accessible.tips/content/tips/art-convert-pdf-coloring-pages.md

title	author	publishDate	lastMod	toc	draft	categories	tags	changelog
Converting PDF Coloring Pages	KemoNine	2023-03-23	2023-03-23	true	false	tips art	coloring	date text 2023-03-23 Initial creation

Required Program

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

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Notes

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• 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.

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Conversion

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

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External Resources

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• https://stackoverflow.com/questions/50006770/how-to-get-dpi-of-a-pdf-file
• https://jdhao.github.io/2019/11/20/convert_pdf_to_image_imagemagick/
• https://stackoverflow.com/questions/2869908/convert-pdf-to-png-using-imagemagick
• https://legacy.imagemagick.org/discourse-server/viewtopic.php?t=11279

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