mirror of
https://git.code.sf.net/p/seeddms/code
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60 lines
2.0 KiB
Plaintext
60 lines
2.0 KiB
Plaintext
OCR
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====
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SeedDMS itself has no support for optical character recognition (OCR)
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because it does not care about the content of file. Though, external
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OCR software can be used to convert an image into text and index it
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by the full text search engine.
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The following script can be use to convert a scanned image into pdf
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with a text layer added. The script actually takes this file to
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ran it through pdftotext. It was published in the seeddms forum
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https://sourceforge.net/p/seeddms/discussion/general/thread/4ec5973d/
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#!/bin/bash
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inputpdf=$1
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temp_folder=/tmp/seedinput/$(date +"%Y_%m_%d_%H%M%S")/
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lockfile=/tmp/seed
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protokolldatei=./tesser_syslog
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cores=2
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mkdir -p $lockfile
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while [ -e "$lockfile"/"`basename $0`" ];
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do
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sleep 5
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done
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if ( set -o noclobber; echo "locked" > "$lockfile"/"`basename $0`"); then
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trap 'rm -f "$lockfile"/"`basename $0`"; echo $(date) " Lockdatei wird geloescht: " $lockfile"/"`basename $0` Aufrufparameter: $* >> $protokolldatei ;rm -r $temp_folder; exit $?' INT TERM KILL EXIT
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#das Datum mit dem Scriptnamen in die Protokolldatei schreiben
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echo $(date) " Lockdatei erstellt: " $lockfile"/"`basename $0` >> $protokolldatei
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else
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#Script beenden falls Lockdatei nicht erstellt werden konnte
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echo $(date) " Programm wird beendet, Lockdatei konnte nicht erstellt werden: $lockfile"/"`basename $0` Aufrufparameter: $* " >> $protokolldatei
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exit 1
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fi
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mkdir -p $temp_folder
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$(pdftotext -raw $1 - 1> $temp_folder''tmp.txt )
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pdf_contents=`cat $temp_folder''tmp.txt`
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pdf_contents=`echo "$pdf_contents" | tr -dc '[:print:]'`
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if [ -z "$pdf_contents" ]; then
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convert -density 300 -quality 95 $inputpdf +adjoin $temp_folder''image%03d.jpg
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find $temp_folder -name '*.jpg'| parallel --gnu -j $cores tesseract -l deu --psm 6 {} {} pdf
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num=`find $temp_folder -name '*.pdf'| wc -l`
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if [ "$num" -gt "1" ]; then
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pdfunite $temp_folder*.pdf $temp_folder''tmp.pdf
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else
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mv $temp_folder*.pdf $temp_folder''tmp.pdf
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fi
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pdftotext $temp_folder''tmp.pdf $temp_folder''tmp.txt
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mv $temp_folder''tmp.pdf $1
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fi
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cat $temp_folder''tmp.txt
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