.isti.cnr.it/publication/2014/BBPGLAB14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/BBPGLAB14/","section":"publication","summary":"","tags":null,"title":"Building an IT Platform for Strategic Crisis Management Preparation","type":"publication"},{"authors":["Francesco Banterle","Alessandro Artusi","Paolo Francesco Banterle","Roberto Scopigno"],"categories":null,"content":"","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"523eef982b22eaadaf0fe52e2169e115","permalink":"http://vcg.isti.cnr.it/publication/2014/BABS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/BABS14/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstractPhysically based renderers produce high quality images with high dynamic range (HDR) values. Therefore, these images need to be tone mapped in order to be displayed on low dynamic range (LDR) displays. A typical approach is to blindly apply tone mapping operators without taking advantage of the extra information that comes for free from the modeling process for creating a 3D scene. In this paper, we propose a novel pipeline for tone mapping high dynamic range (HDR) images which are generated using physically based renderers. Our work exploits information of a 3D scene, such as geometry, materials, luminaries, etc. This allows to limit the assumptions that are typically made during the tone mapping step. As consequence of this, we will show improvements in term of quality while keeping the entire process straightforward.","tags":null,"title":"CG-TMO: A Local Tone Mapping for Computer Graphics Generated Content","type":"publication"},{"authors":["Paolo Pingi","Eliana Siotto","Marco Callieri","Andrea Ferrara","Roberto Scopigno"],"categories":null,"content":"","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"ac88bcfea28f32420c7b56ec4859fba3","permalink":"http://vcg.isti.cnr.it/publication/2014/PSCFS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/PSCFS14/","section":"publication","summary":"","tags":null,"title":"Dallo stato di rudere alla realtà virtuale","type":"publication"},{"authors":["Matteo Dellepiane","Marco Callieri","Nico Pietroni","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"8ce765a0fc3b07a39160e9fb22543c4c","permalink":"http://vcg.isti.cnr.it/publication/2014/SCPCD14a/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/SCPCD14a/","section":"publication","summary":"","tags":null,"title":"Digital Fabrication Technologies for Cultural Heritage (STAR)","type":"publication"},{"authors":["Paul Lauga","Giuseppe Valenzise","Francesca De Simone","Frederic Dufaux","Francesco Banterle"],"categories":null,"content":"","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"fddfb45460b8bf00667a7fdcd2041686","permalink":"http://vcg.isti.cnr.it/publication/2014/DVLDB14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/DVLDB14/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstractThe goal of this paper is to assess whether existing solutions to expand low dynamic range (LDR) still images to high dynamic range (HDR) displays can apply to moving pictures. To this end, we conduct a subjective quality assessment test on four state-of-the-art expansion operators, using high-quality input LDR content. Our results show that, perhaps surprisingly, no temporal artifacts, such as flickering due to global illumination changes, are introduced applying frame-based algorithms. In addition, they confirm previous studies in that operators as simple as linear expansion can yield acceptable (or even excellent) quality of the HDR video.","tags":null,"title":"Dynamic Range Expansion of Video Sequences: a Subjective Quality Assessment Study","type":"publication"},{"authors":["Marco Di Benedetto","Fabio Ganovelli","marcos balsa Rodriguez","Alberto Jaspe Villanueva","Enrico Gobbetti","Roberto Scopigno"],"categories":null,"content":" http://www.exploremaps.org\n","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"5771eed0ecdca3a63ab39b2cb23dd776","permalink":"http://vcg.isti.cnr.it/publication/2014/DGBJGS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/DGBJGS14/","section":"publication","summary":"http://www.exploremaps.org We introduce a novel efficient technique for automatically transforming a generic renderable 3D scene into a simple graph representation named ExploreMaps, where nodes are nicely placed point of views, called probes, and arcs are smooth paths between neighboring probes. Each probe is associated with a panoramic image enriched with preferred viewing orientations, and each path with a panoramic video. Our GPU-accelerated unattended construction pipeline distributes probes so as to guarantee coverage of the scene while accounting for perceptual criteria before finding smooth, good looking paths between neighboring probes. Images and videos are precomputed at construction time with off-line photorealistic rendering engines, providing a convincing 3D visualization beyond the limits of current real-time graphics techniques. At run-time, the graph is exploited both for creating automatic scene indexes and movie previews of complex scenes and for supporting interactive exploration through a low-DOF assisted navigation interface and the visual indexing of the scene provided by the selected viewpoints. Due to negligible CPU overhead and very limited use of GPU functionality, real-time performance is achieved on emerging web-based environments based on WebGL even on low-powered mobile devices.","tags":null,"title":"eXploreMaps: Efficient Construction and Ubiquitous Exploration of Panoramic View Graphcs of Complex 3D Environments","type":"publication"},{"authors":["Paolo Cignoni","Nico Pietroni","Luigi Malomo","Roberto Scopigno"],"categories":null,"content":" Talk Slides ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"821171018041d7b9fc7d8b823e0ec447","permalink":"http://vcg.isti.cnr.it/publication/2014/CPMS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/CPMS14/","section":"publication","summary":"Mesh joinery is an innovative method to produce illustrative shape approxi- mations suitable for fabrication. Mesh joinery is capable of producing com- plex fabricable structures in an efficient and visually pleasing manner. We represent an input geometry as a set of planar pieces arranged to compose a rigid structure, by exploiting an efficient slit mechanism. Since slices are planar, to fabricate them a standard 2D cutting system is enough. We automatically arrange slices according to a smooth cross field defined over the surface. Cross fields allow representing global features that char- acterize the appearance of the shape. Slice placement conforms to specific manufacturing constraints. Talk Slides","tags":null,"title":"Field-Aligned Mesh Joinery","type":"publication"},{"authors":["Daniele Panozzo","Enrico Puppo","Marco Tarini","Olga Sorkine-Hornung"],"categories":null,"content":" [source code]\n[experimental data]\n","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"6340e8558cd86c5b71422c1ae35cc9a4","permalink":"http://vcg.isti.cnr.it/publication/2014/PPTS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/PPTS14/","section":"publication","summary":"We introduce frame fields, which are a non-orthogonal and non-unit-length generalization of cross fields. Frame fields represent smoothly varying linear transformations on tangent spaces of a surface. We propose an algorithm to create discrete, dense frame fields that satisfy a sparse set of constraints. By computing a surface deformation that warps a frame field into a cross field, we generalize existing quadrangulation algorithms to generate anisotropic and non-uniform quad meshes whose elements shapes match the frame field. With this, our framework enables users to control not only the alignment but also the density and anisotropy of the elements' distribution, resulting in high-quality adaptive quad meshing. [source code] [experimental data]","tags":null,"title":"Frame fields: Anisotropic and non-orthogonal cross fields","type":"publication"},{"authors":["Eliana Siotto","Marco Callieri","Paolo Pingi","Roberto Scopigno","Laura Benassi","Alice Parri","Denise La Monica","Andrea Ferrara"],"categories":null,"content":"","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"0e945f37cb813f69ecde163a78d66097","permalink":"http://vcg.isti.cnr.it/publication/2014/SCPSBPLF14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/SCPSBPLF14/","section":"publication","summary":"","tags":null,"title":"From the archival documentation to standardised web database and 3D models: the case study of the Camaldolese Abbey in Volterra (Italy) ","type":"publication"},{"authors":["Giuseppe Alemanno","Paolo Cignoni","Nico Pietroni","Federico Ponchio","Roberto Scopigno"],"categories":null,"content":" Talk Slides ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"37fd3e16c7bbf5535984c98e99678a82","permalink":"http://vcg.isti.cnr.it/publication/2014/ACPPS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/ACPPS14/","section":"publication","summary":"abstract We propose a technique to decompose a 3D digital shape into a set of interlocking pieces that are easy to be manufactured and assembled. The pieces are designed so that they can be represented as a simple height field and, therefore, they can be manufactured by common 3D printers without the usage of supporting material. The removal of the supporting material is often a burdensome task and may eventually damage the surface of the printed object. Our approach makes the final reproduction cheaper, accurate and suitable for the reproduction of tangible cultural heritages. Moreover, since the proposed technique decomposes the artwork in pieces, it also overcomes the working space limits of common printers. The decomposition of the input (high-resolution) triangular mesh is driven by a coarse polygonal base mesh (representing the target subdivision in pieces); the height fields defining each piece are generated by sampling distances along the normal of each face composing the base mesh. A innovative interlocking mechanism allows adjacent pieces to plug each other to compose the final shape. This interlocking mechanism is designed to preserve the height field property of the pieces and to provide a sufficient degree of grip to ensure the assembled structure shape to be compact and stable. We demonstrate the effectiveness of our approach and show its limitations with some practical reproduction examples. Talk Slides","tags":null,"title":"Interlocking pieces for printing tangible Cultural Heritage replicas","type":"publication"},{"authors":["Fabio Ganovelli","Massimiliano Corsini","Sumanta Pattanaik","Marco Di Benedetto"],"categories":null,"content":" ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"61fd0d06689e51806147fea08142cbb2","permalink":"http://vcg.isti.cnr.it/publication/2014/GCPD14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/GCPD14/","section":"publication","summary":"http://www.envymycarbook.com This book guides students in developing their own interactive graphics application. The authors show step by step how to implement computer graphics concepts and theory using the EnvyMyCar (NVMC) framework as a consistent example throughout the text. They use the WebGL graphics API to develop NVMC, a simple, interactive car racing game. Each chapter focuses on a particular computer graphics aspect, such as 3D modeling and lighting. The authors help students understand how to handle 3D geometric transformations, texturing, complex lighting effects, and more. This practical approach leads students to draw the elements and effects needed to ultimately create a visually pleasing car racing game.","tags":null,"title":"Introduction to Computer Graphics: a Practical Learning Approach","type":"publication"},{"authors":["Luca Benedetti","Holger Winnemoeller","Massimiliano Corsini","Roberto Scopigno"],"categories":null,"content":"","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"7a9e90dc1a333742088e37662fdc5528","permalink":"http://vcg.isti.cnr.it/publication/2014/BWCS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/BWCS14/","section":"publication","summary":"","tags":null,"title":"Painting with Bob: Assisted Creativity for Novices","type":"publication"},{"authors":["Denis Zorin","Nico Pietroni","Ashish Myles"],"categories":null,"content":" talk Slides Input data for our experiments Results of MIQ Results for BD Results for IGM Our Results ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"77e0c3ebbde2c0fba5291eccb54ea0e5","permalink":"http://vcg.isti.cnr.it/publication/2014/MPZ14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/MPZ14/","section":"publication","summary":"abstract p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Times; min-height: 14.0px} p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Times} We present a robust method for computing locally bijective global parametrizations aligned with a given cross-field. The singulari- ties of the parametrization in general agree with singularities of the field, except in a small number of cases when several additional cones need to be added in a controlled way. Parametric lines can be constrained to follow an arbitrary set of feature lines on the surface. Our method is based on constructing an initial quad patch partition using robust cross-field integral line tracing. This process is fol- lowed by an algorithm modifying the quad layout structure to en- sure that consistent parametric lengths can be assigned to the edges. For most meshes, the layout modification algorithm does not add new singularities; a small number of singularities may be added to resolve an explicitly described set of layouts. We demonstrate that our algorithm succeeds on a test data set of over a hundred meshes. talk Slides Here the results of our experiments: Input data for our experiments Results of MIQ Results for BD Results for IGM Our Results","tags":null,"title":"Robust Field-aligned Global Parametrization","type":"publication"},{"authors":["Fabrizio Costantino","Simone Durazzani","Daniele Poggi","Marco Callieri","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"ddf08df98eee02abb23909edd54d24e4","permalink":"http://vcg.isti.cnr.it/publication/2014/CDPCDS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/CDPCDS14/","section":"publication","summary":" ","tags":null,"title":"San Leonardo in Arcetri: innovazione tecnologica per la gestione integrata dei beni culturali","type":"publication"},{"authors":["Mara De Matteis","Matteo Dellepiane"],"categories":null,"content":" ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"27c6ea9cded641f05d4b2c27acf02e0a","permalink":"http://vcg.isti.cnr.it/publication/2014/DD14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/DD14/","section":"publication","summary":" ","tags":null,"title":"Site-specific Art and 3D: an Example of Spatial Analysis and Reconstruction","type":"publication"},{"authors":["Andrea Baldacci","Fabio Ganovelli","Massimiliano Corsini","Roberto Scopigno"],"categories":null,"content":" ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"1ef5c9e58ca3bc5b6580f4dfe9c67f45","permalink":"http://vcg.isti.cnr.it/publication/2014/BGCS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/BGCS14/","section":"publication","summary":" ","tags":null,"title":"Stereo-browsing from Calibrated Cameras","type":"publication"},{"authors":["Gianpaolo Palma","Monica Baldassarri","Maria Chiara Favilla","Roberto Scopigno"],"categories":null,"content":" ","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"0e73aa13149bc82fa14f3b77257bf361","permalink":"http://vcg.isti.cnr.it/publication/2014/PBFS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/PBFS14/","section":"publication","summary":"Online publication \t \t Online kiosk","tags":null,"title":"Storytelling of a Coin Collection by Means of RTI Images: the Case of the Simoneschi Collection in Palazzo Blu","type":"publication"},{"authors":["Katarzyna Wilkosinska","Andreas Aderhold","Massimiliano Corsini","Yvonne Jung","Holger Graf","Arjan Kujiper"],"categories":null,"content":"","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"eab786d110df4cf11c8fdbb043fe0bce","permalink":"http://vcg.isti.cnr.it/publication/2014/AWCJGK14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/AWCJGK14/","section":"publication","summary":"","tags":null,"title":"The Common Implementation Framework as Service – Towards Novel Applications for Streamlined Presentation of 3D Content on the Web","type":"publication"},{"authors":["Marco Di Benedetto","Federico Ponchio","Luigi Malomo","Marco Callieri","Matteo Dellepiane","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1388534400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1388534400,"objectID":"d7eec4259aa55321814625f45da3e935","permalink":"http://vcg.isti.cnr.it/publication/2014/DPMCDCS14/","publishdate":"2014-01-01T00:00:00Z","relpermalink":"/publication/2014/DPMCDCS14/","section":"publication","summary":"","tags":null,"title":"Web and mobile visualization for Cultural Heritage","type":"publication"},{"authors":null,"categories":null,"content":"Our fellow Francesco Banterle was appointed Editor in Chief of the Journal of Graphics Tools.\n","date":1359072e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1359072e3,"objectID":"ca3efa589c61d37a1ceed198882d7fe2","permalink":"http://vcg.isti.cnr.it/post/13-01-25-banterle-editor/","publishdate":"2013-01-25T00:00:00Z","relpermalink":"/post/13-01-25-banterle-editor/","section":"post","summary":"Our fellow Francesco Banterle was appointed Editor in Chief of the Journal of Graphics Tools.","tags":null,"title":"Francesco Banterle new Editor in Chief of the Journal of Graphics Tools","type":"post"},{"authors":["Gregorio Palmas","Nico Pietroni","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" Project Page Talk Slides ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"d90f162dfb9d87d025ad1057f484393e","permalink":"http://vcg.isti.cnr.it/publication/2013/PPCS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/PPCS13/","section":"publication","summary":"We propose a computer-assisted constraint-based methodology for virtual reassembly of Cultural Heritage (CH) artworks. Instead than focusing on automatic, unassisted re- assembly, we targeted the scenarios where the reconstruction process is not be based on shape properties only but it is build over the experience and intuition of a CH expert. Our purpose is therefore to design a flexible interactive system, based on the selection of a set of constraints which relates different fragments, according to the understanding and experience of the CH operator. Once the user has defined those constraints, the system searches for a suitable solution, using a global energy minimization strategy that considers simultaneously all the pieces involved in the reconstruction process. Additionally, our framework provides the possibility to work in a hierarchical way, mimicking the traditional physical procedure that archaeologists use to reassemble tangible fractured objects. The frameworks is designed to work even with fragments that could have been severely damaged or eroded. On those datasets, automatic approaches may often fail, since the fractured regions do not contain enough geometric information to infer the correct matches. We present some successful uses of our framework on real application scenarios. Project Page Talk Slides","tags":null,"title":"A computer-assisted constraint-based system for assembling fragmented objects","type":"publication"},{"authors":["Giorgio Marcias","Nico Pietroni","Daniele Panozzo","Enrico Puppo","Olga Sorkine"],"categories":null,"content":" Talk Slides Data Code ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"776cf8416d788a425e5ddb0229bb3156","permalink":"http://vcg.isti.cnr.it/publication/2013/MPPPS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/MPPPS13/","section":"publication","summary":"Geometric meshes that model animated characters must be designed while taking into account the deformations that the shape will undergo during animation. We analyze an input sequence of meshes with point-to-point correspondence, and we automatically produce a quadrangular mesh that fits well the input animation. We first analyze the local deformation that the surface undergoes at each point, and we initialize a cross field that remains as aligned as possible to the principal directions of deformation throughout the sequence. We then smooth this cross field based on an energy that uses a weighted combination of the initial field and the local amount of stretch. Finally, we compute a field-aligned quadrangulation with an off-the-shelf method. Our technique is fast and very simple to implement, and it significantly improves the quality of the output quad mesh and its suitability for character animation, compared to creating the quad mesh based on a single pose. We present experimental results and comparisons with a state-of-the-art quadrangulation method, on both sequences from 3D scanning and synthetic sequences obtained by a rough animation of a triangulated model. Talk Slides Data Code","tags":null,"title":"Animation-Aware Quadrangulation","type":"publication"},{"authors":["Matteo Dellepiane","Nicolo Dell Unto","Marco Callieri","Stefan Lindgren","Roberto Scopigno"],"categories":null,"content":" ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"be9b8753c115fc0e46b99394b6047a98","permalink":"http://vcg.isti.cnr.it/publication/2013/DDCLS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/DDCLS13/","section":"publication","summary":" ","tags":null,"title":"Archeological excavation monitoring using dense stereo matching techniques","type":"publication"},{"authors":["Marco Callieri","Chiara Leoni","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"3012a1b1650c2b5c1d04eed6093cb8a2","permalink":"http://vcg.isti.cnr.it/publication/2013/CLDS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/CLDS13/","section":"publication","summary":" ","tags":null,"title":"Artworks narrating a story: a modular framework for the integrated presentation of three-dimensional and textual contents","type":"publication"},{"authors":["Matteo Dellepiane","Emanuele Cavarretta","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"1e7dc3bc6e60c57c25c71ca60634d5f4","permalink":"http://vcg.isti.cnr.it/publication/2013/DCCS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/DCCS13/","section":"publication","summary":" ","tags":null,"title":"Assisted Multi-view Stereo reconstruction ","type":"publication"},{"authors":["Erik Reinhard","Hans-Peter Seidel","Ahmet Oguz Akyuz","Francesco Banterle","Alessandro Artusi","Tania Pouli"],"categories":null,"content":"","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"3f6576bf21239105a9cf961501cb7dc3","permalink":"http://vcg.isti.cnr.it/publication/2013/PABASR13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/PABASR13/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstractHigh dynamic range images require tone reproduction to match the range of values to the capabilities of the display. For computational reasons as well as absence of fully calibrated imagery, rudimentary color reproduction is often added as a post-processing step rather than integrated into the tone reproduction algorithm. However, in the general case this currently requires manual parameter tuning, although for some global tone reproduction operators, parameter settings can be inferred from the tone curve. We present a novel and fully automatic saturation correction technique, suitable for any tone reproduction operator, which exhibits better color reproduction than the state-of-the-art and we validate its comparative effectiveness through psychophysical experimentation.","tags":null,"title":"Color Correction for Tone Reproduction","type":"publication"},{"authors":["Nicolo Dell Unto","Daniele Ferdani","Anne-Marie Leander","Matteo Dellepiane","Marco Callieri","Stefan Lindgren"],"categories":null,"content":" ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"402cd670a0f62c02980ccee5b39e232b","permalink":"http://vcg.isti.cnr.it/publication/2013/DFLDCL13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/DFLDCL13/","section":"publication","summary":" ","tags":null,"title":"Digital reconstruction and visualization in archaeology Case-study drawn from the work of the Swedish Pompeii Project ","type":"publication"},{"authors":["Cristian Brognara","Massimiliano Corsini","Matteo Dellepiane","Andrea Giachetti"],"categories":null,"content":"","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"e6e109b79354c795e4d088a72722fa51","permalink":"http://vcg.isti.cnr.it/publication/2013/BCDG13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/BCDG13/","section":"publication","summary":"","tags":null,"title":"Edge Detection on Polynomial Texture Maps","type":"publication"},{"authors":["Francesco Banterle","Marco Callieri","Matteo Dellepiane","Massimiliano Corsini","Fabio Pellacini","Roberto Scopigno"],"categories":null,"content":"here\nPiccante\n","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"d68c07fbca43f8477b8607ed3ffcf658","permalink":"http://vcg.isti.cnr.it/publication/2013/BCDCPS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/BCDCPS13/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstractIn this paper, we present EnvyDepth, an interface for recovering local illumination from a single HDR environment map. In EnvyDepth, the user quickly indicates strokes to mark regions of the environment map that should be grouped together in a single geometric primitive. From these annotated strokes, EnvyDepth uses edit propagation to create a detailed collection of virtual point lights that reproduce both the local and the distant lighting effects in the original scene. When compared to the sole use of the distant illumination, the added spatial information better reproduces a variety of local effects such as shadows, highlights and caustics. Without the effort needed to create precise scene reconstructions, EnvyDepth annotations take only tens of seconds to produce a plausible lighting without visible artifacts. This is easy to obtain even in the case of complex scenes, both indoors and outdoors. The generated lighting environments work well in a production pipeline since they are efficient to use and able to produce accurate renderings.