How to extract diagrams in research papers?

[Show-han]

I'd like to extract diagrams, which include several curves and rects, but not images, in research papers.
This kinds of diagrams are as follows

and

and

If I treated them as images, they can't be extracted correctly. So how can I extract them to a file? If possible, I want to reserve the entire information of these diagrams so that I can regenerate them in another PDF file.

[jsvine]

Hi @Show-han, and thanks for your interest in this library. Identifying the full extent of a figure could be a complex / non-trivial task, given that different PDFs may have very different approaches to displaying / rendering them. But once identified, you could extract the visual representation of the diagrams via my_page.crop((x0, top, x1, bottom)).to_image().save("my/diagram/path.png").

Does that answer your question? If not, could you provide more specifics?