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Diffstat (limited to 'test_comp.sh')
| -rwxr-xr-x | test_comp.sh | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/test_comp.sh b/test_comp.sh new file mode 100755 index 0000000..44edefd --- /dev/null +++ b/test_comp.sh @@ -0,0 +1,32 @@ +#!/bin/sh + +if [ $# -ne 1 ]; then + echo "usage: $0 image" + exit +fi + +echo "converting image to pdf, trying all compressions imagemagick has to offer" +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" +echo "also, send me the image in question" +echo + +imsize=`stat -c "%s" "$1"` + +for a in `convert -list compress`; do + echo "encode:\t$a" + convert "$1" -compress $a "`basename $1 .jpg`.pdf" + pdfimages "`basename $1 .jpg`.pdf" "`basename $1 .jpg`" + printf "diff:\t" + diff=`compare -metric AE "$1" "\`basename $1 .jpg\`-000.ppm" null: 2>&1` + if [ "$diff" != "0" ]; then + echo "lossy" + else + echo "lossless" + fi + printf "size:\t" + pdfsize=`stat -c "%s" "\`basename $1 .jpg\`.pdf"` + echo "scale=1;$pdfsize/$imsize" | bc + printf "pdf:\t" + grep --max-count=1 --text /Filter "`basename $1 .jpg`.pdf" + echo +done |