\n\n\n\n\n\nErrata: the Amsterdam Road example is not in Amsterdam but in Hague.\n\nSoftwareA first version of EnvyDepth can be now dowloaded here; spiced by Piccante. Tutorial Video","tags":null,"title":"EnvyDepth: An Interface for Recovering Local Natural Illumination from Environment Maps","type":"publication"},{"authors":["Massimiliano Corsini","Matteo Dellepiane","Fabio Ganovelli","Riccardo Gherardi","Andrea Fusiello","Roberto Scopigno"],"categories":null,"content":" ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"b77c820222c1796384efa57ecfa55197","permalink":"http://vcg.isti.cnr.it/publication/2013/CDGGFS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/CDGGFS13/","section":"publication","summary":" ","tags":null,"title":"Fully Automatic Registration of Image Sets on Approximate Geometry","type":"publication"},{"authors":["Luca Benedetti","Massimiliano Corsini","Matteo Dellepiane","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"eb79d2be8ee8b8eaf15db0e59f64cdbb","permalink":"http://vcg.isti.cnr.it/publication/2013/BCDCS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/BCDCS13/","section":"publication","summary":"","tags":null,"title":"GAIL: Geometry-aware Automatic Image Localization","type":"publication"},{"authors":["Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"6ded3181a5f6076fee180a9cc6f281cf","permalink":"http://vcg.isti.cnr.it/publication/2013/DS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/DS13/","section":"publication","summary":" ","tags":null,"title":"Global refinement of image-to-geometry registration for color projection","type":"publication"},{"authors":["Vassilios Solachidis","Emanuele Maiorana","Patrizio Campisi","Francesco Banterle"],"categories":null,"content":"","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"4809fe36b37156de2291f15ca49847f7","permalink":"http://vcg.isti.cnr.it/publication/2013/SMCB13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/SMCB13/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstractThe present paper proposes a novel watermarking scheme specifically designed for high dynamic range (HDR) images. The employed embedding strategy is based on a decomposition of the original HDR representation into multiple low dynamic range (LDR) images by means of a bracketing process. After having inserted the selected watermark into each LDR component, the final output is generated by combining the available contributions into a single HDR object. By exploiting some of the well studied properties of digital watermarking for standard LDR images, our approach is able to generate a watermarked HDR image visually equivalent to the original one, while allowing to detect the embedded information in both the marked HDR image and in its LDR counterpart, obtained through tone-mapping operators or by extracting a specific luminance range of interest from it. Several results obtained from an extensive set of experimental tests are reported to testify the effectiveness of the proposed scheme.","tags":null,"title":"HDR Image Watermarking based on Bracketing Decomposition","type":"publication"},{"authors":["Lucia Arbace","Sonnino Elisabetta","Marco Callieri","Matteo Dellepiane","M. Fabbri","Iaccarino Idelson Antonio","Roberto Scopigno"],"categories":null,"content":" ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"b957f79433069559780352b5beb99b2e","permalink":"http://vcg.isti.cnr.it/publication/2013/AECDFAS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/AECDFAS13/","section":"publication","summary":" ","tags":null,"title":"Innovative uses of 3D digital technologies to assist the restoration of a fragmented terracotta statue","type":"publication"},{"authors":["Guido Ranzuglia","Marco Callieri","Matteo Dellepiane","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"3f03868fc1f83a718c490bbfc5298e46","permalink":"http://vcg.isti.cnr.it/publication/2013/RCDCS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/RCDCS13/","section":"publication","summary":"","tags":null,"title":"MeshLab as a complete tool for the integration of photos and color with high resolution 3D geometry data","type":"publication"},{"authors":["Massimiliano Corsini","Mohamed-Chaker Larabi","Guillaume Lavoué","Oldrich Petrik","Libor Vasa","Kai Wang"],"categories":null,"content":"","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"fb702f3da8cf7d28dd68b009be901c1d","permalink":"http://vcg.isti.cnr.it/publication/2013/CLLPVW13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/CLLPVW13/","section":"publication","summary":"","tags":null,"title":"Perceptual Metrics for Static and Dynamic Triangle Meshes","type":"publication"},{"authors":["Paolo Brivio","Luca Benedetti","Marco Tarini","Federico Ponchio","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"youTube videos\n","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"dd47737c27f0490d6919014ed094889d","permalink":"http://vcg.isti.cnr.it/publication/2013/BBTPCS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/BBTPCS13/","section":"publication","summary":"abstract\n\n\nAbstract\nPhotoCloud is a real-time client-server system for interactive visualization and exploration of large datasets comprising thousands of calibrated 2D photographs of a scene and a complex 3D description of the scene. The system is not tailored to any specific data acquisition process; it aims at generality and flexibility. PhotoCloud achieves scalability through a multiresolution dynamic hierarchical representation of the data, which is remotely stored and accessed by the client through an efficient cache system. The system includes a compact image browser and a multiresolution model renderer. PhotoCloud employs iconic visualization of the images in the 3D space and projects images onto the 3D scene on the fly. Users can navigate the 2D and 3D spaces with smooth, integrated, seamless transitions between them. A study with differently skilled users confirms PhotoCloud's effectiveness and communication power. The Web extras (youTube videos) are videos demonstrating PhotoCloud, a real-time client-server system for interactive exploration of large datasets comprising 2D photos and 3D models","tags":null,"title":"PhotoCloud: interactive remote exploration of large 2D-3D datasets","type":"publication"},{"authors":["Nicolo Dell Unto","Matteo Dellepiane","Marco Callieri","Anne-Marie Leander","Stefan Lindgren","Carolina Larsson"],"categories":null,"content":" ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"60948ec9fa93068314d511eebbef3744","permalink":"http://vcg.isti.cnr.it/publication/2013/DDCLLL13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/DDCLLL13/","section":"publication","summary":" ","tags":null,"title":"Pompei revived: Scanning Mission - Insula V 1","type":"publication"},{"authors":["Marco Tarini","Claudio Silva","Enrico Puppo","Nico Pietroni","Bruno Lévy","David Bommes","Denis Zorin"],"categories":null,"content":"","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"946462abd76bab2a5c4daf4e4a086743","permalink":"http://vcg.isti.cnr.it/publication/2013/BLPPSTZ13a/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/BLPPSTZ13a/","section":"publication","summary":"Triangle meshes have been nearly ubiquitous in computer graphics, and a large body of data structures and geometry processing algorithms based on them has been developed in the literature. At the same time, quadrilateral meshes, especially semi-regular ones, have advantages for many applications, and significant progress was made in quadrilateral mesh generation and processing during the last several years. In this survey we discuss the advantages and problems of techniques operating on quadrilateral meshes, including surface analysis and mesh quality, simplification, adaptive refinement, alignment with features, parametrisation and remeshing.","tags":null,"title":"Quad-Mesh Generation and Processing: A Survey","type":"publication"},{"authors":["Francesco Banterle","Alan Chalmers","Roberto Scopigno"],"categories":null,"content":"","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"640c2091819b1442ef298bd4b5a7b183","permalink":"http://vcg.isti.cnr.it/publication/2013/BCS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/BCS13/","section":"publication","summary":"abstract\n\n\n\n\n\n\nAbstractIn this paper, we present a novel parallel implementation of a high fidelity inverse tone mapping operator. Our method makes use of point based graphics to accelerate density estimation, and multi-core CPUs for extracting light sources. We show that our method can achieve real-time performance on a lower-end graphics card, with minimum loss of quality.","tags":null,"title":"Real-Time High Fidelity Inverse Tone Mapping for Low Dynamic Range Content","type":"publication"},{"authors":["Marco Tarini"],"categories":null,"content":"","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"8b7c9e6f12ae7adcdb3b6a6aa344150a","permalink":"http://vcg.isti.cnr.it/publication/2013/Tar13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/Tar13/","section":"publication","summary":"Project Page","tags":null,"title":"Sala del Grechetto: ricostruzione virtuale","type":"publication"},{"authors":["Gianpaolo Palma","Nicola Desogus","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"a6ed07c3b1bd0d286f29714a17871549","permalink":"http://vcg.isti.cnr.it/publication/2013/PDCS13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/PDCS13/","section":"publication","summary":"This paper presents an algorithm for the estimation of the Surface Light Field using video sequences acquired moving the camera around the object. Unlike other state of the art methods, it does not require a uniform sampling density of the view directions, but it is able to build an approximation of the Surface Light Field starting from a biased video acquisition: dense along the camera path and completely missing in the other directions. The main idea is to separate the estimation of two components: the diffuse color, computed using statistical operations that allow the estimation of a rough approximation of the direction of the main light sources in the acquisition environment; the other residual Surface Light Field effects, modeled as linear combination of spherical functions. From qualitative and numerical evaluations, the final rendering results show a high fidelity and similarity with the input video frames, without ringing and banding effects.","tags":null,"title":"Surface Light Field from Video Acquired in Uncontrolled Settings","type":"publication"},{"authors":["Chiara Leoni","Marco Callieri","Matteo Dellepiane","Roberto Rosselli Del Turco","Daniel O Donnell"],"categories":null,"content":" ","date":1356998400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1356998400,"objectID":"7145b382ab6c2d066a08394ed9a23717","permalink":"http://vcg.isti.cnr.it/publication/2013/LCDRO13/","publishdate":"2013-01-01T00:00:00Z","relpermalink":"/publication/2013/LCDRO13/","section":"publication","summary":" ","tags":null,"title":"The Dream and the Cross: bringing 3D content in a digital edition","type":"publication"},{"authors":null,"categories":null,"content":"Our paper Adaptive Quad Patches: an Adaptive Regular Structure for Web Distribution and Adaptive Rendering of 3D Models won the Best Paper Award of the 17th edition of ACM International Web3D Conference.\n","date":1344124800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1344124800,"objectID":"20964ef51842fa7715944b0191a6b198","permalink":"http://vcg.isti.cnr.it/post/12-08-05-best-paper/","publishdate":"2012-08-05T00:00:00Z","relpermalink":"/post/12-08-05-best-paper/","section":"post","summary":"Our paper Adaptive Quad Patches: an Adaptive Regular Structure for Web Distribution and Adaptive Rendering of 3D Models won the Best Paper Award of the 17th edition of ACM International Web3D Conference.","tags":null,"title":"Best Paper Award","type":"post"},{"authors":null,"categories":null,"content":"We have recently scanned the Capsella Samagher, a small but incredibly precious artwork conserved at the National Archaeological Museum in Venice. It is a small devotional ivory casket, with carved faces depicting scenes from early Christianity (an early representation of St. Peter Basilica in Rome). This scanning is part of a restoration and musealization project.\n","date":1338508800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1338508800,"objectID":"df46f35d6667191473c18d3c4191bc6c","permalink":"http://vcg.isti.cnr.it/post/12-06-01-scanning-venice/","publishdate":"2012-06-01T00:00:00Z","relpermalink":"/post/12-06-01-scanning-venice/","section":"post","summary":"We have recently scanned the Capsella Samagher, a small but incredibly precious artwork conserved at the National Archaeological Museum in Venice. It is a small devotional ivory casket, with carved faces depicting scenes from early Christianity (an early representation of St.","tags":null,"title":"3D scanning in Venice","type":"post"},{"authors":null,"categories":null,"content":"Roberto Scopigno has been appointed Editor in Chief of ACM JOCCH - Journal of Computing and Cultural Heritage for the term 2012-2015.\nACM JOCCH, established in 2008, is the main international journal on the theme of the innovative methodologies and uses of Information and Communication Technologies (ICT) in support of Cultural Heritage.\n","date":1335830400,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1335830400,"objectID":"9a9115b766f607f9dfdf351a1bbb0add","permalink":"http://vcg.isti.cnr.it/post/12-05-01-scopigno-editor-JOCCH/","publishdate":"2012-05-01T00:00:00Z","relpermalink":"/post/12-05-01-scopigno-editor-JOCCH/","section":"post","summary":"Roberto Scopigno has been appointed Editor in Chief of ACM JOCCH - Journal of Computing and Cultural Heritage for the term 2012-2015.\nACM JOCCH, established in 2008, is the main international journal on the theme of the innovative methodologies and uses of Information and Communication Technologies (ICT) in support of Cultural Heritage.","tags":null,"title":"Roberto Scopigno appointed Editor in Chief of ACM Journal of Computing and Cultural Heritage","type":"post"},{"authors":["Eliana Siotto","Marco Callieri","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":"","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"2e39d809bd76de755636c8d6ac441f02","permalink":"http://vcg.isti.cnr.it/publication/2012/SCDS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/SCDS12/","section":"publication","summary":"","tags":null,"title":"3D model of the sarcophagus of Ulpia Domnina: rendering of stored ancient color and virtual revival of original polychromy","type":"publication"},{"authors":["Giovanni Pintore","Enrico Gobbetti","Fabio Ganovelli","Paolo Brivio"],"categories":null,"content":"","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"edf1f2b589234f07a2c2ab235a832370","permalink":"http://vcg.isti.cnr.it/publication/2012/PGGB12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/PGGB12/","section":"publication","summary":"We report about the 3DNSITE system, a client-server 3D visualization tool which streams and visualizes tridimensional hybrid data on portable devices to support crisis managers and first responders during simulation and training of emergency operations. In this peculiar context is very important to share the same, large data in a web-based environment, accessing it through portable devices. Here it has to be visualized using simple and immediate interfaces, since the specific end-users are not necessary skilled with virtual reality and 3D objects interaction. The dataset itself is not static as well as in general purpose web based 3D browsers, but dynamic and changing during the evolution of the real or simulated crisis. According with these constraints, we propose a system which simplifies location recognition and visualizes dynamically updated pictorial data inside a virtual 3D environment. Our system is integrated in a more complex and articulated training and decision framework for emergency operations. 3DNSITE implements a novel aided intuitive interface designed to exploit touchscreen devices to easily navigate between 3D aligned photographs. Unlike common popular 3D maps browsers, the free 3D navigation through the whole 3D model is always supported, assuring an interactive representation of the scenario also when no photo is available. 3DNSITE enhances already presented state-of-the-art methods for managing the data, achieving an excellent scalability on portable devices in terms of both performance and amount of data. The system also scales over different devices according to their hardware resources and the available network bandwidth, exploiting a state-of-the-art multiresolution representation for the 3D model and a multi-level cache system, employed to web access both the images and the hierarchical 3D model structure.","tags":null,"title":"3DNSITE: A NETWORKED INTERACTIVE 3D VISUALIZATION SYSTEM TO SIMPLIFY LOCATION RECOGNITION IN CRISIS MANAGEMENT","type":"publication"},{"authors":["Francesco Banterle","Massimiliano Corsini","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"link to the official journal\nPiccante\nOpenGL ES 2.0 shaders source code and data\n","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"3b401df10c6955ad82f2f313f87a1284","permalink":"http://vcg.isti.cnr.it/publication/2012/BCCS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BCCS12/","section":"publication","summary":"abstract\n\n\n\n\n\n\n\n\n\nfunction log(msg) { var textarea = document.getElementById(\"log-area\"); textarea.innerHTML += (msg + \"\\n\"); textarea.scrollTop = textarea.scrollHeight; }\n$(document).ready(function() { $( \"#sliderSigmaS\" ).slider({ range: \"min\", min: 1, max: 100, value: 1, slide: function(event, ui){ $(\"#paraS\").text(ui.value); }, change: function(event, ui){ $(\"#paraS\").text(ui.value); } });\n$( \"#sliderSigmaR\" ).slider({ range: \"min\", min: 1, max: 100, value: 1, slide: function(event, ui){ $(\"#paraR\").text(ui.value); }, change: function(event, ui){ $(\"#paraR\").text(ui.value); } }); });\n\nSpiderGL.openNamespace();\nfunction CanvasHandler() { }\nCanvasHandler.prototype = {\n///////////////////////////////////////////////////////////////////////////////////// onInitialize : function () { var gl = this.ui.gl;\nvar quadPositions = new Float32Array([ -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0 ]);\nvar quadTexcoords = new Float32Array([ 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 1.0, 1.0 ]);\nvar quad = new SglModel(gl, { data : { vertexBuffers : { \"positionBuffer\" : { typedArray : quadPositions}, \"texcoordBuffer\" : { typedArray : quadTexcoords} }, indexBuffers : { } }, access : { vertexStreams : { \"position\" : { buffer : \"positionBuffer\", size : 2, type : SGL_FLOAT32, stride : 2 * SGL_SIZEOF_FLOAT32, offset : 0 }, \"texcoord\" : { buffer : \"texcoordBuffer\", size : 2, type : SGL_FLOAT32, stride : 2 * SGL_SIZEOF_FLOAT32, offset : 0 } }, primitiveStreams : { \"triangles\" : { mode : SGL_TRIANGLE_STRIP, first : 0, count : 4 //number of verticies } } }, semantic : { bindings : { \"COMMON\" : { vertexStreams : { \"POSITION\" : [ \"position\" ], \"TEXCOORD\": [ \"texcoord\" ] }, primitiveStreams : { \"FILL\" : [ \"triangles\" ] } } }, chunks : { \"chunk0\" : { techniques : { \"COMMON\" : { binding : \"COMMON\" } } } } }, logic : { parts : { \"main\" : { chunks : [ \"chunk0\" ] } } } }); this.quad = quad;\nvar fsQuad = new SglFragmentShader(gl,\"\\ precision highp float; \\n\\ \\n\\ uniform sampler2D sTexture;\\n\\ uniform sampler2D sTextureSamples; \\n\\ varying vec2 vTexcoord; \\n\\ uniform float scaleX, scaleY, scaleY2, sigma_r2, sigma_s2;\\n\\ \\n\\ \\n\\ void main(void) \\n\\ { \\n\\ vec3 colorRef = texture2D(sTexture, vTexcoord).xyz; \\n\\ vec3 color = vec3(0.0,0.0,0.0);\\n\\ float yFetch = vTexcoord.y*scaleY2;\\n\\ float weight = 0.0;\\n\\ for(int i=0;i","tags":null,"title":"A Low-Memory, Straightforward and Fast Bilateral Filter Through Subsampling in Spatial Domain","type":"publication"},{"authors":["Daniele Bernabei","Ajit Hakke Patil","Francesco Banterle","Marco Di Benedetto","Fabio Ganovelli","Sumanta Pattanaik","Roberto Scopigno"],"categories":null,"content":"","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"8eec6b191e1a41dcae1900544dea008b","permalink":"http://vcg.isti.cnr.it/publication/2012/BHBDGPS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BHBDGPS12/","section":"publication","summary":"","tags":null,"title":"A Parallel Architecture for Interactive Rendering of Scattering and Refraction Effects","type":"publication"},{"authors":["Gianpaolo Palma","Marco Callieri","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"d8d7d807eeef3e895178f9184a46c0f1","permalink":"http://vcg.isti.cnr.it/publication/2012/PCDS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/PCDS12/","section":"publication","summary":"We present a statistical method for the estimation of the Spatially Varying Bidirectional Reflectance Distribution Function (SVBRDF) of an object with complex geometry, starting from video sequences acquired with fixed but general lighting conditions. The aim of this work is to define a method that simplifies the acquisition phase of the object surface appearance and allows to reconstruct an approximated SVBRDF. The final output is suitable to be used with a 3D model of the object to obtain accurate and photo-realistic renderings. The method is composed by three steps: the approximation of the environment map of the acquisition scene, using the same object as a probe; the estimation of the diffuse color of the object; the estimation of the specular components of the main materials of the object, by using a Phong model. All the steps are based on statistical analysis of the color samples projected by the video sequences on the surface of the object. Although the method presents some limitations, the trade-off between the easiness of acquisition and the obtained results makes it useful for practical applications.","tags":null,"title":"A Statistical Method for SVBRDF Approximation from Video Sequences in General Lighting Conditions","type":"publication"},{"authors":["Marco Di Benedetto","Fabio Ganovelli","marcos balsa Rodriguez","Fabio Marton","Enrico Gobbetti"],"categories":null,"content":" ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"febb2d3d2c3e20f7861bee8a9318629a","permalink":"http://vcg.isti.cnr.it/publication/2012/GMBGD12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/GMBGD12/","section":"publication","summary":"We introduce an approach for efficient distribution and adaptive rendering of 3D mesh models supporting a simple quad parameterization. Our method extends and combines recent results in geometric processing, real-time rendering, and web programming. In particular: we exploit recent results on surface reconstruction and isometric parametrization to transform point clouds into two-manifold meshes whose parametrization domain is a small collection of 2D square regions; we encode the resulting parameterized meshes into a very compact multiresolution structures composed of variable resolution quad patches whose geometry and texture is stored in a tightly packed texture atlas; we adaptively stream and render variable resolution shape representations using a GPU-accelerated adaptive tessellation algorithm with negligible CPU overhead. Real-time performance is achieved on portable GPU platforms using OpenGL, as well as on exploiting emerging web-based environments based on WebGL. Promising applications of the technology range from the automatic creation of rapidly renderable objects for games to the set-up of browsable 3D models repositories in the web that will be accessible by upcoming generation of WebGL-enabled web browers","tags":null,"title":"ADAPTIVE QUAD PATCHES: AN ADAPTIVE REGULAR STRUCTURE FOR WEB DISTRIBUTION AND ADAPTIVE RENDERING OF 3D MODELS","type":"publication"},{"authors":["Francesco Banterle","Roberto Scopigno"],"categories":null,"content":"","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"14d62aae39e3a08bb45174ce57d763a2","permalink":"http://vcg.isti.cnr.it/publication/2012/BS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BS12/","section":"publication","summary":"abstract\n\n\n\n\n\nSource code and binaries soon!