If you have access to imagemagick you can quickly convert a PDF coloring page(s) to grayscale PNG using the below procedure and notes.


  • The pdfimages will get you a dpi listing for each page in the PDF that has an image, use that value instead of 300 in the below, if it is present.
  • The -type Grayscale parameter can be removed if you need color output.


  1. Install imagemagick
  2. pdfimages -list shipspage1.pdf
  3. for file in `ls *.pdf`; do convert -density 300 -type Grayscale ${file} ${file}.png; done


See also