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June 21, 2023 21:36
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make an image look like it was scanned
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| # separate pdf pages | |
| convert -density 400 doc.pdf page-%0d.jpg | |
| # use gimp to insert the signature at the right place at the right page, remove unnecessary pages etc | |
| # scan | |
| for F in page*jpg; do | |
| convert -resize 1800x1800 -density 95 -flatten "$F" -rotate "0.$(( ( RANDOM % 2 ) + 3 ))" +repage -attenuate "0.$(( ( RANDOM % 8 ) + 20 ))" +noise Gaussian -quality 85 -compress JPEG -colorspace gray "$F-scanned.jpg" | |
| done | |
| # combine the pages into a pdf | |
| convert *scanned.jpg scan.pdf |
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