\nAbstract In this paper, we present BoostHDR, a novel method for compressing high dynamic range (HDR) images. The algorithm leverages on a novel segmentation-based tone mapping operator (TMO) which relaxes the no seams constraint. Our method can work with both JPEG and JPEG2000 encoders. Moreover, it provides better results compared to the state of the art in HDR images compression algorithms in terms of bit per pixels (bpp), and visual quality using objective metrics. Keywords: HDR Imaging, HDR Image Compression","tags":null,"title":"BoostHDR: A novel backward-compatible method for HDR images","type":"publication"},{"authors":["Luca Benedetti","Massimiliano Corsini","Paolo Cignoni","Marco Callieri","Roberto Scopigno"],"categories":null,"content":"","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"2c9ffcd659b2780eba61089a09cb0807","permalink":"http://vcg.isti.cnr.it/publication/2012/BCCCS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BCCCS12/","section":"publication","summary":"","tags":null,"title":"Color to gray conversions in the context of stereo matching algorithms","type":"publication"},{"authors":["Marco Tarini"],"categories":null,"content":" link to the homepages\nonline\n","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"f0352da73f6861c7ad77dae549b16302","permalink":"http://vcg.isti.cnr.it/publication/2012/Tar12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/Tar12/","section":"publication","summary":"link to the homepages Abstract A simple rendering method to avoid vertex seams in cylindrical and toroidal UV mappings used for texture mapping is presented. (A vertex seam is a vertex duplication of a polygonal mesh with different texture coordinates assigned to the two geometrically coinciding copies.) As a result, the method leads to simpler, leaner, replication-free data structures. Is also allows for a higher degree of proceduralism in generation of texture coordinates. The method is general, trivial to implement (exhaustive pseudocode is provided), very low in cost on resources (with a virtually null impact on performance), and it leverages only basic mechanisms widely available in most GPU implementations. An open-source implementation is available online.","tags":null,"title":"Cylindrical and Toroidal Parameterizations Without Vertex Seams","type":"publication"},{"authors":["Francesco Banterle","Alessandro Artusi","Elena Sikudova","Thomas Edward William Bashford-Rogers","Patrick Ledda","Marina Bloj","Alan Chalmers"],"categories":null,"content":"HDR Toolbox\n","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"ecc767680996c4d89ce17bb73c9a01d7","permalink":"http://vcg.isti.cnr.it/publication/2012/BASBLBC12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BASBLBC12/","section":"publication","summary":"abstract\n\n\n\n\n\nSource code in the HDR Toolbox (BanterleTMO.m)\nAbstract In this paper we present a new technique for the display of High Dynamic Range (HDR) images on Low Dynamic Range (LDR) displays. The described process has three stages. First, the input image is segmented into luminance zones. Second, the tone mapping operator (TMO) that performs better in each zone is automatically selected. Finally, the resulting tone mapping (TM) outputs for each zone are merged, generating the final LDR output image. To establish the TMO that performs better in each luminance zone we conducted a preliminary psychophysical experiment using a set of HDR images and six different TMOs. We validated our composite technique on several (new) HDR images and conducted a further psychophysical experiment, using an HDR display as reference, that establishes the advantages of our hybrid three-stage approach over a traditional individual TMO.\n\n\n\n\n\nSchematic description of our Framework. First, the HDR input image is segmented into luminance zones and a zone map is created. Second, the optimal TMO for each zone is applied on the whole input image generating different output images (one for each zone). Finally the tone mapped images are merged and the final output is generated. (For visualization purposes we only show the specific zone tone mapped in the Tone Mapped Zones image on the right.)","tags":null,"title":"Dynamic Range Compression by Differential Zone Mapping Based on Psychophysical Experiments","type":"publication"},{"authors":["Massimiliano Corsini","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"bd5d3e8b449cf96b1032fc1b7834e90f","permalink":"http://vcg.isti.cnr.it/publication/2012/CCS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/CCS12/","section":"publication","summary":" ","tags":null,"title":"Efficient and Flexible Sampling with Blue Noise Properties of Triangular Meshes","type":"publication"},{"authors":["Matteo Dellepiane","Ricardo Marroquim","Marco Callieri","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"9dad4ec64283d5b7a1133ca366f4bb6b","permalink":"http://vcg.isti.cnr.it/publication/2012/DMCCS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/DMCCS12/","section":"publication","summary":" ","tags":null,"title":"Flow-Based Local Optimization for Image-to-Geometry Projection","type":"publication"},{"authors":["Frederic Larue","Marco Di Benedetto","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"437da928bd23ee8e27535e235cdc804d","permalink":"http://vcg.isti.cnr.it/publication/2012/LDDS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/LDDS12/","section":"publication","summary":" ","tags":null,"title":"From the Digitization of Cultural Artifacts to the Web Publishing of Digital 3D Collections: an Automatic Pipeline for Knowledge Sharing","type":"publication"},{"authors":["Jaime Kaminski","Karina Rodriguez Echavarria","David Arnold","Gianpaolo Palma","Roberto Scopigno","Marc Proesmans","James Stevenson"],"categories":null,"content":"","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"206a88438e56a91eeb7df556f1cf9afd","permalink":"http://vcg.isti.cnr.it/publication/2012/KRAPSPS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/KRAPSPS12/","section":"publication","summary":"","tags":null,"title":"Insourcing, outsourcing and crowdsourcing 3D collection formation: perspectives for cultural heritage sites","type":"publication"},{"authors":["Giuseppe Maraziti","Tiziana Loni","Maria F. Zini","Marco Callieri","Raluca Mihaela Andrei","Monica Zoppè"],"categories":null,"content":" ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"b9c3e5b58f6a8dd79abb91e9c16ea391","permalink":"http://vcg.isti.cnr.it/publication/2012/ACZLMZ12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/ACZLMZ12/","section":"publication","summary":" ","tags":null,"title":"Intuitive representation of surface properties of biomolecules using BioBlender","type":"publication"},{"authors":["Paolo Brivio","Marco Tarini","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"bcf7d2130decfdd9b2a5fbd3dcfa3fad","permalink":"http://vcg.isti.cnr.it/publication/2012/BTCS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BTCS12/","section":"publication","summary":" ","tags":null,"title":"Joint Interactive Visualization of 3D Models and Pictures in Walkable Scenes","type":"publication"},{"authors":["Laura Benassi","Alice Parri","Eliana Siotto","Marco Callieri","Paolo Pingi","Roberto Scopigno"],"categories":null,"content":"","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"73138b4ae8549a5caa45c0b3ee37bb24","permalink":"http://vcg.isti.cnr.it/publication/2012/BPSCPS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BPSCPS12/","section":"publication","summary":"","tags":null,"title":"Knowledge, science and enhancement of historical decaying buildings in Tuscany. The ArTeSalVa project","type":"publication"},{"authors":["Tobias Ritschel","Rafal Mantiuk","Diego Gutierrez","Elmar Eisemann","Piotr Didyk","Tunc Aydin","Alessandro Artusi","Francesco Banterle"],"categories":null,"content":"","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"865f1543d4541e6a5e9e04ee8f164c64","permalink":"http://vcg.isti.cnr.it/publication/2012/BAADEGMR12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BAADEGMR12/","section":"publication","summary":"abstract\n\n\n\n\nRetargeting is a process through which an image/a video is adapted from the display device for which it was meant (target display) to another one (retarget display). The retarget display has different features from the target one such as: dynamic range, discretization levels, color gamut, multi-view (3D), refresh rate, spatial resolution... This is a very relevant and hot topic in graphics, given the increasing number of display devices, from large, high-contrast screens to small cell phones with limited dynamic range; a lot of techniques are being published in different venues, and it's simply very hard to keep up. For instance, one of the few cases for which retargeting can be potentially straightforward is when adapting images from a larger display (in term of resolution) to a smaller one with the same aspect ratio: a low-pass filter followed by downsampling can then achieve good quality results. However, for most cases retargeting can be an ill-posed problem, such as when displaying Low Dynamic Range (LDR) or 8-bit content on High Dynamic Range (HDR) displays. Such a problem requires the retargeting algorithm to generate new content which is missing in the input image/frame. In this course, we will present the latest solutions and techniques for retargeting images along various dimensions such as dynamic range, colors, temporal and spatial resolutions, and offer for the first time a much-needed holistic view of the field. Moreover, we are going to show how to measure and analyze the changes applied to an image/video in terms of quality using both (subjective) psychophysical experiments and (objective) computational metrics. The course should be of interest to anyone involved in graphics in its broader sense, given the almost unavoidable need to retarget results to different devices: from developer that are interested to implement retargeting techniques, to users that just need an overall perspective, for researchers fully engaged in developing multi-dimensional retargeting techniques, for whom this course will serve as a solid background for future algorithms.\n\n\n\nSyllabus:\nIntroduction by Francesco Banterle Dynamic Range Retargeting: Tone Mapping by Rafal Mantiuk Dynamic Range Retargeting: Cornsweet Illusion and Glare in Tone Mapping by Tobias Ritschel Dynamic Range Retargeting: The Color Issue by Alessandro Artusi Dynamic Range Retargeting: Reverse/Inverse Tone Mapping by Francesco Banterle Spatial Image Retargeting by Diego Gutierrez Temporal Image Retargeting by Elmar Eisemann and Tobias Ritschel Quality Metrics by Tunc Aydin Stereo Retargeting by Piotr Didyk","tags":null,"title":"Mapping images to target devices: spatial, temporal, stereo, tone, and color","type":"publication"},{"authors":["Fabio Ganovelli","Roberto Scopigno"],"categories":null,"content":" ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"82a850a33c4471b725636ebd0053e540","permalink":"http://vcg.isti.cnr.it/publication/2012/GS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/GS12/","section":"publication","summary":"OCME (Out-of-Core Mesh Editing) is a novel data-structure and related algorithms for out-of-core editing of large meshes. OCME uses a hashed multigrid where the triangles are inserted on the base of their size and position. This choice allows a rapid access and, on average, a constant construction time per triangle. Unlike previous approaches, no explicit hierarchy is maintained and therefore insertion/modification/deletion of data does not require costly refitting procedures. OCME stores attributes locally, for example it allows to assign vertex color only to a small subparts of the dataset, and naturally handles multiple-scale datasets.","tags":null,"title":"OCME: out-of-core Mesh Editing Made Practical","type":"publication"},{"authors":["Paolo Brivio","Marco Tarini","Federico Ponchio","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"278ec9fb620c0c80c58f59e6968225cd","permalink":"http://vcg.isti.cnr.it/publication/2012/BTPCS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BTPCS12/","section":"publication","summary":"","tags":null,"title":"PileBars: Scalable Dynamic Thumbnail Bars","type":"publication"},{"authors":["David Bommes","Bruno Lévy","Nico Pietroni","Enrico Puppo","Claudio Silva","Marco Tarini","Denis Zorin"],"categories":null,"content":" Talk Slides ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"d91799990ab895511de5749eff8fc1f2","permalink":"http://vcg.isti.cnr.it/publication/2012/BLPPSTZ12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BLPPSTZ12/","section":"publication","summary":"abstract p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Times; min-height: 14.0px} p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Times} Triangle meshes have been nearly ubiquitous in computer graphics, and a large body of data structures and geometry processing algorithms based on them has been developed in the literature. At the same time, quadrilateral meshes, especially semi-regular ones, have advantages for many applications, and significant progress was made in quadrilateral mesh generation and processing during the last several years. In this State of the Art Report, we discuss the advantages and problems of techniques operating on quadrilateral meshes, including surface analysis and mesh quality, simplification, adaptive refinement, alignment with features, parametrization, and remeshing. Talk Slides","tags":null,"title":"Quad Meshing","type":"publication"},{"authors":["Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"11f5be2dfe5450e64ab1689b7f3b559d","permalink":"http://vcg.isti.cnr.it/publication/2012/DS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/DS12/","section":"publication","summary":" ","tags":null,"title":"Teaching 3D Acquisition for Cultural Heritage: a Theory and Practice Approach ","type":"publication"},{"authors":["Gianpaolo Palma","Eliana Siotto","Marc Proesmans","Monica Baldassarri","Clara Baracchini","Sabrina Batino","Roberto Scopigno"],"categories":null,"content":"","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"035f4a81eaa02a77f88fbe4696b7c8b1","permalink":"http://vcg.isti.cnr.it/publication/2012/PSPBBBS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/PSPBBBS12/","section":"publication","summary":"","tags":null,"title":"Telling The Story Of Ancient Coins By Means Of Interactive RTI Images Visualization","type":"publication"},{"authors":["Sabrina Batino","Marco Callieri","Daniele Duranti","Matteo Dellepiane","Paolo Pingi","Eliana Siotto","Roberto Scopigno"],"categories":null,"content":" ","date":1325376e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1325376e3,"objectID":"8df80bb1f3f7b5c2ea6616e214b0e8c0","permalink":"http://vcg.isti.cnr.it/publication/2012/BCDDPSS12/","publishdate":"2012-01-01T00:00:00Z","relpermalink":"/publication/2012/BCDDPSS12/","section":"publication","summary":" ","tags":null,"title":"Virtual Reconstruction of an Etruscan Tomb","type":"publication"},{"authors":["Roberto Scopigno","Marco Callieri","Paolo Cignoni","Massimiliano Corsini","Matteo Dellepiane","Federico Ponchio","Guido Ranzuglia"],"categories":null,"content":"","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"3fb8940bcfac74edb84df705a0563f25","permalink":"http://vcg.isti.cnr.it/publication/2011/SCCCDPR11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/SCCCDPR11/","section":"publication","summary":"","tags":null,"title":"3D models for Cultural Heritage: beyond plain visualization","type":"publication"},{"authors":["Daniele Bernabei","Fabio Ganovelli","Marco Di Benedetto","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":"","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"0998f5f084459d5555ef3da0dc26e68f","permalink":"http://vcg.isti.cnr.it/publication/2011/BGDDS11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/BGDDS11/","section":"publication","summary":"","tags":null,"title":"A Low-Cost Time-Critical Obstacle Avoidance System for the Visually Impaired","type":"publication"},{"authors":["Ruggero Pintus","Enrico Gobbetti","Marco Callieri"],"categories":null,"content":"","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"3501d7c9a39ee83d1dd6f9ab7ae759c9","permalink":"http://vcg.isti.cnr.it/publication/2011/PGC11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/PGC11/","section":"publication","summary":"","tags":null,"title":"A Streaming Framework for Seamless Detailed Photo Blending on Massive Point Clouds","type":"publication"},{"authors":["Alessandro Artusi","Francesco Banterle","Dmitry Chetverikov"],"categories":null,"content":"","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"6faf8565b369b097bd20baa7288d734c","permalink":"http://vcg.isti.cnr.it/publication/2011/ABC11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/ABC11/","section":"publication","summary":"abstract\n\n\n\n\n\n\n\nAbstractIn the real world, materials often show both diffuse and specular reflections. To separate these two reflection components may help applications which need consistent object surface appearance. In fact, many algorithms used in numerous tasks of computer vision, computer graphics and image processing, work under the assumption of perfect Lambertian surfaces (or perfect diffuse reflection). They consider specular pixels (or highlights) as outliers or noise. Moreover, the two reflection components can be processed separately and afterwards recombined to produce particular visual effects [MZK*06] (dichromatic editing Figure.1).\n\n\n\n\n\n\nFigure 2: Example of an image where the presence of highlights generates the loss of details and colour information. Details and colours are completely washed out in the highlights region.\n\n\n\nSeveral specularity removal techniques are available in literature; they differ in the information they use and in how it is used. Table 1 summarises how these techniques may be classified and in which paragraph of this survey they are explained. The notation used in Table 1 for the categories is the following: CSA, colour space analysis; NA, neighbourhood analysis; POL, polarization; IS, image sequences; MFI, multiple-flash images. The notation used in Table 1 for the techniques is the following: CRM, using colour reflection model [KSK87, KSK88]; TDA, 2D diagram approach [ST95b, SK00]; BM, Bajcsy et al. method [BLL96]; USFI, use of specular-free images [TI05b, YCK06, SC09]; PDE, PDE approach [MZK*06]; IT, in-panting technique [TLQ06]; CC, use of colour information and classifier [TFA05]; TS, separation of highlight reflections on textured surfaces [TLQ06]; FR, Fresnel methods [Ang07]; HM, histogram methods [CGS06]; HFLF, high-low frequency separation [LPD07, NGR06]; MBS, multi-baseline-stereo [LB92, LYK*03, LS01]; MII, deriving intrinsic images from image sequences with illumination changes [Wei01]; CP, colour and polarisation methods [NFB97, KLHS02, MPC*07, USGG04]; MF, multi-flash methods [FRTT04, ARNL05].\n\n\nTable 1: The classification of highlights removal methods. These methods are classified based on the number of image used as input an the type of information used. L and G respectively stand for global and local approach. The number, in the first column, indicates the paragraph in the paper where the technique appears in the survey.\n\n\n\n\n\n\n\n\n\n\nSingle Image\nMultiple Images\n\n\n\n\n\n\n\n\n\n\n\n\nTech. - Sec.\nType\nCSA\nNA\nIS\nMFI\nPOL\n\n\n\n\n\n\nCRM - 3.1.1\nG\nx\n- - - -\n\nTDA - 3.1.2\nL\nx\n- - - -\n\nBM - 3.1.3\nG\nx\n- - - -\n\nUSFI - 3.2.1\nL\n- x\n- - -\n\nPDE - 3.2.2\nL - x\n- - -\n\nIT - 3.2.3\nL - x\n- - -\n\nTS - 3.2.4\nL - x\n- - -\n\nCC - 3.2.5\nL - x\n- - -\n\nFR - 3.2.6\nG\n- x\n- - -\n\nHM - 4\nG\n- - x\n- -\n\nHFLF - 4\nG - - x\n- -\n\nMBS - 4.1\nG - - x\n- -\n\nMII - 4.2\nL\n- - x\n- -\n\nCP - 4.3\nG\n- - - -\nx\n\n\nMF - 4.4\nL\n- - - x\n-\n\n\n\n\n\n\n\n\n\nDiscussion Several factors may influence which approach is superior to another one, such as the number of images to be captured, automatic operation vs. manual help, light constraints and the reflectance model used, merits of quality, and the hardware used during the acquisition phase. Table 2 provides a comparative summary of the specular removal methods discussed in this survey.\n\n\n\nTable 2: Comparison of the highlight removal techniques by their characteristics. The methods are grouped into the single-image category (top) and the multiple-image category (bottom). User Interaction: MS manual segmentation, A automatic, NS no segmentation, Light Requirement: IC illuminant compensation, DM dichromatic reflectance model, and FM flash model. Hardware: S single camera, M multiple camera, * polarised filters, FS flash system\n\n\n\n\n\n\n\nTechnique\nImages\nUser Interaction\nLight Requirement\nHardware\n\n\n\n\n\n\n\nColour Space [KSK87, KSK88, ST95b, SK00, BLL96]\n1\nMS\nIC-DM\nS\n\n\nSpecular-Free Image [TI05b, YCK06, SC09]\n1\nA\nIC-DM S\n\nInpainting [TLQ06]\n1\nMS\nIC-DM S\n\nPDE [MZK*06]\n1\n-\nIC-DM S\n\nTextured Surfaces [TLQ06]\n1\nMS\nIC-DM S\n\nColour Classifier [TFA05]\n1\n-\n-\nS\n\nFresnel Coefficient [Ang07]\n1\nMS\nNo IC-DM S\n\nMulti-Baseline Stereo [LB92, LYK*03, LS01]\n50-70\nNS DM\nM\n\n\nDeriving Intrinsic Images [Wei01]\n40-70\nNS Lighting changes\nS\n\n\nPolarization [NFB97, KLHS02, MPC*07, USGG04]\n6-10\nNS DM\nS*\n\n\nHistogram [CGS06]\n200\nNS -\nS\n\n\nHigh-Low Frequency Separation [LPD07, NGR06]\n4, 32\nNS\n-\nS\n\n\nMulti-flash [FRTT04, ARNL05]\n4-8,2\nNS\nFM\nFS\n\n\n\n\n\n\n\n\n\n\nFinally we have performed several experiment, to compare different specularity removal techniques, on various input images starting from single-colour, multi-colour and textured surfaces, increasing the texture complexity.\n\nReferencesFor the references please see the paper.","tags":null,"title":"A Survey of Specularity Removal Methods","type":"publication"},{"authors":["Francesco Banterle","Alessandro Artusi","Kurt Debattista","Alan Chalmers"],"categories":null,"content":"link to the official website\nlink to the HDR Toolbox git repository\n","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"de55a764eeda5a7df1d1acb349aefc0e","permalink":"http://vcg.isti.cnr.it/publication/2011/BADC11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/BADC11/","section":"publication","summary":"abstract\n\n\n\n\n\nlink to the official website\n\nlink to the HDR Toolbox git repository\n\n\nTable of Contents This book is a practical introduction to the emerging new field of High Dynamic Range Imaging that combines photography, computer vision, and computer graphics. The book provides detailed equations and Matlab code. This allows the reader to have the tools for experimenting with HDR Imaging for producing compelling images.\n\nThe book is divided in the following chapters:\nIntroduction (a brief introduction on light, human vision, and color spaces) HDR Pipeline (including capturing, storing formats, and HDR monitors) Tone Mapping Expansion Operators for Low Dynamic Range Content (Inverse/Reverse Tone Mapping) Image-Based Lighting Evaluation of Tone Mapping and Expansion Operators HDR Content Compressiong (images, textures, and videos)\n\nThe book provides three appendecies on the Bilateral Filter, Retinex Filters, and how to use the HDR Toolbox for Matlab.","tags":null,"title":"Advanced High Dynamic Range Imaging: Theory and Practice","type":"publication"},{"authors":["Nico Pietroni","Massimiliano Corsini","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" Project Page Talk Slides ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"cd660377653695c8ec2d74957413fd60","permalink":"http://vcg.isti.cnr.it/publication/2011/PCCS11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/PCCS11/","section":"publication","summary":"Analyzing either high-frequency shape detail or any other 2D fields (scalar or vector) embedded over a 3D geometry is a complex task, since detaching the detail from the overall shape can be tricky. An alternative approach is to move to the 2D space, resolving shape reasoning to easier image processing techniques. In this paper we propose a novel framework for the analysis of 2D information distributed over 3D geometry, based on a locally smooth parametrization technique that allows us to treat local 3D data in terms of image content. Project Page Talk Slides","tags":null,"title":"An interactive local flattening operator to support digital investigations on artwork surfaces","type":"publication"},{"authors":["Marco Tarini","Enrico Puppo","Daniele Panozzo","Nico Pietroni","Paolo Cignoni"],"categories":null,"content":" Talk Slides ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"eda0a934fa02f45f54adb3b10bc09b22","permalink":"http://vcg.isti.cnr.it/publication/2011/PPTPC11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/PPTPC11/","section":"publication","summary":"We present an automatic method to produce a Catmull-Clark subdivision surface that fits a given input mesh. Its control mesh is coarse and adaptive, and it is obtained by simplifying an initial mesh at high resolution. Simplification occurs progressively via local operators and addresses both quality of surface and faithfulness to the input shape throughout the whole process. The method is robust and performs well on rather complex shapes. Displacement mapping or normal mapping can be applied to approximate the input shape arbitrarily well. Talk Slides","tags":null,"title":"Automatic Construction of Quad-Based Subdivision Surfaces using Fitmaps","type":"publication"},{"authors":["Frederic Larue","Matteo Dellepiane","Henning Hamer","Roberto Scopigno"],"categories":null,"content":" ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"894248aa58b9f0f5055afc653e2f057b","permalink":"http://vcg.isti.cnr.it/publication/2011/LDHS11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/LDHS11/","section":"publication","summary":" ","tags":null,"title":"Automatic Texturing without Illumination Artifacts from In-Hand Scanning Data Flow","type":"publication"},{"authors":["Maria Girardi","Cristina Padovani","Marco Callieri","Massimiliano Corsini"],"categories":null,"content":"","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"97c8fa8e9a1ff8afbc41c936fd3f8cf6","permalink":"http://vcg.isti.cnr.it/publication/2011/GPCC11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/GPCC11/","section":"publication","summary":"","tags":null,"title":"Digital Acquisition and Structural Analysis of the \"Rognosa\" Tower in San Gimignano","type":"publication"},{"authors":["Marco Callieri","Nicolo Dell Unto","Matteo Dellepiane","Roberto Scopigno","Bengt Soderberg","Lars Larsson"],"categories":null,"content":" ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"74f5f6dac7a4aecde466edebee61d0c6","permalink":"http://vcg.isti.cnr.it/publication/2011/CDDSSL11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/CDDSSL11/","section":"publication","summary":" ","tags":null,"title":"Documentation and Interpretation of an Archeological Excavation: an Experience with Dense Stereo Reconstruction Tools ","type":"publication"},{"authors":["Roberto Scopigno","Matteo Dellepiane","Francesco Banterle"],"categories":null,"content":" ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"63a071a616a34d4587289d6d7b599398","permalink":"http://vcg.isti.cnr.it/publication/2011/BDS11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/BDS11/","section":"publication","summary":"In this paper, we present a practical system for enhancing the quality of Low Dynamic Range (LDR) videos using High Dynamic Range (HDR) background images. Our technique relies on the assumption that the HDR information is static in the video footage. This assumption can be valid in many scenarios where moving subjects are the main focus of the footage and do not have to interact with moving light sources or highly reflective objects. Another valid scenario is teleconferencing via webcams, where the background is typically over-exposed, not allowing the users to perceive correctly the environment where the communication is happening.