UNICHARSET_EXTRACTOR(1)UNICHARSET_EXTRACTOR(1)NAMEunicharset_extractor - extract unicharset from Tesseract boxfiles
SYNOPSISunicharset_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 ALSOtesseract(1), unicharset(5)
http://code.google.com/p/tesseract-ocr/wiki/TrainingTesseract3
HISTORYunicharset_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)
