digital-art-composition-book/Notes/Convert PDF Coloring Pages.md

tags	created_at	source
note	2023-02-17	KemoNine Blog

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Important Note

Krita can natively import PDFs with each page as a layer. You can simply open the PDF within Krita and then cut/copy/paste each later into a new image as appropriate or work with them as a single image.

The above approch with Krita can be significantly easier and less fiddly than the below.

The original blog post...

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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.

Notes

• The pdfimages command below 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.
• If the below fails Adobe has an online converter at: https://www.adobe.com/acrobat/online/convert-pdf.html

Conversion

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

Resources

• 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