\nThese five short videos show the technique:\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nThese videos could not be done without the help of our actors and The Director. We thank in alphabetic order: Daniele Bernabei, Marco Di Benedetto, and Stefano Marras.","tags":null,"title":"Enhancement of Low Dynamic Range Videos using High Dynamic Range Backgrounds","type":"publication"},{"authors":["Denis Zorin","Olga Sorkine","Marco Tarini","Nico Pietroni"],"categories":null,"content":" Talk Slides ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"48a270f1ba69d9e991b07f7f846ef882","permalink":"http://vcg.isti.cnr.it/publication/2011/PTSZ11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/PTSZ11/","section":"publication","summary":"We present a method to globally parameterize a surface represented by height maps over a set of planes (range images). In contrast to other parameterization techniques, we do not start with a man ifold mesh. The parameterization we compute defines a manifold structure, it is seamless and globally smooth, can be aligned to geometric features and shows good quality in terms of angle and area preservation, comparable to current parameterization techniques for meshes. Computing such global seamless parameterization makes it possible to perform quad remeshing, texture mapping and texture synthesis and many other types of geometry processing operations. Our approach is based on a formulation of the Poisson equation on a manifold structure defined for the surface by the range images. Construction of such global parameterization requires only a way to project surface data onto a set of planes, and can be applied directly to implicit surfaces, nonmanifold surfaces, very large meshes, and collections of range scans. We demonstrate application of our technique to all these geometry types. Talk Slides","tags":null,"title":"Global Parametrization of Range Image Sets","type":"publication"},{"authors":["Matteo Dellepiane","Andrea Venturi","Roberto Scopigno"],"categories":null,"content":" ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"28ed8397c36988bb9cff510d2bcbf629","permalink":"http://vcg.isti.cnr.it/publication/2011/DVS11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/DVS11/","section":"publication","summary":" ","tags":null,"title":"Image Guided Reconstruction of Un-sampled Data: A Filling Technique for Cultural Heritage Models","type":"publication"},{"authors":["Frederic Larue","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"b7cbde2ce03c5742e5b8521be51df7f4","permalink":"http://vcg.isti.cnr.it/publication/2011/LDS11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/LDS11/","section":"publication","summary":" ","tags":null,"title":"Improving High-Speed Scanning Systems by Photometric Stereo","type":"publication"},{"authors":["Rafal Mantiuk","Diego Gutierrez","Elmar Eisemann","Piotr Didyk","Tunc Aydin","Alessandro Artusi","Francesco Banterle","Karol Myszkowski"],"categories":null,"content":"Introduction\nDynamic Range Retargeting: Tone Mapping\nDynamic Range Retargeting: Cornsweet Illusion and Glare in Tone Mapping\nDynamic Range Retargeting: The Color Issue\nDynamic Range Retargeting: Reverse/Inverse Tone Mapping\nSpatial Image Retargeting\nTemporal Image Retargeting\nQuality Metrics\nStereo Retargeting\n","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"ad8c76dd9d99795121587ce211836e98","permalink":"http://vcg.isti.cnr.it/publication/2011/BAADEGMM11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/BAADEGMM11/","section":"publication","summary":"abstract\n\n\n\n\nRetargeting is a process through which an image/a video is adapted from the display device for which it was meant (target display) to another one (retarget display). The retarget display has different features from the target one such as: dynamic range, discretization levels, color gamut, multi-view (3D), refresh rate, spatial resolution... This is a very relevant and hot topic in graphics, given the increasing number of display devices, from large, high-contrast screens to small cell phones with limited dynamic range; a lot of techniques are being published in different venues, and it's simply very hard to keep up. For instance, one of the few cases for which retargeting can be potentially straightforward is when adapting images from a larger display (in term of resolution) to a smaller one with the same aspect ratio: a low-pass filter followed by downsampling can then achieve good quality results. However, for most cases retargeting can be an ill-posed problem, such as when displaying Low Dynamic Range (LDR) or 8-bit content on High Dynamic Range (HDR) displays. Such a problem requires the retargeting algorithm to generate new content which is missing in the input image/frame. In this course, we will present the latest solutions and techniques for retargeting images along various dimensions such as dynamic range, colors, temporal and spatial resolutions, and offer for the first time a much-needed holistic view of the field. Moreover, we are going to show how to measure and analyze the changes applied to an image/video in terms of quality using both (subjective) psychophysical experiments and (objective) computational metrics. The course should be of interest to anyone involved in graphics in its broader sense, given the almost unavoidable need to retarget results to different devices: from developer that are interested to implement retargeting techniques, to users that just need an overall perspective, for researchers fully engaged in developing multi-dimensional retargeting techniques, for whom this course will serve as a solid background for future algorithms.\n\n\n\nSyllabus:\nIntroduction by Francesco Banterle Dynamic Range Retargeting: Tone Mapping by Rafal Mantiuk Dynamic Range Retargeting: Cornsweet Illusion and Glare in Tone Mapping by Karol Myszkowski Dynamic Range Retargeting: The Color Issue by Alessandro Artusi Dynamic Range Retargeting: Reverse/Inverse Tone Mapping by Francesco Banterle Spatial Image Retargeting by Diego Gutierrez Temporal Image Retargeting by Elmar Eisemann and Karol Myszkowski Quality Metrics by Tunc Aydin Stereo Retargeting by Piotr Didyk","tags":null,"title":"Multidimensional Image Retargeting","type":"publication"},{"authors":["Marco Callieri","Antoni Chica","Matteo Dellepiane","Isaac Besora","Massimiliano Corsini","Jordi Moyés","Guido Ranzuglia","Roberto Scopigno","Pere Brunet"],"categories":null,"content":" ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"61108a340a595de649ffde920fbe2c88","permalink":"http://vcg.isti.cnr.it/publication/2011/CCDBCMRSB11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/CCDBCMRSB11/","section":"publication","summary":" ","tags":null,"title":"Multiscale acquisition and presentation of very large artifacts: The case of Portalada","type":"publication"},{"authors":["Franco Mosca","Andrea Pietrabissa","Fabio Ganovelli","Giuseppe Megali","Nico Pietroni","Giuseppe Turini"],"categories":null,"content":"","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"59371c4dd55001ee3183d08e6d5bf327","permalink":"http://vcg.isti.cnr.it/publication/2011/TPMGPM11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/TPMGPM11/","section":"publication","summary":"In the recent decades robotics and computer science have been gaining more and more relevance in all aspects of our lives. In surgery, for example, they gave birth to procedures, impossible to perform otherwise, like the tele-surgery or the nano-surgery. On this regard, these applied sciences already play an important role in assisting the surgeon both in the operative room and, as a support, in the education of young surgeons, but much work has still to be done. In fact in these last years we have seen an extreme change in the traditional training in surgery and the computer-based simulation is one of the main reason of this shift. The spread of Minimally Invasive Surgery (MIS) has brought major improvements in the quality of healthcare, but it has also increased the complexity of the surgical procedures requiring advanced and highly specialized training systems. Moreover these training procedures need to be reiterated during the operational life of surgeons. Therefore, considering the limited availability of cadavers and the public concern with the non-ethical treatment of animals, the traditional approaches to surgical training are drastically limited encouraging the use of surgical simulators based on virtual environments. Healthcare industries and the scientific community in medicine agree indicating the disruptive potential of the application of Virtual Reality (VR) to the training in the medical field. Therefore the next step is the development of surgical simulators with an high level of realism in order to practice complex procedures in a safe environment. Moreover it is decisive that this evolution is done integrating advanced medical imaging and processing, allowing surgeons to practice simulated interventions on patient specific dataset. The increasing importance of MIS techniques will cause a drastic change in pre-operation planning and basic surgical training. In fact, the features of this kind of surgical approach (the workspace limitation, the 2D vision through a laparoscopic camera and the indirect physical interaction with the patient body) make it possible to use a surgical simulator to train, plan or simulate an intervention, reproducing the visual and tactile feedback of the real surgical procedure on a real patient. This paper presents some research and applicative results on Computer Assisted Surgery (CAS) achieved in the framework of EndoCAS, a newly founded Center of Excellence in Pisa. The research has involved: the development of segmentation algorithms for volumetric datasets, the simulation of bone drilling procedures, the modeling of deformable object cuts and deformations and the simulation of rope interactions during a suture procedure in MIS. All these projects were been developed using a new open source library to support the implementation of techniques for simulating deformable objects. Our purpose is to enhance the surgical training with new improved techniques applied both to the medical imaging and to the computer-based simulation in order to carry the surgical training to a next level of realism.","tags":null,"title":"New techniques for computer-based simulation in surgical training","type":"publication"},{"authors":["Marco Callieri","Paolo Cignoni","Matteo Dellepiane","Guido Ranzuglia","Roberto Scopigno"],"categories":null,"content":" ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"e71739cb72cb1c6e1255539e765b8ad1","permalink":"http://vcg.isti.cnr.it/publication/2011/CCDRS11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/CCDRS11/","section":"publication","summary":" ","tags":null,"title":"Processing a Complex Architectural Sampling with MeshLab: the case of Piazza Della Signoria","type":"publication"},{"authors":["Marco Callieri","Matteo Dellepiane","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"0d6943f6624765757f28f6214b31b76d","permalink":"http://vcg.isti.cnr.it/publication/2011/CDCS11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/CDCS11/","section":"publication","summary":"","tags":null,"title":"Processing sampled 3D data: reconstruction and visualization technologies","type":"publication"},{"authors":["Marco Tarini","Enrico Puppo","Daniele Panozzo","Nico Pietroni","Paolo Cignoni"],"categories":null,"content":" Talk Slides ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"76339979ee62938ba5ee39a9e72258b1","permalink":"http://vcg.isti.cnr.it/publication/2011/TPPPC11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/TPPPC11/","section":"publication","summary":"We present a method for the global parametrization of meshes that preserves alignment to a cross field in input while obtaining a parametric domain made of few coarse axis-aligned rectangular patches,which form an abstract base complex without T-junctions. The method is based on the topological simplification of the cross field in input, followed by global smoothing Talk Slides","tags":null,"title":"Simple Quad Domains for Field Aligned Mesh Parametrization","type":"publication"},{"authors":["Marco Di Benedetto","Massimiliano Corsini","Roberto Scopigno"],"categories":null,"content":" ","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"53f453c86d9306c07a998070fec14213","permalink":"http://vcg.isti.cnr.it/publication/2011/DCS11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/DCS11/","section":"publication","summary":" ","tags":null,"title":"SpiderGL: A Graphics Library for 3D Web Applications","type":"publication"},{"authors":["Matteo Dellepiane","Marco Callieri","Massimiliano Corsini","Roberto Scopigno"],"categories":null,"content":"","date":129384e4,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":129384e4,"objectID":"bc828eb3c65388626fa3b63f8ca21168","permalink":"http://vcg.isti.cnr.it/publication/2011/DCCS11/","publishdate":"2011-01-01T00:00:00Z","relpermalink":"/publication/2011/DCCS11/","section":"publication","summary":"","tags":null,"title":"Using digital 3D models for study and restoration of Cultural Heritage artifacts","type":"publication"},{"authors":["Guillaume Lavoué","Massimiliano Corsini"],"categories":null,"content":" ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"70b0bf61ac43c2ea1c947e97cfcc7cc0","permalink":"http://vcg.isti.cnr.it/publication/2010/LC10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/LC10/","section":"publication","summary":" ","tags":null,"title":"A Comparison of Perceptually-Based Metrics for Objective Evaluation of Geometry Processing","type":"publication"},{"authors":["Matteo Dellepiane","Paolo Cignoni","Marco Tarini","Fabio Ganovelli","Davide Portelli","Roberto Scopigno"],"categories":null,"content":" ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"ee49dd120782722bdb9781d8c7e22fa1","permalink":"http://vcg.isti.cnr.it/publication/2010/PGTCDS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/PGTCDS10/","section":"publication","summary":" ","tags":null,"title":"A framework for User-Assisted Sketch-Based Fitting of Geometric Primitives","type":"publication"},{"authors":["Agostino Bozzo","Daniele Panozzo","Enrico Puppo","Nico Pietroni","Luigi Rocca"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"77bcfdd03b2ec86c94f0801e9753dd73","permalink":"http://vcg.isti.cnr.it/publication/2010/BPPPR10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/BPPPR10/","section":"publication","summary":"We present an improved algorithm for the progressive simplification of quad meshes, which adapts the resolution of the mesh to details of the modeled shape. We extend our previous work, by simplifying the approach and combining it with the concept of Fitmaps. The new algorithm has several advantages: it is simpler and more robust; it does not need a parametrization of the input shape; it is adaptive; and it preserves projectability of the output mesh to the input shape, thus supporting displacement mapping. We present experimental results on a variety of datasets, showing relevant improvement over previous results under several aspects.","tags":null,"title":"Adaptive quad mesh simplification","type":"publication"},{"authors":["Patrick Marais","Roberto Scopigno"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"e2a160e2583a7bd2b9b8e7a08349e344","permalink":"http://vcg.isti.cnr.it/publication/2010/MS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/MS10/","section":"publication","summary":"","tags":null,"title":"Afrigraph 2010 - Proceedings of the 7th International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa","type":"publication"},{"authors":["Nico Pietroni","Marco Tarini","Paolo Cignoni"],"categories":null,"content":" mesh processing\nTalk Slides MeshLab Here some downloadable data for comparisons Here some processed scanned model with color on texture Here some comparison with other parametrization/remeshing methods\nHere some colored by considering isometry\n","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"51afdd29905b87fac8d0f954cb736632","permalink":"http://vcg.isti.cnr.it/publication/2010/PTC10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/PTC10/","section":"publication","summary":"In this paper we propose a robust, automatic technique to build a global hi-quality parameterization of a two-manifold triangular mesh. An adaptively chosen 2D domain of the parameterization is built as par t of the process. The produced parameterization exhibits very low isometric distor tion, because it is globally optimized to preser ve both areas and angles. The domain is a collection of equilateral triangular 2D regions enriched with explicit adjacency relationships (it is abstract in the sense that no 3D embedding is necessary). It is tailored to minimize isometric distor tion, resulting in excellent parameterization qualities, even when meshes with complex shape and topology are mapped into domains composed of a small number of large continuous regions. Moreover, this domain is in turn remapped into a collection of 2D square regions, unlocking many advantages found in quad-based domains (e.g. ease of packing). The technique is tested on a variety of cases, including challenging ones, and compares ver y favorably with known approaches. Talk Slides An open source implementation is made available in our mesh processing system MeshLab . Here some downloadable data for comparisons Here some processed scanned model with color on texture Here some comparison with other parametrization/remeshing methods Here some colored by considering isometry","tags":null,"title":"Almost isometric mesh parameterization through abstract domains","type":"publication"},{"authors":["Roeland Paardekooper","B. Petersson","J. Eriksson","Stefan Lindgren","Matteo Dellepiane","Matias Wallergard","Nicolo Dell Unto"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"92ae32ed423da61927adc88cb6b54106","permalink":"http://vcg.isti.cnr.it/publication/2010/DWDLEPP10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/DWDLEPP10/","section":"publication","summary":"","tags":null,"title":"An Experiment of Integrated Technologies in Digital Archaeology: Creation of New Pipelines to Increase the Perception of Archaeological Data","type":"publication"},{"authors":["Paolo Brivio","Marco Tarini","Paolo Cignoni"],"categories":null,"content":" ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"e0edab79c4f79ebac95c736aaa9d166c","permalink":"http://vcg.isti.cnr.it/publication/2010/BTC10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/BTC10/","section":"publication","summary":"Conventional browsing of image collections use mechanisms such as thumbnails arranged on a regular grid or on a line, often mounted over a scrollable panel. However, this approach does not scale well with the size of the datasets (number of images). In this paper, we propose a new thumbnail-based interface to browse large collections of images. Our approach is based on weighted centroidal anisotropic Voronoi diagrams. A dynamically changing subset of images is represented by thumbnails and shown on the screen. Thumbnails are shaped like general polygons, to better cover screen space, while still reflecting the original aspect ratios or orientation of the represented images. During the browsing process, thumbnails are dynamically rearranged, reshaped and rescaled. The objective is to devote more screen space (more numerous and larger thumbnails) to the parts of the dataset closer to the current region of interest, and progressively lesser away from it, while still making the dataset visible as a whole. During the entire process, temporal coherence is always maintained. GPU implementation easily guarantees the frame rates needed for fully smooth interactivity.\nThree short videos showing the technique in action\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nSome Additional Material\nSlides of the presentation FastForward","tags":null,"title":"Browsing Large Image Datasets through Voronoi Diagrams","type":"publication"},{"authors":["Massimiliano Corsini","Matteo Dellepiane","Ute Dercks","Federico Ponchio","Marco Callieri","Dagmar Keultjes","A. Marinello","Roberto Sigismondi","Roberto Scopigno","Gerhard Wolf"],"categories":null,"content":" ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"04019b8bee56c97aa64f990fa81bae91","permalink":"http://vcg.isti.cnr.it/publication/2010/CDDPCKMSSW10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/CDDPCKMSSW10/","section":"publication","summary":" ","tags":null,"title":"CENOBIUM - Putting together the Romanesque Cloister Capitals of the Mediterranean Region","type":"publication"},{"authors":["Roberto Scopigno","Riccardo Scateni","Paolo Cignoni","Fabio Ganovelli","Stefano Marras"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"282c1df2c64f9b9dc3e180f848ef23ef","permalink":"http://vcg.isti.cnr.it/publication/2010/MGCSS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/MGCSS10/","section":"publication","summary":"","tags":null,"title":"Controlled and Adaptive Mesh Zippering","type":"publication"},{"authors":["Ute Dercks","Matteo Dellepiane","Massimiliano Corsini","Marco Callieri","Bernd Breuckmann","Christiane Bathow","Roberto Scopigno","Roberto Sigismondi"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"7a0eba6dbb5f210ffc5be7a137a913dd","permalink":"http://vcg.isti.cnr.it/publication/2010/BBCCDDSS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/BBCCDDSS10/","section":"publication","summary":"","tags":null,"title":"Documenting and Monitoring Small Fractures on Michelangelo’s David","type":"publication"},{"authors":["Gianpaolo Palma","Massimiliano Corsini","Paolo Cignoni","Roberto Scopigno","Mark Mudge"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"268d6c04da02385ea2c86cb8173609ed","permalink":"http://vcg.isti.cnr.it/publication/2010/PCCSM10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/PCCSM10/","section":"publication","summary":"","tags":null,"title":"Dynamic Shading Enhancement for Reflectance Transformation Imaging","type":"publication"},{"authors":["Ashish Myles","Nico Pietroni","Denis Kovacs","Denis Zorin"],"categories":null,"content":" Talk Slides ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"fbd214b7d3addbdf367cfe9c7d5d71cd","permalink":"http://vcg.isti.cnr.it/publication/2010/MPKZ10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/MPKZ10/","section":"publication","summary":"High-order and regularly sampled surface representations are more efficient and compact than general meshes and considerably simplify many geometric modeling and processing algorithms. A number of recent algorithms for conversion of arbitrary meshes to regularly sampled form (typically quadrangulation) aim to align the resulting mesh with feature lines of the geometry. While resulting in a substantial improvement in mesh quality, feature alignment makes it difficult to obtain coarse regular patch partitions of the mesh. In this paper, we propose an approach to constructing patch layouts consisting of small numbers of quadrilateral patches while maintaining good feature alignment. To achieve this, we use quadrilateral T-meshes, for which the intersection of two faces may not be the whole edge or vertex, but a part of an edge. T-meshes offer more flexibility for reduction of the number of patches and vertices in a base domain while maintaining alignment with geometric features. At the same time, T-meshes retain many desirable features of quadrangulations, allowing construction of high-order representations, easy packing of regularly sampled geometric data into textures, as well as supporting different types of discretizations for physical simulation.