deskew-pdf

#!/bin/sh

# mass deskew scanned files via command line
# - requires: ImageMagick and Deskew Tool
# - see http://galfar.vevb.net/wp/tag/deskew

for d in "$@"; do

  file=`basename "$d" .pdf`
  cd "`dirname "$d"`"

  # extract each page to a jpg
  convert -density 200 -quality 100 "$d" "$file.%02d.skewed.jpg"
  #convert -density 200 -quality 100 -rotate -90 "$d" "$file.%02d.skewed.jpg"

  # deskew all pages
  for p in `ls *.skewed.jpg`; do
    deskew-osx -b FFFFFF -o "`basename "$p" .jpg`.deskew.jpg" "$p"
  done

  # recombine deskewed jpgs to single pdf
  mv "$d" "$file.original.pdf"
  convert *.deskew.jpg -sharpen 5 -quality 70 -page A4 "$d"
  #convert *.deskew.jpg -density 200 -sharpen 5 -quality 70 -resize "1172x829" "$d"

  # cleanup
  rm *.jpg

done

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