1 

     2 ======

     3  OCS.

     4 ======

     5 

     6 gocr.

     7 =====

     8 

     9   $ gocr $IN.pnm >$OUT.txt

    10 

    11 ocrfeeder.

    12 ==========

    13 

    14 Document layout analysis and optical character recognition system::

    15 

    16   $ sudo apt-get install ocrfeeder

    17 

    18 Using::

    19 

    20   $ ocrfeeder-cli --o $OUTDIR --format HTML --images $IN.pnm

    21 

    22 tesseract.

    23 ==========

    24 

    25 Installing::

    26 

    27   $ sudo apt-get install tesseract-ocr

    28 

    29 Using::

    30 

    31   $ tesseract $IN.tif $OUT

    32   $ cat $OUT.txt

    33 

    34 ocropus.

    35 ========

    36 

    37   $ ocropus hocr-to-text screen.ppm

    38 

    39 ocrad

    40 =====

    41 

    42 Optical Character Recognition program::

    43 

    44   $ sudo apt-get install ocrad

    45 

    46 Misc.

    47 =====

    48 

    49 unpapper