\nTalk Slides","tags":null,"title":"Feature-aligned T-meshes","type":"publication"},{"authors":["Gianpaolo Palma","Marco Callieri","Matteo Dellepiane","Massimiliano Corsini","Roberto Scopigno"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"cca15e4a9641aeb096303ac5998f2c66","permalink":"http://vcg.isti.cnr.it/publication/2010/PCDCS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/PCDCS10/","section":"publication","summary":"","tags":null,"title":"Geometry-Aware Video Registration","type":"publication"},{"authors":["Matteo Dellepiane","Marco Callieri","Massimiliano Corsini","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"016d51f96c116be8f10d2e5a30d5b4ae","permalink":"http://vcg.isti.cnr.it/publication/2010/DCCCS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/DCCCS10/","section":"publication","summary":" ","tags":null,"title":"Improved Color Acquisition and Mapping on 3D Models via Flash-Based Photography","type":"publication"},{"authors":["Gianpaolo Palma","Massimiliano Corsini","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"411e94c01ede27b4e2641fb8d1619d61","permalink":"http://vcg.isti.cnr.it/publication/2010/PCDS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/PCDS10/","section":"publication","summary":"","tags":null,"title":"Improving 2D-3D registration by mutual information using gradient maps","type":"publication"},{"authors":["Michele Sottile","Matteo Dellepiane","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"cf6a82c16cad2bb8de6fd477a6271d0d","permalink":"http://vcg.isti.cnr.it/publication/2010/SDCS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/SDCS10/","section":"publication","summary":" ","tags":null,"title":"Mutual Correspondences: an hybrid method for image-to-geometry registration","type":"publication"},{"authors":["Marco Tarini","Nico Pietroni","Paolo Cignoni","Daniele Panozzo","Enrico Puppo"],"categories":null,"content":" Talk Slides Here some downloadable data for comparisons Here some comparison with other quad mesh simplification methods\n","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"266903efe0802ae93a4bcd3ba1899154","permalink":"http://vcg.isti.cnr.it/publication/2010/TPCPP10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/TPCPP10/","section":"publication","summary":"In this paper we present an innovative approach to incremental quad mesh simplification, i.e. the task of producing a low complexity quad mesh starting from a high complexity one. The process is based on a novel set of strictly local operations which preserve quad structure. We show how good tessellation quality (e.g. in terms of vertex valencies) can be achieved by pursuing uniform length and canonical proportions of edges and diagonals. The decimation process is interleaved with smoothing in tangent space. The latter strongly contributes to identify a suitable sequence of local modification operations. The method is naturally extended to manage preservation of feature lines (e.g. creases) and varying (e.g. adaptive) tessellation densities. We also present an original Triangle- to-Quad conversion algorithm that behaves well in terms of geometrical complexity and tessellation quality, which we use to obtain the initial quad mesh from a given triangle mesh Talk Slides Here some downloadable data for comparisons Here some comparison with other quad mesh simplification methods","tags":null,"title":"Practical quad mesh simplification","type":"publication"},{"authors":["Paolo Cignoni","Nico Pietroni","Fabio Ganovelli","Daniele Bernabei","Sumanta Pattanaik","Roberto Scopigno"],"categories":null,"content":" ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"fb87e464c85435dca16e53506f72aa17","permalink":"http://vcg.isti.cnr.it/publication/2010/BGPCPS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/BGPCPS10/","section":"publication","summary":"In this paper we propose a novel technique to perform real-time rendering of translucent inhomogeneous materials, one of the most well known problems of Computer Graphics. The developed technique is based on an adaptive volumetric point sampling, done in a preprocessing stage, which associates to each sample the optical depth for a predefined set of directions. This information is then used by a rendering algorithm that combines the objectís surface rasterization with a ray tracing algorithm, implemented on the graphics processor, to compose the final image. This approach allows us to simulate light scattering phenomena for inhomogeneous isotropic materials in real time with an arbitrary number of light sources. We tested our algorithm by comparing the produced images with the result of ray tracing and showed that the technique is effective.","tags":null,"title":"Real-time Single Scattering Inside Inhomogeneous Materials","type":"publication"},{"authors":["Matteo Dellepiane","Luca Benedetti","Roberto Scopigno"],"categories":null,"content":" ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"d41fdce8bb9982a98857f6099957822d","permalink":"http://vcg.isti.cnr.it/publication/2010/DBS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/DBS10/","section":"publication","summary":" ","tags":null,"title":"Removing shadows for color projection using sun position estimation","type":"publication"},{"authors":["Ruggero Pintus","Enrico Gobbetti","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"cbfd8bc55d19135e80fb4865e16f1217","permalink":"http://vcg.isti.cnr.it/publication/2010/PGCS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/PGCS10/","section":"publication","summary":" ","tags":null,"title":"Shape enhancement for rapid prototyping","type":"publication"},{"authors":["Nico Pietroni","Paolo Cignoni","Miguel A. Otaduy","Roberto Scopigno"],"categories":null,"content":" IEEE Computer Graphics and Applications ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"e6485d619a492bebf0f4e9c437dfc080","permalink":"http://vcg.isti.cnr.it/publication/2010/PCOS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/PCOS10/","section":"publication","summary":"In this survey, we illustrate the different algorithms proposed in literature to synthesize and represent solid textures. Solid textures are an efficient instrument to compactly represent both the external and internal appearance of 3D objects, providing practical advantages with respect to classical 2D texturing. Recently, several methods have been proposed to synthesize solid textures. For some of those, which are commonly referred as procedural, colors are obtained by means of functions that algorithmically encode appearance and structure properties of the texture. Alternatively, example-based methods aim to capture and replicate the appearance as described by a set of input exemplars. Within this framework, we propose a novel classification of solid texture synthesis methods: boundary-independent and boundarydependent methods. In the case of boundary-independent methods, the shape of the object to be textured is irrelevant and texture information can be freely generated for each point in the space. Conversely, boundary-dependent methods conform the synthesis process to the actual shape of the object, so that they can exploit this information to orient and guide the texture generation. For better understanding the different algorithms proposed in the literature, we first provide a short introduction on 2D texture synthesis methods, focusing on the main principles which are also exploited for 3D texture synthesis. We review the different methodologies by considering their strengths and weaknesses, the class of appearances they can successfully synthesize, and failure cases. In particular, we focus our attention on advantages and drawbacks of boundary-independent methods with respect to boundary-dependent ones.\nThis PDF contains the Author version, you can downlaod the original version at IEEE Computer Graphics and Applications","tags":null,"title":"Solid-Texture Synthesis: A Survey","type":"publication"},{"authors":["Marco Di Benedetto","Federico Ponchio","Fabio Ganovelli","Roberto Scopigno"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"43a6c44f8f2245f8cc8deb26941f3200","permalink":"http://vcg.isti.cnr.it/publication/2010/DPGS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/DPGS10/","section":"publication","summary":"","tags":null,"title":"SpiderGL: A JavaScript 3D Graphics Library for Next-Generation WWW","type":"publication"},{"authors":["Marco Callieri","Massimiliano Corsini","Maria Girardi","Cristina Padovani","Andrea Pagni","Giuseppe Pasquinelli","Roberto Scopigno"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"4f98069838cfebd1b15554bce66e44b6","permalink":"http://vcg.isti.cnr.it/publication/2010/CCGPPPS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/CCGPPPS10/","section":"publication","summary":"","tags":null,"title":"The Rognosa Tower in San Gimignano: Digital Acquisition and Structural Analysis","type":"publication"},{"authors":["Luca Baronti","Matteo Dellepiane","Roberto Scopigno"],"categories":null,"content":" ","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"56834528555fdabaed6246dc8ef29f27","permalink":"http://vcg.isti.cnr.it/publication/2010/BDS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/BDS10/","section":"publication","summary":" ","tags":null,"title":"Using Lego pieces for camera calibration: a preliminary study","type":"publication"},{"authors":["Christiane Bathow","Bernd Breuckmann","Roberto Scopigno"],"categories":null,"content":"","date":1262304e3,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1262304e3,"objectID":"bfe8ce9c9ed34f500242d930d79280e2","permalink":"http://vcg.isti.cnr.it/publication/2010/BBS10/","publishdate":"2010-01-01T00:00:00Z","relpermalink":"/publication/2010/BBS10/","section":"publication","summary":"","tags":null,"title":"Verification and Acceptance Tests for High Definition 3D Surface Scanners","type":"publication"},{"authors":["Marco Callieri","Raluca Mihaela Andrei","Marco Di Benedetto","Monica Zoppè","Roberto Scopigno"],"categories":null,"content":" 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The Splitting Cubes is essentially a tessellation algorithm for growing, deformable surface and it can be applied to any method for animating deformable ob jects. In this paper the case of the mesh-free methods (MMs) is considered: in this context, we decribed a practical GPU friendly method, that we named the Extended Visibility criterion, to introduce discontinuities of the deformation.","tags":null,"title":"Splitting Cubes a Fast and Robust technique for Virtual Cutting","type":"publication"},{"authors":["Denis Pitzalis","Paolo Cignoni","M. Menu","G. 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","tags":null,"title":"Portalada: A Virtual Reconstruction of the Entrance of the Ripoll Monastery","type":"publication"},{"authors":["Valentino Fiorin","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1199145600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1199145600,"objectID":"1733186252b71649625e8de3e22a6395","permalink":"http://vcg.isti.cnr.it/publication/2008/FCS08/","publishdate":"2008-01-01T00:00:00Z","relpermalink":"/publication/2008/FCS08/","section":"publication","summary":" ","tags":null,"title":"Practical and robust MLS-based integration of scanned data","type":"publication"},{"authors":["Matteo Dellepiane","Nico Pietroni","Nicolas Tsingos","Manuel Asselot","Roberto Scopigno"],"categories":null,"content":" Talk Slides ","date":1199145600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1199145600,"objectID":"82b09ed0d5041f05efc6ba9486e566e4","permalink":"http://vcg.isti.cnr.it/publication/2008/DPTAS08/","publishdate":"2008-01-01T00:00:00Z","relpermalink":"/publication/2008/DPTAS08/","section":"publication","summary":"Visual fidelity and interactivity are the main goals in Computer Graphics research, but recently also audio is assuming an important role. Binaural rendering can provide extremely pleasing and realistic three-dimensional sound, but to achieve best results it's necessary either to measure or to estimate individual Head Related Transfer Function (HRTF). This function is strictly related to the peculiar features of ears and face of the listener. Recent sound scattering simulation techniques can calculate HRTF starting from an accurate 3D model of a human head. Hence, the use of binaural rendering on large scale (i.e. video games, entertainment) could depend on the possibility to produce a sufficiently accurate 3D model of a human head, starting from the smallest possible input. In this paper we present a completely automatic system, which produces a 3D model of a head starting from simple input data (five photos and some key-points indicated by user). The geometry is generated by extracting information from images and accordingly deforming a 3D dummy to reproduce user head features. The system proves to be fast, automatic, robust and reliable: geometric validation and preliminary assessments show that it can be accurate enough for HRTF calculation.\n\nTalk Slides","tags":null,"title":"Reconstructing head models from photographs for individualized 3D-audio processing","type":"publication"},{"authors":["Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1199145600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1199145600,"objectID":"22ae70604cd8b36405c32a9c56fb7e62","permalink":"http://vcg.isti.cnr.it/publication/2008/CS08/","publishdate":"2008-01-01T00:00:00Z","relpermalink":"/publication/2008/CS08/","section":"publication","summary":"","tags":null,"title":"Sampled 3D models for CH applications: an enabling medium or a technological exercise?","type":"publication"},{"authors":["Massimiliano Corsini","Marco Callieri","Paolo Cignoni"],"categories":null,"content":" ","date":1199145600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1199145600,"objectID":"8d2b4404d1cfcb24f2a1179d31652fed","permalink":"http://vcg.isti.cnr.it/publication/2008/CCC08/","publishdate":"2008-01-01T00:00:00Z","relpermalink":"/publication/2008/CCC08/","section":"publication","summary":" ","tags":null,"title":"Stereo Light Probe","type":"publication"},{"authors":["Olivier Balet","J. 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Compdaer","Enrico Gobbetti","Roberto Scopigno"],"categories":null,"content":"","date":1199145600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1199145600,"objectID":"28e449420e22a13a9c361bdfbd7f2506","permalink":"http://vcg.isti.cnr.it/publication/2008/BDCGS08/","publishdate":"2008-01-01T00:00:00Z","relpermalink":"/publication/2008/BDCGS08/","section":"publication","summary":"","tags":null,"title":"The CRIMSON Project - Simulating Populations in Massive Urban Environments","type":"publication"},{"authors":["Roberto Scopigno"],"categories":null,"content":"","date":1199145600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1199145600,"objectID":"4138b48accf56d209c45896d73bdafb4","permalink":"http://vcg.isti.cnr.it/publication/2008/Sco08a/","publishdate":"2008-01-01T00:00:00Z","relpermalink":"/publication/2008/Sco08a/","section":"publication","summary":"","tags":null,"title":"Three-dimensional digitization: making it easier and extending it to color","type":"publication"},{"authors":["Marco Callieri","Federico Ponchio","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1199145600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1199145600,"objectID":"d118f82cec67f3456c3c11dfc98cc624","permalink":"http://vcg.isti.cnr.it/publication/2008/CPCS08/","publishdate":"2008-01-01T00:00:00Z","relpermalink":"/publication/2008/CPCS08/","section":"publication","summary":" ","tags":null,"title":"Virtual Inspector: a flexible visualizer for dense 3D scanned models","type":"publication"},{"authors":["Hanspeter Pfister","Moritz Bacher","Miriah Meyer","Gael Guennebaud","Christian Ledergerber"],"categories":null,"content":" ","date":1199145600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1199145600,"objectID":"2c1adb13d1a261b25873b09d600d8aa5","permalink":"http://vcg.isti.cnr.it/publication/2008/LGMBP08/","publishdate":"2008-01-01T00:00:00Z","relpermalink":"/publication/2008/LGMBP08/","section":"publication","summary":" ","tags":null,"title":"Volume MLS Ray Casting","type":"publication"},{"authors":["Blazej Kubiak","Nico Pietroni","Fabio Ganovelli","Marco Fratarcangeli"],"categories":null,"content":" ","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"2cf384b59be440d28df20fcb60640e84","permalink":"http://vcg.isti.cnr.it/publication/2007/KPGF07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/KPGF07/","section":"publication","summary":"In this paper, we present a physically based model for real-time simulation of thread dynamics. Our model captures all the relevant aspects of the physics of the thread, including quasi-zero elasticity, bending, torsion and self-collision, and it provides output forces for the haptic feedback. The physical properties are modeled in terms of constraints that are iteratively satisÞed while the numerical integration is carried out through a Verlet scheme. This approach leads to an unconditionally stable, controllable and computationally light simulation. Our results demonstrate the effectiveness of our model, showing the interaction of the thread with other objects in real time and the creation of complex knots.","tags":null,"title":"A Robust Method for Real-Time Thread Simulation","type":"publication"},{"authors":["Clara Baracchini","Marco Callieri","Massimiliano Corsini","Matteo Dellepiane","Ute Dercks","Dagmar Keultjes","Claudio Montani","Matteo Scognamiglio","Roberto Scopigno","Roberto Sigismondi","Gerhard Wolf"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"f2b72442d0fe1bd55abbd33690db079d","permalink":"http://vcg.isti.cnr.it/publication/2007/BCCDDKMSSSW07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/BCCDDKMSSSW07/","section":"publication","summary":"","tags":null,"title":"CENOBIUM Cultural Electronic Network Online: Binding Up Interoperably Usable Multimedia","type":"publication"},{"authors":["Nicolas Tsingos","Carsten Dachsbacher","Silvain Lefebvre","Matteo Dellepiane"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"892010186a725d83fc095868e7d51edb","permalink":"http://vcg.isti.cnr.it/publication/2007/TDLD07a/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/TDLD07a/","section":"publication","summary":"","tags":null,"title":"Extending geometrical acoustics to highy detailed architectural environments","type":"publication"},{"authors":["Roberto Scopigno","Paolo Cignoni","Claudio Montani"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"1df37a667c668245272d840b01453f1d","permalink":"http://vcg.isti.cnr.it/publication/2007/SCM07a/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/SCM07a/","section":"publication","summary":"","tags":null,"title":"High quality digital acquisition and virtual presentation of three-dimensional models","type":"publication"},{"authors":["Roberto Scopigno","Marco Callieri","Claudio Montani"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"3d17e58d1fa3591c6591e85904bb67ad","permalink":"http://vcg.isti.cnr.it/publication/2007/SCM07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/SCM07/","section":"publication","summary":"","tags":null,"title":"Il rilievo digitale tridimensionale, un nuovo strumento di analisi e documentazione per il restauro","type":"publication"},{"authors":["Nicolas Tsingos","Carsten Dachsbacher","Silvain Lefebvre","Matteo Dellepiane"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"d77fc4e4a5ff350b99757388075478f7","permalink":"http://vcg.isti.cnr.it/publication/2007/TDLD07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/TDLD07/","section":"publication","summary":"","tags":null,"title":"Instant sound scattering","type":"publication"},{"authors":["Khoa-Van Nguyen","Matteo Dellepiane","Isabelle Viaud-Delmon","Olivier Warusfel"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"e3dc653c1222dd0b41bb83a0281d41ee","permalink":"http://vcg.isti.cnr.it/publication/2007/NDVW07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/NDVW07/","section":"publication","summary":"","tags":null,"title":"Investigation of auditory-visual integration in VR Environments","type":"publication"},{"authors":["Matteo Dellepiane","Marco Callieri","Federico Ponchio","Roberto Scopigno"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"afb48fedb886681d166e18ad5a979909","permalink":"http://vcg.isti.cnr.it/publication/2007/DCPS07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/DCPS07/","section":"publication","summary":"","tags":null,"title":"Mapping highly detailed color information on extremely dense 3D models: the case of David’s restoration","type":"publication"},{"authors":["Giuseppe Turini","Nico Pietroni","Giuseppe Megali","Andrea Pietrabissa"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"7d9bb242db532fefa3d63bc87882fa04","permalink":"http://vcg.isti.cnr.it/publication/2007/TPMP07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/TPMP07/","section":"publication","summary":"In the recent decades robotics and computer science have been gaining more and more relevance in all aspects of our lives. In surgery, for example, they gave birth to procedures, impossible to perform otherwise, like the tele-surgery or the nano-surgery. On this regard, these applied sciences already play an important role in assisting the surgeon both in the operative room and, as a support, in the education of young surgeons, but much work has still to be done. In fact in these last years we have seen an extreme change in the traditional training in surgery and the computer-based simulation is one of the main reason of this shift. The spread of Minimally Invasive Surgery (MIS) has brought major improvements in the quality of healthcare, but it has also increased the complexity of the surgical procedures requiring advanced and highly specialized training systems. Moreover these training procedures need to be reiterated during the operational life of surgeons. Therefore, considering the limited availability of cadavers and the public concern with the non-ethical treatment of animals, the traditional approaches to surgical training are drastically limited encouraging the use of surgical simulators based on virtual environments. Healthcare industries and the scientific community in medicine agree indicating the disruptive potential of the application of Virtual Reality (VR) to the training in the medical field. Therefore the next step is the development of surgical simulators with an high level of realism in order to practice complex procedures in a safe environment. Moreover it is decisive that this evolution is done integrating advanced medical imaging and processing, allowing surgeons to practice simulated interventions on patient specific dataset. The increasing importance of MIS techniques will cause a drastic change in pre-operation planning and basic surgical training. In fact, the features of this kind of surgical approach (the workspace limitation, the 2D vision through a laparoscopic camera and the indirect physical interaction with the patient body) make it possible to use a surgical simulator to train, plan or simulate an intervention, reproducing the visual and tactile feedback of the real surgical procedure on a real patient. This paper presents some research and applicative results on Computer Assisted Surgery (CAS) achieved in the framework of EndoCAS, a newly founded Center of Excellence in Pisa. The research has involved: the development of segmentation algorithms for volumetric datasets, the simulation of bone drilling procedures, the modeling of deformable object cuts and deformations and the simulation of rope interactions during a suture procedure in MIS. All these projects were been developed using a new open source library to support the implementation of techniques for simulating deformable objects. Our purpose is to enhance the surgical training with new improved techniques applied both to the medical imaging and to the computer-based simulation in order to carry the surgical training to a next level of realism.","tags":null,"title":"New techniques for computer-based simulation in surgical training","type":"publication"},{"authors":["Valentino Fiorin","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"ca01f0d8dab53cb78e1b4f4826ce0b11","permalink":"http://vcg.isti.cnr.it/publication/2007/FCS07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/FCS07/","section":"publication","summary":"","tags":null,"title":"Out-of-core MLS reconstruction","type":"publication"},{"authors":["Roberto Scopigno"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"f9430a922069dd0aff9aeaf13d2f42fc","permalink":"http://vcg.isti.cnr.it/publication/2007/Sco07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/Sco07/","section":"publication","summary":"","tags":null,"title":"Processing methodologies and interactive visualization of 3D scanned architectures","type":"publication"},{"authors":["Paolo Cignoni","Marco Di Benedetto","Fabio Ganovelli","Enrico Gobbetti","Fabio Marton","Roberto Scopigno"],"categories":null,"content":" ","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"c373384c28b002034685afd4317f3096","permalink":"http://vcg.isti.cnr.it/publication/2007/CDGGMS07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/CDGGMS07/","section":"publication","summary":" ","tags":null,"title":"Ray-Casted BlockMaps for Large Urban Models Streaming and Visualization","type":"publication"},{"authors":["Giuseppe Turini","Nico Pietroni","Fabio Ganovelli","Roberto Scopigno"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"49654bd1fa7387041f2e828599f76582","permalink":"http://vcg.isti.cnr.it/publication/2007/TPGS07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/TPGS07/","section":"publication","summary":"In the recent decades robotic and computer science have been gaining more and more relevance in all aspects of our lives. In surgery, for example, they gave birth to procedures that would be impossible to perform otherwise (e.g. tele-surgery, nano-surgery). On this regard, these applied sciences already play an important role in assisting the surgeon both in the operative room and as a support in the education of young surgeons, but much work has still to be done. This paper presents some research and applicative results on Computer Assisted Surgery achieved in the framework of Endocas, a newly founded Center of Excellence in Pisa: A method for segmentation of anatomic parts from 3D dataset able to recover shapes from noisy 3D dataset; A technique for simulating bone drilling using a adaptive decomposition of tetrahedral meshes; A new open source library to support the implementation of techniques for simulating deformable objects.","tags":null,"title":"Techniques for Computer Assisted Surgery","type":"publication"},{"authors":["Nico Pietroni","Miguel A. Otaduy","Bernd Bickel","Fabio Ganovelli","Markus Gross"],"categories":null,"content":" Talk Slides ","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"5bd5a53b88797f48b747b3c217a0d9e3","permalink":"http://vcg.isti.cnr.it/publication/2007/POBGG07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/POBGG07/","section":"publication","summary":"We introduce a new appearance-modeling paradigm for synthesizing the internal structure of a 3D model from photographs of a few cross-sections of a real object. When the internal surfaces of the 3D model are revealed as it is cut, carved, or simply clipped, we synthesize their texture from the input photographs. Our texture synthesis algorithm is best classified as a morphing technique, which efficiently outputs the texture attributes of each surface point on demand. For determining source points and their weights in the morphing algorithm, we propose an interpolation domain based on BSP trees that naturally resembles planar splitting of real objects. In the context of the interpolation domain, we define efficient warping and morphing operations that allow for real-time synthesis of textures. Overall, our modeling paradigm, together with its realization through our texture synthesis algorithm, allow users to author 3D models that reveal highly realistic internal surfaces in a variety of artistic flavors.