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66 lines
1.9 KiB
66 lines
1.9 KiB
4 years ago
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#!/bin/bash
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function help () {
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echo "Usage: $0 <inputfile> [<outputfile>]"
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echo "Takes a pdf file, removes any vertical scanner lines, and outputs it as output.pdf if not otherwise specified"
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echo " -e remove lines on even pages. First page is page 0 (even)"
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echo " -o remove lines on odd pages. First page is page 0 (even)"
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echo " -a remove lines on all pages"
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echo " -c increase contrast of pdf file"
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echo " -h display this output"
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exit 1
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}
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while getopts 'eoaclh' opt ; do
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case "$opt" in
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# v) verbosity=VERBOSE ;;
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# q) verbosity=QUIET;;
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e) even='true';;
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o) odd='true';;
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a) even='true'; odd='true';;
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c) contrast='true';;
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h) help ;;
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esac
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done
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input_file=${@:$OPTIND:1}
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output_file=${@:($OPTIND +1):1}
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output_file=${output_file:-'output.pdf'}
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if [ -z "$input_file" ]; then
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help
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fi
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tmp_dir=$(mktemp -d -t processor-images-XXXXX)
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pdfimages -j "$input_file" "$tmp_dir/page"
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for file in "$tmp_dir"/page-*.jpg
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do
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filename="${file##*/}"
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page_nr="${filename:5:3}"
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page_nr=$(echo $page_nr | sed 's/^0*//') # Remove leading zeros
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if [ -z "$page_nr" ]
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then
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page_nr=0
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fi
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echo "Pagenr: $page_nr"
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if [ "$contrast" = 'true' ]
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then
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echo "Increase contrast"
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mogrify -level 25% $file
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fi
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page_even='true'; [ $((page_nr%2)) -eq 1 ] && page_even='false'
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if ( [ "$page_even" = 'true' ] && [ "$even" = 'true' ] ) || ( [ "$page_even" = 'false' ] && [ "$odd" = 'true' ] )
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then
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echo Remove line
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mogrify -morphology bottomhat "1x100:0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0" -negate $file
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fi
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done
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convert $tmp_dir/page-*.jpg "$output_file"
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rm -rf $tmp_dir
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echo "Done! Saved output to $output_file"
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