10-13-2003
Very helpful
Perderabo's code was very helpful. I used it adn worked fine, except that my linux box was giving me errors on set and typset commands
, so I just took them out!
Thanks
Nitin
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LEARN ABOUT DEBIAN
unicharset_extractor
UNICHARSET_EXTRACTOR(1) UNICHARSET_EXTRACTOR(1)
NAME
unicharset_extractor - extract unicharset from Tesseract boxfiles
SYNOPSIS
unicharset_extractor [-D dir] FILE...
DESCRIPTION
Tesseract needs to know the set of possible characters it can output. To generate the unicharset data file, use the unicharset_extractor
program on the same training pages bounding box files as used for clustering:
unicharset_extractor fontfile_1.box fontfile_2.box ...
The unicharset will be put into the file dir/unicharset, or simply ./unicharset if no output directory is provided.
Tesseract also needs to have access to character properties isalpha, isdigit, isupper, islower, ispunctuation. all of this auxilury data
and more is encoded in this file. (See unicharset(5))
If your system supports the wctype functions, these values will be set automatically by unicharset_extractor and there is no need to edit
the unicharset file. On some older systems (eg Windows 95), the unicharset file must be edited by hand to add these property description
codes.
NOTE The unicharset file must be regenerated whenever inttemp, normproto and pffmtable are generated (i.e. they must all be recreated when
the box file is changed) as they have to be in sync. This is made easier than in previous versions by running unicharset_extractor before
mftraining and cntraining, and giving the unicharset to mftraining.
SEE ALSO
tesseract(1), unicharset(5)
http://code.google.com/p/tesseract-ocr/wiki/TrainingTesseract3
HISTORY
unicharset_extractor first appeared in Tesseract 2.00.
COPYING
Copyright (C) 2006, Google Inc. Licensed under the Apache License, Version 2.0
AUTHOR
The Tesseract OCR engine was written by Ray Smith and his research groups at Hewlett Packard (1985-1995) and Google (2006-present).
02/09/2012 UNICHARSET_EXTRACTOR(1)