\nTalk Slides","tags":null,"title":"Texturing Internal Surfaces from a Few Cross Sections","type":"publication"},{"authors":["Matteo Dellepiane","Marco Callieri","Mark Fondersmith","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":" ","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"d9eb78f83030eb2120ec1de50ece3c8b","permalink":"http://vcg.isti.cnr.it/publication/2007/DCFCS07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/DCFCS07/","section":"publication","summary":" ","tags":null,"title":"Using 3D scanning to analyze a proposal for the attribution of a bronze horse to Leonardo da Vinci","type":"publication"},{"authors":["Michele Brunetti","Marco Callieri","Benedetto Pizzo","Claudio Montani","Paolo Pingi","Roberto Scopigno"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"d4266ccc0f3c59ad836a4e17c389a310","permalink":"http://vcg.isti.cnr.it/publication/2007/BCPMPS07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/BCPMPS07/","section":"publication","summary":"","tags":null,"title":"Using 3D scanning to monitor wood deformations and to evaluate preservation strategies","type":"publication"},{"authors":["Massimiliano Corsini","Elisa Drelie Gelasca","Touradj Ebrahimi","Mauro Barni"],"categories":null,"content":"","date":1167609600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1167609600,"objectID":"9221b9839e1b6aa1575d31a8cc93ca61","permalink":"http://vcg.isti.cnr.it/publication/2007/CDEB07/","publishdate":"2007-01-01T00:00:00Z","relpermalink":"/publication/2007/CDEB07/","section":"publication","summary":"","tags":null,"title":"Watermarked 3D Mesh Quality Assessment","type":"publication"},{"authors":["Marco Callieri","Paul Debevec","Jarrel Pair","Roberto Scopigno"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"c366fe9baa02e40f19542f5835341820","permalink":"http://vcg.isti.cnr.it/publication/2006/CDPS06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/CDPS06/","section":"publication","summary":"","tags":null,"title":"A realtime immersive application with realistic lighting: the Parthenon","type":"publication"},{"authors":["Marco Tarini","Paolo Cignoni","Claudio Montani"],"categories":null,"content":" QuteMol\nqutemol.sourceforge.net\n","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"2cfabf3154c670ac7ccc6ecc39221779","permalink":"http://vcg.isti.cnr.it/publication/2006/TCM06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/TCM06/","section":"publication","summary":"The paper presents a set of combined techniques to enhance the real-time visualization of simple or complex molecules (up to order of $10^6$ atoms) space fill mode. The proposed approach includes an innovative technique for efficient computation and storage of ambient occlusion terms, a small set of GPU accelerated procedural impostors for space-fill and ball-and-stick rendering, and novel edge-cueing techniques. As a result, the user's understanding of the three-dimensional structure under inspection is strongly increased (even for still images), while the rendering still occurs in real time.\nThe techniques shown in the above paper are implemented in the open source tool QuteMol freely available at qutemol.sourceforge.net","tags":null,"title":"Ambient occlusion and edge cueing to enhance real time molecular visualization","type":"publication"},{"authors":["Paolo Cignoni","Marco Callieri","Roberto Scopigno","Giorgio Gori","Marida Risaliti"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"ebe0dc2e6c2a1c9effc2feeeb3a3bbb7","permalink":"http://vcg.isti.cnr.it/publication/2006/CCSGR06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/CCSGR06/","section":"publication","summary":"","tags":null,"title":"Beyond manual drafting: a restoration-oriented system","type":"publication"},{"authors":["Enrico Gobbetti","Fabio Marton","Paolo Cignoni","Marco Di Benedetto","Fabio Ganovelli"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"58466666780e31b4c9bae5afe631ae9b","permalink":"http://vcg.isti.cnr.it/publication/2006/GMCDG06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/GMCDG06/","section":"publication","summary":"We describe a compressed multiresolution representation for supporting interactive rendering of very large planar and spherical terrain surfaces. The technique, called Compressed Batched Dynamic Adaptive Meshes (C-BDAM), is an extension of the BDAM and P-BDAM chunked level-of-detail hierarchy. In the C-BDAM approach, all patches share the same regular triangulation connectivity and incrementally encode their vertex attributes using a quantized representation of the difference with respect to values predicted from the coarser level. The structure provides a number of benefits: simplicity of data structures, overall geometric continuity for planar and spherical domains, support for variable resolution input data, management of multiple vertex attributes, efficient compression and fast construction times, ability to support maximum-error metrics, real-time decompression and shaded rendering with configurable variable level-of-detail extraction, and runtime detail synthesis. The efficiency of the approach and the achieved compression rates are demonstrated on a number of test cases, including the interactive visualization of a 29 gigasample reconstruction of the whole planet Earth created from high resolution SRTM data.","tags":null,"title":"C-BDAM - Compressed Batched Dynamic Adaptive Meshes for Terrain Rendering","type":"publication"},{"authors":["Marco Callieri","Federico Ponchio","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"679298db72b1da05129e6dd1a6c5849f","permalink":"http://vcg.isti.cnr.it/publication/2006/CPCS06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/CPCS06/","section":"publication","summary":"","tags":null,"title":"Easy Access to Huge 3D Models of Works of Art","type":"publication"},{"authors":["Roberto Scopigno","Marco Callieri","Massimiliano Corsini","Matteo Dellepiane"],"categories":null,"content":" ","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"4a56720bc75f6e7ab41fb51799cb7e8d","permalink":"http://vcg.isti.cnr.it/publication/2006/DCCS06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/DCCS06/","section":"publication","summary":"Reflection Transformation Imaging has proved to be a powerful method to acquire and represent the 3D reflectance properties of an object, displaying them as a 2D image. Recently, Polynomial Texture Maps (PTM), which are relightable images created from a set of photos of the object taken under several different lighting conditions, have been used in Cultural Heritage field to document and virtually inspect several sets of small objects, such as cuneiform tablets and coins. In this paper we explore the possibility of producing high quality PTM of medium or large size objects. The aim is to analyze the acquisition pipeline, resolving all the issues related to the size of the object, and the conditions of acquisition. We will discuss issues regarding acquisition planning and data gathering. We also present a new tool to interactively browse high resolution PTMs. Moreover, we perform some quality assessment considerations, in order to study the degradation of quality of the PTMs respect to the number and position of lights used to acquire the PTM. The results of our acquisition system are presented with some examples of PTMs of large artifacts like a sarcophagus of 2.4 $\\times$ 1 m size. PTM can be a good alternative to 3D scanning for capturing and representing certain class of objects, like bas-relieves, having lower costs in terms of acquisition equipment and data processing time.","tags":null,"title":"High Quality PTM Acquisition: Reflection Transformation Imaging for Large Objects","type":"publication"},{"authors":["Marcello Balzani","Claudio Montani","Roberto Scopigno"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"cf4a92308cb50d7e115859af24f26945","permalink":"http://vcg.isti.cnr.it/publication/2006/BMSP06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/BMSP06/","section":"publication","summary":"","tags":null,"title":"Il rilievo laser scanner terrestre come integrazione dei sistemi informativi di documentazione storica e di restauro","type":"publication"},{"authors":["Guido Ranzuglia","Paolo Cignoni","Fabio Ganovelli","Roberto Scopigno"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"54ff1b37830b18c4c9a4e3e66f7408dd","permalink":"http://vcg.isti.cnr.it/publication/2006/RCGS06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/RCGS06/","section":"publication","summary":"","tags":null,"title":"Implementing Mesh-Based Approaches for deformable Objects on GPU","type":"publication"},{"authors":["Marcello Balzani","Federico Uccelli","Roberto Scopigno","Claudio Montani"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"68f5d3aa0b788a3ae6128a9472a79459","permalink":"http://vcg.isti.cnr.it/publication/2006/BUSM06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/BUSM06/","section":"publication","summary":"","tags":null,"title":"La Cattedrale di Pisa nella Piazza dei Miracoli: un rilievo 3D per l’integrazione con i sistemi informativi di documentazione storica e di restauro","type":"publication"},{"authors":["Marcello Balzani","Federico Uccelli","Roberto Scopigno","Claudio Montani"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"480dd9d32d27f04bf9f9e48763e1d6fb","permalink":"http://vcg.isti.cnr.it/publication/2006/BUSM06a/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/BUSM06a/","section":"publication","summary":"","tags":null,"title":"La Cattedrale di Pisa: Un rilievo 3D per l'integrazione con i sistemi informativi di documentazione storica e di restauro","type":"publication"},{"authors":["Andrea Spinelli","Fabio Ganovelli","Claudio Montani","Roberto Scopigno"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"8a3bbafb31f765e89a029ab1f6af8c3a","permalink":"http://vcg.isti.cnr.it/publication/2006/SGMS06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/SGMS06/","section":"publication","summary":"","tags":null,"title":"Recovering 3D Architectural Information from Dense Digital Models of Buildings","type":"publication"},{"authors":["Massimiliano Corsini","Matteo Dellepiane","Marco Callieri","Roberto Scopigno"],"categories":null,"content":" ","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"7e5270ab12497f93e7375128145ff6ce","permalink":"http://vcg.isti.cnr.it/publication/2006/CDCS06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/CDCS06/","section":"publication","summary":" ","tags":null,"title":"Reflection Transformation Imaging on Larger Objects: an Alternative Method for Virtual Representation","type":"publication"},{"authors":["Giuseppe Turini","Fabio Ganovelli","Claudio Montani"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"72610e821affbdae39755a4f385b1ba0","permalink":"http://vcg.isti.cnr.it/publication/2006/TGM06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/TGM06/","section":"publication","summary":"Bone drilling is a fundamental task in several surgical procedures, including mastoidectomy, cochlear implantation, orbital surgery. It consists in eroding the part of the bone in contact with the tip of the surgical tool when a sufficient pressure is exerted. Since the bone is an almost rigid material, the bone drilling simulations usually employ voxel-based representations of the bone, so that it is easy to show material removal by playing with material density in the voxels. Unfortunately, there are cases in which drilling is only a part of the task, and parts of the same object are also cut away or, worse, the bone is slightly deformable and therefore voxel-based representations do not work well. We propose a novel method to simulate drilling on objects represented explicitly by means of a tetrahedral mesh. The key idea of our method is to create an alternative representation of the tetrahedron when it is partially eroded. Such representation consists of a set of smaller tetrahedra obtained by a hierarchical decomposition of the original one, and combined to represent the current status of the erosion.","tags":null,"title":"Simulating Drilling on Tetrahedral Meshes","type":"publication"},{"authors":["Gerhard Wolf","Roberto Sigismondi","Roberto Scopigno","Matteo Scognamiglio","Claudio Montani","Dagmar Keultjes","Ute Dercks","Matteo Dellepiane","Massimiliano Corsini","Marco Callieri","Clara Baracchini"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"937d9359a9c5e2c46dc3fd43ad18e04b","permalink":"http://vcg.isti.cnr.it/publication/2006/BCCDDKMSSSW06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/BCCDDKMSSSW06/","section":"publication","summary":"","tags":null,"title":"Starting the CENOBIUM Project: The cloister of Monreale (Sicily) Revealed","type":"publication"},{"authors":["Matteo Dellepiane","Marco Callieri"],"categories":null,"content":"","date":1136073600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1136073600,"objectID":"b3e86372c4c685aab414aac8bfdaf66d","permalink":"http://vcg.isti.cnr.it/publication/2006/DC06/","publishdate":"2006-01-01T00:00:00Z","relpermalink":"/publication/2006/DC06/","section":"publication","summary":"","tags":null,"title":"Visualization of Colour Information on Highly Detailed 3D Models","type":"publication"},{"authors":["Marco Tarini","Hendrik Lensch","Gösele Michael","Hans-Peter Seidel"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"7b0a8c51e9ffa04330f9629a199c6fb1","permalink":"http://vcg.isti.cnr.it/publication/2005/TLMS05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/TLMS05/","section":"publication","summary":"","tags":null,"title":"3D Acquisition of Mirroring Objects using Striped Patterns","type":"publication"},{"authors":["Frank ter Haar","Paolo Cignoni","Patrick Min","Remco Veltkamp"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"aeefc9bedb3038850e47be259e860632","permalink":"http://vcg.isti.cnr.it/publication/2005/TCMV05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/TCMV05/","section":"publication","summary":"","tags":null,"title":"A Comparison of Systems and Tools for 3D Scanning","type":"publication"},{"authors":["Paolo Cignoni","Roberto Scopigno","Marco Tarini"],"categories":null,"content":" ","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"8e3b63e38881fd3bf145991da0e6522d","permalink":"http://vcg.isti.cnr.it/publication/2005/CST05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/CST05/","section":"publication","summary":" ","tags":null,"title":"A simple Normal Enhancement technique for Interactive Non-photorealistic Renderings","type":"publication"},{"authors":["Gaetano Impoco","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"0d0d7e69c2bdb914bc9d39d625c9e180","permalink":"http://vcg.isti.cnr.it/publication/2005/ICS05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/ICS05/","section":"publication","summary":"","tags":null,"title":"A six-degrees-of-freedom planning algorithm for the acquisition of complex surfaces","type":"publication"},{"authors":["Claudio Montani","Roberto Scopigno","Matteo Dellepiane","Fabio Ganovelli","Paolo Cignoni","Thomas Franken"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"c8d3748d09350de35aa78c8e28d0bcdb","permalink":"http://vcg.isti.cnr.it/publication/2005/FCGDSM05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/FCGDSM05/","section":"publication","summary":"","tags":null,"title":"Assisting the user in image to geometry alignment","type":"publication"},{"authors":["Fabio Marton","Enrico Gobbetti","Fabio Ganovelli","Paolo Cignoni","Federico Ponchio","Roberto Scopigno"],"categories":null,"content":" ","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"452e30ddeef62287c20923ebf0823d49","permalink":"http://vcg.isti.cnr.it/publication/2005/CGGMPS05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/CGGMPS05/","section":"publication","summary":" ","tags":null,"title":"Batched Multi Triangulation","type":"publication"},{"authors":["Marco Callieri","Paolo Cignoni","Andrea Fasano","Claudio Montani","Paolo Pingi","Federico Ponchio","Roberto Scopigno"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"a3053c7263ae45e37d548bc2d9b55dc7","permalink":"http://vcg.isti.cnr.it/publication/2005/CCFMPPS05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/CCFMPPS05/","section":"publication","summary":"","tags":null,"title":"Enhancing processing and visualization efficiency of 3D scanned meshes","type":"publication"},{"authors":["Paolo Pingi","Andrea Fasano","Paolo Cignoni","Claudio Montani","Roberto Scopigno"],"categories":null,"content":" ","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"d209d795a61203dbb174ad4cc0f77113","permalink":"http://vcg.isti.cnr.it/publication/2005/PFCMS05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/PFCMS05/","section":"publication","summary":"Range map registration is still the most time consuming phase in the processing of 3D scanning data. This is because real scanning sets are composed of hundreds of range maps and their registration is still partially manual. We propose a new method to manage complex scan sets acquired by following a regular scanner pose pattern. Our goal is to define an initial adjacency graph by coarsely aligning couples of range maps that we know are partially overlapping thanks to the adopted scanning strategy. For a pair of partially overlapping range maps, our iterative solution locates pairs of correspondent vertices through the computation of a regular n×n kernel which takes into account vertex normals and is defined in the 2D space of the range map (represented in implicit 2D format rather than as a triangle mesh in 3D space). The shape-characterization kernel and the metrics defined give a sufficiently accurate shape matching, which has been proven to fit well the requirements of automatic registration. This initial set of adjacency arcs can then be augmented by the automatic identification of the other significant arcs, by adopting a criterion based on approximate range map overlap computation. With respect to the solutions present in literature, the simplifications and assumptions adopted make our solution specifically oriented to complex 3D scanning campaigns (hundreds of range maps). The proposed method can coarsely register range maps in parallel with the acquisition activity and this is a valuable help in assessing on site the completeness of the sampling of large objects.","tags":null,"title":"Exploiting the scanning sequence for automatic registration of large sets of range maps","type":"publication"},{"authors":["Rita Borgo","Matteo Dellepiane","Paolo Cignoni","Laura Papaleo","Michela Spagnuolo"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"8ef1f904978c16771686fe9906f39aa7","permalink":"http://vcg.isti.cnr.it/publication/2005/BDCPS05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/BDCPS05/","section":"publication","summary":"","tags":null,"title":"Extracting Meta-Information From 3-Dimensional Shapes With Protégé","type":"publication"},{"authors":["Riccardo Scateni","Paolo Cignoni","Claudio Montani","Roberto Scopigno"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"50944d678a08aade9a7d6a231081b4d3","permalink":"http://vcg.isti.cnr.it/publication/2005/SCMS05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/SCMS05/","section":"publication","summary":"","tags":null,"title":"Fondamenti di Grafica Tridimensionale Interattiva","type":"publication"},{"authors":["Paolo Cignoni","Claudio Rocchini"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"9d25323900c57b78ce11ffd70b088b1b","permalink":"http://vcg.isti.cnr.it/publication/2005/CR05a/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/CR05a/","section":"publication","summary":"","tags":null,"title":"Generating random points in a tetrahedron","type":"publication"},{"authors":["Roberto Scopigno"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"49331637c04320bb1592816d636ba1cc","permalink":"http://vcg.isti.cnr.it/publication/2005/Sco05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/Sco05/","section":"publication","summary":"","tags":null,"title":"Gestione Efficiente dei Dati Prodotti dai Sistemi di Scansione Tridimensionale","type":"publication"},{"authors":["Clara Baracchini","Andrea Brogi","Marco Callieri","Lucia Capitani","Paolo Cignoni","Andrea Fasano","Claudio Montani","C. Nenci","R. P. Novello","Paolo Pingi","Federico Ponchio","Roberto Scopigno"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"148c07ec17efa5173de2f0ba7dedf379","permalink":"http://vcg.isti.cnr.it/publication/2005/BBCCCFMNNPPS05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/BBCCCFMNNPPS05/","section":"publication","summary":"","tags":null,"title":"Interactive visualization of artwork’s 3D digital reconstruction","type":"publication"},{"authors":["Roberto Scopigno","Claudio Montani","Paolo Cignoni","Fabio Ganovelli","Matteo Dellepiane","Thomas Franken"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"e2a9543984635795b50f380b528f691a","permalink":"http://vcg.isti.cnr.it/publication/2005/FDGCMS05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/FDGCMS05/","section":"publication","summary":"","tags":null,"title":"Minimizing user intervention in registering 2D images to 3D models","type":"publication"},{"authors":["Marco Tarini","Paolo Cignoni"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"3a228b3d63468a95465978a8aee4ae5e","permalink":"http://vcg.isti.cnr.it/publication/2005/TC05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/TC05/","section":"publication","summary":"We introduce a new texture representation that combines standard bi-linearly interpolated samples, for smoothly varying regions, with customizable discontinuities for sharp boundaries between these regions. It consists in a standard signal texture, plus a second texture we call pinchmap, which encodes discontinuities along generally curved lines; this structure is stored in texture memory as a pair of images and is effciently interpreted on commodity graphic hardware in the fragment shader. We also present a fully automatic way to compute a pinchmap and signal texture pair from an much higher resolution image. We show that the final effect on the screen is a comparable visual quality, for a fraction of the texture storage cost and a very small impact on performance.","tags":null,"title":"Pinchmaps: Textures with Customizable Discontinuities","type":"publication"},{"authors":["Roberto Scopigno","Paolo Cignoni"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"85f7702b0cbbb301c3f37c2eb7038191","permalink":"http://vcg.isti.cnr.it/publication/2005/SC05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/SC05/","section":"publication","summary":"","tags":null,"title":"Processing huge scanned datasets: issues and solutions","type":"publication"},{"authors":["Marco Callieri","Paul Debevec","Jarrel Pair","Roberto Scopigno"],"categories":null,"content":"","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"77de5cef868b11e511ae2c805a43f124","permalink":"http://vcg.isti.cnr.it/publication/2005/CDPS05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/CDPS05/","section":"publication","summary":"","tags":null,"title":"Realistic realtime illumination of complex environment for immersive systems a case study: the Parthenon","type":"publication"},{"authors":["Nico Pietroni","Andrea Giachetti","Fabio Ganovelli"],"categories":null,"content":" ","date":1104537600,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1104537600,"objectID":"2220adfb70652921950cab33518cfa1a","permalink":"http://vcg.isti.cnr.it/publication/2005/PGG05/","publishdate":"2005-01-01T00:00:00Z","relpermalink":"/publication/2005/PGG05/","section":"publication","summary":"Computer assisted medical applications require often the reconstruction of anatomical structures to compute parameters useful for diagnosis or interventional planning. From CT and MRI datasets it is possible to obtain surface models of the organs of interest with a variety of algorithms, like Marching Cubes, level sets or deformable parametric surfaces. Each technique has advantages but also drawbacks like noise sensitivity (isosurface extraction), risk of leakages (level sets), oversmoothing and impossible handling of topological changes (Deformable models). To obtain a good trade-off between robustness, shape constraints and topological control, we propose a 3D balloon/isosurface method joining the advantages in curvature control, leakage penalization and efficiency of parametric surfaces with a fast re-parametrization handling topological changes. It is based on the control of surface self-intersections, freezing of the intersected nodes and replacement of the final mesh with an isosurface computed on a field representing the signed distance from the true surface.","tags":null,"title":"Robust segmentation of anatomical structures with deformable surfaces and marching cubes","type":"publication"},{"authors":["Michael S. 