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- #!/bin/bash
- # pdf2png-binary
- #
- # Rasterizes a PDF file, saving as a set of binary png images
- #
- # input: PDF
- # root name of output files
- # output: 1 bpp png files for each page
- #
- # Note 1: Requires ghostscript
- #
- # Note 2: A modern alternative to ghostcript is to use poplar:
- # If the pdf is composed of images that were orthographically generated:
- # pdftoppm -png <pdf-file> <pdf-root> [output in png]
- # If the pdf is composed of images that were scanned:
- # pdftoppm -jpeg <pdf-file> <pdf-root> [output in jpeg]
- scriptname=${0##*/}
- if test $# != 2
- then
- echo "usage: " $scriptname " inpdffile outpngroot"
- exit -1
- fi
- inpdffile=$1
- outpngroot=$2
- # need mysterious "primer"
- # choose one of the two options below
- # output image size depending on resolution
- echo "0 neg 0 neg" translate | gs -sDEVICE=pngmono -sOutputFile=${outpngroot}%03d.png -r300x300 -q - ${inpdffile}
- # output fixed image size
- #echo "0 neg 0 neg" translate | gs -sDEVICE=pngmono -sOutputFile=${outpngroot}%03d.png -g2550x3300 -r300x300 -q - ${inpdffile}
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