mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-11-27 20:59:36 +08:00
58e06c8c45
git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@670 d0cd1f9f-072b-0410-8dd7-cf729c803f20
58 lines
1.8 KiB
Plaintext
58 lines
1.8 KiB
Plaintext
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).
|