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Gambino","Raffaella Fontana","Marinella Greco","E Pampaloni","Luca Pezzati","Paolo Pingi","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1041379200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1041379200,"objectID":"54dcceb6016cea6ece7841252e4d1856","permalink":"http://vcg.isti.cnr.it/publication/2003/GFGPPPCS03/","publishdate":"2003-01-01T00:00:00Z","relpermalink":"/publication/2003/GFGPPPCS03/","section":"publication","summary":"","tags":null,"title":"Supporting the restoration of the Minerva of Arezzo","type":"publication"},{"authors":["Roberto Scopigno","Paolo Cignoni","Marco Callieri","Fabio Ganovelli","Gaetano Impoco","Paolo Pingi","Federico Ponchio"],"categories":null,"content":"","date":1041379200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1041379200,"objectID":"9e1e1afcdc2ad88fc538cf39446f0ccc","permalink":"http://vcg.isti.cnr.it/publication/2003/SCCGIPP03/","publishdate":"2003-01-01T00:00:00Z","relpermalink":"/publication/2003/SCCGIPP03/","section":"publication","summary":"","tags":null,"title":"Using optically scanned 3D data in the restoration of Michelangelo David","type":"publication"},{"authors":["Marco Callieri","Paolo Cignoni","Fabio Ganovelli","Claudio Montani","Paolo Pingi","Roberto Scopigno"],"categories":null,"content":"","date":1041379200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1041379200,"objectID":"f3d42b8756d25dbeb69acc1affbe802f","permalink":"http://vcg.isti.cnr.it/publication/2003/CCGMPS03/","publishdate":"2003-01-01T00:00:00Z","relpermalink":"/publication/2003/CCGMPS03/","section":"publication","summary":"","tags":null,"title":"VCLab Tools for 3D range data processing","type":"publication"},{"authors":["Marco Tarini","Paolo Cignoni","Roberto Scopigno"],"categories":null,"content":"","date":1041379200,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":1041379200,"objectID":"7a46b1e6eb1d2e97916c4066cbd43910","permalink":"http://vcg.isti.cnr.it/publication/2003/TCS03/","publishdate":"2003-01-01T00:00:00Z","relpermalink":"/publication/2003/TCS03/","section":"publication","summary":"","tags":null,"title":"Visibility based methods and assessment for detail-recovery","type":"publication"},{"authors":null,"categories":null,"content":"","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"6fcae98d7df3b6c44952e7b5fed181e3","permalink":"http://vcg.isti.cnr.it/software/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/software/","section":"","summary":"","tags":null,"title":"","type":"widget_page"},{"authors":["Paolo Cignoni"],"categories":null,"content":"lorem ipsum\n","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"4cfb8ee9140fcddb260ef09e1a619973","permalink":"http://vcg.isti.cnr.it/courses/geometry/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/courses/geometry/","section":"courses","summary":"lorem ipsum","tags":null,"title":"3D GEOMETRIC MODELING \u0026 PROCESSING 2021/2022","type":"courses"},{"authors":["Marco Callieri","Marco Potenziani"],"categories":["web"],"content":"","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"56e9120cb600c65c38952d3e7128b63d","permalink":"http://vcg.isti.cnr.it/software_apps/3dhop/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/software_apps/3dhop/","section":"software_apps","summary":"3DHOP _(3D Heritage Online Presenter)_ is an open-source framework for the creation of interactive Web presentations of high-resolution 3D models, oriented to the Cultural Heritage field. 3DHOP target audience ranges from the museum curators with some IT experience to the experienced Web designers who want to embed 3D contents in their creations, from students in the CH field to small companies developing web applications for museum and CH institutions.","tags":["Web"],"title":"3DHOP","type":"software_apps"},{"authors":["Francesco Laccone"],"categories":null,"content":"VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects. Activity on 3D acquisition started at VC Lab on mid ’90s; we have designed a low-cost 3D scanner and proposed many new algorithms for processing sampled 3D data.\nMost of those results later on have been incorporated in the MeshLab system, together with other geometry processing results. MeshLab is an open source system for processing and editing 3D triangular meshes; it has more than 10 years of life and a very consolidated and wide community of users (totalling more than 100,000 download every year).\nWe have been also active on some advanced 2D media, such as the Reflection Transformation Images (RTI):\nWe present below links and brief presentation of some recent results.\n","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"58618d810dab07a63290f26e47433b45","permalink":"http://vcg.isti.cnr.it/research/architecture/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/research/architecture/","section":"research","summary":"VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects.","tags":["Architectural Geometry"],"title":"Architectural Geometry","type":"research"},{"authors":["Fabio Ganovelli"],"categories":null,"content":"lorem ipsum\n","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"31f06242dc96208d5282bc4b42a4cdec","permalink":"http://vcg.isti.cnr.it/courses/computer_graphics/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/courses/computer_graphics/","section":"courses","summary":"lorem ipsum","tags":null,"title":"COMPUTER GRAPHICS 2022/2023","type":"courses"},{"authors":["Luigi Malomo"],"categories":null,"content":"VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects. Activity on 3D acquisition started at VC Lab on mid ’90s; we have designed a low-cost 3D scanner and proposed many new algorithms for processing sampled 3D data.\n","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"2efb2ff5abc48a2c4e60d6447ca78016","permalink":"http://vcg.isti.cnr.it/research/digital-fabrication/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/research/digital-fabrication/","section":"research","summary":"VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects.","tags":null,"title":"Digital Fabrication","type":"widget_page"},{"authors":["Marco Callieri"],"categories":null,"content":"VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects. Activity on 3D acquisition started at VC Lab on mid ’90s; we have designed a low-cost 3D scanner and proposed many new algorithms for processing sampled 3D data.\nMost of those results later on have been incorporated in the MeshLab system, together with other geometry processing results. MeshLab is an open source system for processing and editing 3D triangular meshes; it has more than 10 years of life and a very consolidated and wide community of users (totalling more than 100,000 download every year).\nWe have been also active on some advanced 2D media, such as the Reflection Transformation Images (RTI):\nWe present below links and brief presentation of some recent results.\n","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"183c8a8fb8429babf6393ac86f20bf52","permalink":"http://vcg.isti.cnr.it/research/digitization/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/research/digitization/","section":"research","summary":"VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects.","tags":null,"title":"Digital Heritage","type":"research"},{"authors":["Massimiliano Corsini","gaia-pavoni"],"categories":null,"content":"Our activity on Geometry Processing includes methodologies for shape analysis and characterization, mesh parametrization and its applications. First, we aim to apply such techniques for re-meshing, compression and visualization.\n","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"6ff2cbb4d9694e38d4ca6993465301e9","permalink":"http://vcg.isti.cnr.it/research/environment-monitoring/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/research/environment-monitoring/","section":"research","summary":"Our activity on Geometry Processing includes methodologies for shape analysis and characterization, mesh parametrization and its applications. First, we aim to apply such techniques for re-meshing, compression and visualization.","tags":null,"title":"Environment Monitoring","type":"research"},{"authors":["Paolo Cignoni"],"categories":null,"content":"Our activity on Geometry Processing includes methodologies for shape analysis and characterization, mesh parametrization and its applications. First, we aim to apply such techniques for re-meshing, compression and visualization.\n","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"a34b7ccfbf374ebbd2e26ee895a687d3","permalink":"http://vcg.isti.cnr.it/research/geometry-processing/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/research/geometry-processing/","section":"research","summary":"Our activity on Geometry Processing includes methodologies for shape analysis and characterization, mesh parametrization and its applications. First, we aim to apply such techniques for re-meshing, compression and visualization.","tags":null,"title":"Geometry Processing","type":"research"},{"authors":["Matteo Bracci","Marco Tarini","Nico Pietroni","Marco Livesu","Paolo Cignoni"],"categories":["web"],"content":"","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"fd7e64cc19854c5cbd874753be288270","permalink":"http://vcg.isti.cnr.it/software_apps/hexalab/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/software_apps/hexalab/","section":"software_apps","summary":"HexaLab is a WebGL application for real time visualization, exploration and assessment of hexahedral meshes. This visualization tool targets both users and scholars. Practitioners who employ hexmeshes for Finite Element Analysis, can readily check mesh quality and assess its usability for simulation. Researchers involved in mesh generation may use HexaLab to perform a detailed analysis of the mesh structure, isolating weak points and testing new solutions to improve on the state of the art and generate high quality images. The system also offers immediate access to a repository containing all the publicly available meshes produced with the most recent techniques for hex mesh generation.","tags":["Web"],"title":"HexaLab","type":"software_apps"},{"authors":[],"categories":[],"content":"","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"c9849d28327f171e7481837e948b3187","permalink":"http://vcg.isti.cnr.it/software_apps/meshlab/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/software_apps/meshlab/","section":"software_apps","summary":"MeshLab is an open source, portable, and extensible system for the processing and editing of unstructured 3D triangular meshes. It also supports processing of raw data produced with 3D digitization tools/devices, providing a set of tools for editing, cleaning, healing, inspecting, rendering, texturing and converting this kind of models.","tags":[],"title":"MeshLab","type":"software_apps"},{"authors":null,"categories":null,"content":"","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"c1d17ff2b20dca0ad6653a3161942b64","permalink":"http://vcg.isti.cnr.it/people/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/people/","section":"","summary":"","tags":null,"title":"People","type":"landing"},{"authors":["Alessandro Muntoni","Paolo Cignoni"],"categories":[],"content":"","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"d2cff9ea49f6c76a84540b9562d6f318","permalink":"http://vcg.isti.cnr.it/software_libs/pymeshlab/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/software_libs/pymeshlab/","section":"software_libs","summary":"","tags":["software","libraries"],"title":"PyMeshLab","type":"software_libs"},{"authors":null,"categories":null,"content":"","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"c29e41198fe1dc5c85e66dbe4f2d7737","permalink":"http://vcg.isti.cnr.it/results/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/results/","section":"","summary":"","tags":null,"title":"Results","type":"widget_page"},{"authors":[],"categories":[],"content":"","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"b243a047f27846d321e3f7f2d813d77c","permalink":"http://vcg.isti.cnr.it/software_libs/vcglib/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/software_libs/vcglib/","section":"software_libs","summary":"","tags":[],"title":"VCGLib","type":"software_libs"},{"authors":["Daniela Giorgi"],"categories":null,"content":"Our activity on Geometry Processing includes methodologies for shape analysis and characterization, mesh parametrization and its applications. First, we aim to apply such techniques for re-meshing, compression and visualization.\n","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"e7ed0690bc4adad96ee4d7241a53f0d5","permalink":"http://vcg.isti.cnr.it/research/visual-learning/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/research/visual-learning/","section":"research","summary":"Our activity on Geometry Processing includes methodologies for shape analysis and characterization, mesh parametrization and its applications. First, we aim to apply such techniques for re-meshing, compression and visualization.","tags":null,"title":"Visual Learning","type":"research"},{"authors":["Gianpaolo Palma"],"categories":null,"content":"Our activity on Geometry Processing includes methodologies for shape analysis and characterization, mesh parametrization and its applications. First, we aim to apply such techniques for re-meshing, compression and visualization.\n","date":-62135596800,"expirydate":-62135596800,"kind":"page","lang":"en","lastmod":-62135596800,"objectID":"61ca8d5d1cc520690da2e3f7ec30b4cd","permalink":"http://vcg.isti.cnr.it/research/xr-advanced-ui/","publishdate":"0001-01-01T00:00:00Z","relpermalink":"/research/xr-advanced-ui/","section":"research","summary":"Our activity on Geometry Processing includes methodologies for shape analysis and characterization, mesh parametrization and its applications. First, we aim to apply such techniques for re-meshing, compression and visualization.","tags":null,"title":"XR and Advanced UI","type":"research"}] \ No newline at end of file diff --git a/index.xml b/index.xml index b2304443fe..44229e740f 100644 --- a/index.xml +++ b/index.xml @@ -1642,10 +1642,7 @@ </div></figure>PSP: A Progressive Subdivision Paradigmhttp://vcg.isti.cnr.it/publication/2004/BSCP04/Thu, 01 Jan 2004 00:00:00 +0000http://vcg.isti.cnr.it/publication/2004/BSCP04/Restoring David using 3Dhttp://vcg.isti.cnr.it/publication/2004/CCGIMPPS04a/Thu, 01 Jan 2004 00:00:00 +0000http://vcg.isti.cnr.it/publication/2004/CCGIMPPS04a/RoboScan: An automatic system for accurate and unattended 3D scanninghttp://vcg.isti.cnr.it/publication/2004/CFICSPB04/Thu, 01 Jan 2004 00:00:00 +0000http://vcg.isti.cnr.it/publication/2004/CFICSPB04/Selective Refinement Queries for Volume Visualization of Unstructured Tetrahedral Mesheshttp://vcg.isti.cnr.it/publication/2004/CMDPS04/Thu, 01 Jan 2004 00:00:00 +0000http://vcg.isti.cnr.it/publication/2004/CMDPS04/Simplicial-based Multiresolution Volume Datasets Management: An Overviewhttp://vcg.isti.cnr.it/publication/2004/BCS04/Thu, 01 Jan 2004 00:00:00 +0000http://vcg.isti.cnr.it/publication/2004/BCS04/The Marching Intersections Algorithm for Merging Range Imageshttp://vcg.isti.cnr.it/publication/2004/RCGMPS04/Thu, 01 Jan 2004 00:00:00 +0000http://vcg.isti.cnr.it/publication/2004/RCGMPS04/Visualization and 3D data processing in David’s restorationhttp://vcg.isti.cnr.it/publication/2004/CCGIMPPS04/Thu, 01 Jan 2004 00:00:00 +0000http://vcg.isti.cnr.it/publication/2004/CCGIMPPS04/Batching Meshes for High Performance Terrain Visualizationhttp://vcg.isti.cnr.it/publication/2003/CGGMPS03b/Wed, 01 Jan 2003 00:00:00 +0000http://vcg.isti.cnr.it/publication/2003/CGGMPS03b/BDAM: Batched Dynamic Adaptive Meshes for High Performance Terrain Visualizationhttp://vcg.isti.cnr.it/publication/2003/CGGMPS03a/Wed, 01 Jan 2003 00:00:00 +0000http://vcg.isti.cnr.it/publication/2003/CGGMPS03a/Derma: monitoring the evolution of skin lesions with a 3D systemhttp://vcg.isti.cnr.it/publication/2003/CCCPRS03/Wed, 01 Jan 2003 00:00:00 +0000http://vcg.isti.cnr.it/publication/2003/CCCPRS03/Enhancing the 3D Laser Scanning Pipeline using Mirrorshttp://vcg.isti.cnr.it/publication/2003/FCCS03a/Wed, 01 Jan 2003 00:00:00 +0000http://vcg.isti.cnr.it/publication/2003/FCCS03a/Exploiting Mirrors for Laser Stripe 3D Scanninghttp://vcg.isti.cnr.it/publication/2003/FCCS03/Wed, 01 Jan 2003 00:00:00 +0000http://vcg.isti.cnr.it/publication/2003/FCCS03/External Memory Management and Simplification of Huge Mesheshttp://vcg.isti.cnr.it/publication/2003/CRMS03/Wed, 01 Jan 2003 00:00:00 +0000http://vcg.isti.cnr.it/publication/2003/CRMS03/Fast Tetrahedron-Tetrahedron overlap Algorithmhttp://vcg.isti.cnr.it/publication/2003/GPR03/Wed, 01 Jan 2003 00:00:00 +0000http://vcg.isti.cnr.it/publication/2003/GPR03/Il modello digitale 3D del David e il suo uso nel progetto di restaurohttp://vcg.isti.cnr.it/publication/2003/SCCGMP03/Wed, 01 Jan 2003 00:00:00 +0000http://vcg.isti.cnr.it/publication/2003/SCCGMP03/Planet-sized batched dynamic adaptive meshes (P-BDAM)http://vcg.isti.cnr.it/publication/2003/CGGMPS03/Wed, 01 Jan 2003 00:00:00 +0000http://vcg.isti.cnr.it/publication/2003/CGGMPS03/PSP: Progressive Subdivision Paradigm for Large Scale Visualizationhttp://vcg.isti.cnr.it/publication/2003/BSCP03/Wed, 01 Jan 2003 00:00:00 +0000http://vcg.isti.cnr.it/publication/2003/BSCP03/Supporting the restoration of the Minerva of Arezzohttp://vcg.isti.cnr.it/publication/2003/GFGPPPCS03/Wed, 01 Jan 2003 00:00:00 +0000http://vcg.isti.cnr.it/publication/2003/GFGPPPCS03/Using optically scanned 3D data in the restoration of Michelangelo Davidhttp://vcg.isti.cnr.it/publication/2003/SCCGIPP03/Wed, 01 Jan 2003 00:00:00 +0000http://vcg.isti.cnr.it/publication/2003/SCCGIPP03/VCLab Tools for 3D range data processinghttp://vcg.isti.cnr.it/publication/2003/CCGMPS03/Wed, 01 Jan 2003 00:00:00 +0000http://vcg.isti.cnr.it/publication/2003/CCGMPS03/Visibility based methods and assessment for detail-recoveryhttp://vcg.isti.cnr.it/publication/2003/TCS03/Wed, 01 Jan 2003 00:00:00 +0000http://vcg.isti.cnr.it/publication/2003/TCS03/<link>http://vcg.isti.cnr.it/admin/config.yml</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>http://vcg.isti.cnr.it/admin/config.yml</guid><description/></item><item><title/><link>http://vcg.isti.cnr.it/software/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>http://vcg.isti.cnr.it/software/</guid><description/></item><item><title>3D GEOMETRIC MODELING & PROCESSING 2021/2022http://vcg.isti.cnr.it/courses/geometry/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/courses/geometry/<p>lorem ipsum</p>3DHOPhttp://vcg.isti.cnr.it/software_apps/3dhop/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/software_apps/3dhop/Architectural Geometryhttp://vcg.isti.cnr.it/research/architecture/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/research/architecture/<p>VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects. Activity on 3D acquisition started at VC Lab on mid &rsquo;90s; we have designed a low-cost 3D scanner and proposed many new algorithms for processing sampled 3D data.</p> <p>Most of those results later on have been incorporated in the MeshLab system, together with other geometry processing results. MeshLab is an open source system for processing and editing 3D triangular meshes; it has more than 10 years of life and a very consolidated and wide community of users (totalling more than 100,000 download every year).</p> <p>We have been also active on some advanced 2D media, such as the Reflection Transformation Images (RTI):</p> -<p>We present below links and brief presentation of some recent results.</p>COMPUTER GRAPHICS 2022/2023http://vcg.isti.cnr.it/courses/computer_graphics/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/courses/computer_graphics/<p>lorem ipsum</p>Digital Fabricationhttp://vcg.isti.cnr.it/research/digital-fabrication/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/research/digital-fabrication/<p>VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects. Activity on 3D acquisition started at VC Lab on mid &rsquo;90s; we have designed a low-cost 3D scanner and proposed many new algorithms for processing sampled 3D data.</p> -<p>Most of those results later on have been incorporated in the MeshLab system, together with other geometry processing results. MeshLab is an open source system for processing and editing 3D triangular meshes; it has more than 10 years of life and a very consolidated and wide community of users (totalling more than 100,000 download every year).</p> -<p>We have been also active on some advanced 2D media, such as the Reflection Transformation Images (RTI):</p> -<p>We present below links and brief presentation of some recent results.</p>Digital Heritagehttp://vcg.isti.cnr.it/research/digitization/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/research/digitization/<p>VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects. Activity on 3D acquisition started at VC Lab on mid &rsquo;90s; we have designed a low-cost 3D scanner and proposed many new algorithms for processing sampled 3D data.</p> +<p>We present below links and brief presentation of some recent results.</p>COMPUTER GRAPHICS 2022/2023http://vcg.isti.cnr.it/courses/computer_graphics/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/courses/computer_graphics/<p>lorem ipsum</p>Digital Fabricationhttp://vcg.isti.cnr.it/research/digital-fabrication/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/research/digital-fabrication/<p>VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects. Activity on 3D acquisition started at VC Lab on mid &rsquo;90s; we have designed a low-cost 3D scanner and proposed many new algorithms for processing sampled 3D data.</p>Digital Heritagehttp://vcg.isti.cnr.it/research/digitization/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/research/digitization/<p>VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects. Activity on 3D acquisition started at VC Lab on mid &rsquo;90s; we have designed a low-cost 3D scanner and proposed many new algorithms for processing sampled 3D data.</p> <p>Most of those results later on have been incorporated in the MeshLab system, together with other geometry processing results. MeshLab is an open source system for processing and editing 3D triangular meshes; it has more than 10 years of life and a very consolidated and wide community of users (totalling more than 100,000 download every year).</p> <p>We have been also active on some advanced 2D media, such as the Reflection Transformation Images (RTI):</p> <p>We present below links and brief presentation of some recent results.</p>Environment Monitoringhttp://vcg.isti.cnr.it/research/environment-monitoring/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/research/environment-monitoring/<p>Our activity on Geometry Processing includes methodologies for shape analysis and characterization, mesh parametrization and its applications. First, we aim to apply such techniques for re-meshing, compression and visualization.</p>Geometry Processinghttp://vcg.isti.cnr.it/research/geometry-processing/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/research/geometry-processing/<p>Our activity on Geometry Processing includes methodologies for shape analysis and characterization, mesh parametrization and its applications. First, we aim to apply such techniques for re-meshing, compression and visualization.</p>HexaLabhttp://vcg.isti.cnr.it/software_apps/hexalab/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/software_apps/hexalab/MeshLabhttp://vcg.isti.cnr.it/software_apps/meshlab/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/software_apps/meshlab/Peoplehttp://vcg.isti.cnr.it/people/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/people/PyMeshLabhttp://vcg.isti.cnr.it/software_libs/pymeshlab/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/software_libs/pymeshlab/Resultshttp://vcg.isti.cnr.it/results/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/results/VCGLibhttp://vcg.isti.cnr.it/software_libs/vcglib/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/software_libs/vcglib/Visual Learninghttp://vcg.isti.cnr.it/research/visual-learning/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/research/visual-learning/<p>Our activity on Geometry Processing includes methodologies for shape analysis and characterization, mesh parametrization and its applications. First, we aim to apply such techniques for re-meshing, compression and visualization.</p>XR and Advanced UIhttp://vcg.isti.cnr.it/research/xr-advanced-ui/Mon, 01 Jan 0001 00:00:00 +0000http://vcg.isti.cnr.it/research/xr-advanced-ui/<p>Our activity on Geometry Processing includes methodologies for shape analysis and characterization, mesh parametrization and its applications. First, we aim to apply such techniques for re-meshing, compression and visualization.</p> \ No newline at end of file diff --git a/publication/journal-article/index.html b/publication/journal-article/index.html index 48f7acabda..9dcdec2596 100644 --- a/publication/journal-article/index.html +++ b/publication/journal-article/index.html @@ -5,7 +5,7 @@ - September 2015
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Architectural Geometry

