33 lines
926 B
Bash
33 lines
926 B
Bash
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#!/bin/sh
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if [ $# -ne 1 ]; then
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echo "usage: $0 image"
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exit
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fi
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echo "converting image to pdf, trying all compressions imagemagick has to offer"
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echo "if, as a result, Zip/FlateDecode should NOT be the lossless compression with the lowest size ratio, contact me j [dot] schauer [at] email [dot] de"
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echo "also, send me the image in question"
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echo
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imsize=`stat -c "%s" "$1"`
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for a in `convert -list compress`; do
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echo "encode:\t$a"
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convert "$1" -compress $a "`basename $1 .jpg`.pdf"
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pdfimages "`basename $1 .jpg`.pdf" "`basename $1 .jpg`"
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/bin/echo -ne "diff:\t"
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diff=`compare -metric AE "$1" "\`basename $1 .jpg\`-000.ppm" null: 2>&1`
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if [ "$diff" != "0" ]; then
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echo "lossy"
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else
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echo "lossless"
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fi
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/bin/echo -ne "size:\t"
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pdfsize=`stat -c "%s" "\`basename $1 .jpg\`.pdf"`
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echo "scale=1;$pdfsize/$imsize" | bc
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/bin/echo -ne "pdf:\t"
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grep --max-count=1 --text /Filter "`basename $1 .jpg`.pdf"
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echo
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done
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