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======
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OCS.
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======
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gocr.
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=====
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$ gocr $IN.pnm >$OUT.txt
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ocrfeeder.
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==========
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Document layout analysis and optical character recognition system::
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$ sudo apt-get install ocrfeeder
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Using::
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$ ocrfeeder-cli --o $OUTDIR --format HTML --images $IN.pnm
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tesseract.
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==========
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Installing::
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$ sudo apt-get install tesseract-ocr
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Using::
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$ tesseract $IN.tif $OUT
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$ cat $OUT.txt
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ocropus.
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========
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$ ocropus hocr-to-text screen.ppm
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ocrad
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=====
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Optical Character Recognition program::
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$ sudo apt-get install ocrad
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Misc.
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=====
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unpapper
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