Francesco Laccone

VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects. Activity on 3D acquisition started at VC Lab on mid ’90s; we have designed a low-cost 3D scanner and proposed many new algorithms for processing sampled 3D data.

Most of those results later on have been incorporated in the MeshLab system, together with other geometry processing results. MeshLab is an open source system for processing and editing 3D triangular meshes; it has more than 10 years of life and a very consolidated and wide community of users (totalling more than 100,000 download every year).

We have been also active on some advanced 2D media, such as the Reflection Transformation Images (RTI):

We present below links and brief presentation of some recent results.

Francesco Laccone
Francesco Laccone
Pos-Doc Researcher

Digital Technologies for Cultural Heritage

Digital Fabrication

Luigi Malomo

VC Lab has a strong tradition in the context of 3D Scanning. This was exploited both in creating tools for data processing and visualization of data, and in practical experience in the context of important acquisition campaigns and several pioneering international projects. Activity on 3D acquisition started at VC Lab on mid ’90s; we have designed a low-cost 3D scanner and proposed many new algorithms for processing sampled 3D data.

Most of those results later on have been incorporated in the MeshLab system, together with other geometry processing results. MeshLab is an open source system for processing and editing 3D triangular meshes; it has more than 10 years of life and a very consolidated and wide community of users (totalling more than 100,000 download every year).

We have been also active on some advanced 2D media, such as the Reflection Transformation Images (RTI):

We present below links and brief presentation of some recent results.

Luigi Malomo
Luigi Malomo
Researcher

Computational Fabrication