PDFIMAGES

The pdfimages is a utility program that converts a PDF file into a list of images (each page is converted into an image) and vice versa, a list of image files into a PDF document. It has been useful for me several times to send manually signed documents (get the PDF, in some pages use gimp or another program to add the extra data, sign with the pencil tool,... and re-create the PDF again). Apache pdfbox is used to manage PDF files.

Usage

1. Package the program with all the dependencies:

mvn clean package assembly:single

2. The utility has a short usage:

java -jar pdfimages.jar pdf2images [options] file.pdf [image-prefix]
  Transforms the pdf in a series of images one per page.
  Options:
  --dpi -d dpi: DPIs of the image to produce (default 150)
  --format -f format: format of the image supported by ImageIO.
    * jpg (default)
    * bmp
    * gif
    * png
    * wbmp
    * jpeg
  --type -t type: ImageType to produce.
    * BINARY
    * GRAY
    * RGB (default)
    * ARGB

java -jar pdfimages.jar images2pdf image1 image2 ... file.pdf
  Converts the images in a PDF file, one image per page.

3. Convert a PDF file into a list of image files (by default the same file name is used for images without the extension):

java -jar target/pdfimages-0.1.0-jar-with-dependencies.jar pdf2images file.pdf

4. Convert the resulting images back into a PDF document:

java -jar target/pdfimages-0.1.0-jar-with-dependencies.jar images2pdf file.0.jpg new-file.pdf