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comparison mupdf-source/thirdparty/tesseract/doc/unicharset_extractor.1.asc @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1 UNICHARSET_EXTRACTOR(1)
2 =======================
3
4 NAME
5 ----
6 unicharset_extractor - Reads box or plain text files to extract the unicharset.
7
8 SYNOPSIS
9 --------
10 *unicharset_extractor* [--output_unicharset filename] [--norm_mode mode] box_or_text_file [...]
11
12 Where mode means:
13 1=combine graphemes (use for Latin and other simple scripts)
14 2=split graphemes (use for Indic/Khmer/Myanmar)
15 3=pure unicode (use for Arabic/Hebrew/Thai/Tibetan)
16
17 DESCRIPTION
18 -----------
19 Tesseract needs to know the set of possible characters it can output.
20 To generate the unicharset data file, use the unicharset_extractor
21 program on training pages bounding box files or a plain text file:
22
23 unicharset_extractor fontfile_1.box fontfile_2.box ...
24
25 The unicharset will be put into the file './unicharset' if no output filename is provided.
26
27 *NOTE* Use the appropriate norm_mode based on the language.
28
29 SEE ALSO
30 --------
31 tesseract(1), unicharset(5)
32
33 <https://tesseract-ocr.github.io/tessdoc/Training-Tesseract.html>
34
35 HISTORY
36 -------
37 unicharset_extractor first appeared in Tesseract 2.00.
38
39 COPYING
40 -------
41 Copyright \(C) 2006, Google Inc.
42 Licensed under the Apache License, Version 2.0
43
44 AUTHOR
45 ------
46 The Tesseract OCR engine was written by Ray Smith and his research groups
47 at Hewlett Packard (1985-1995) and Google (2006-2018).