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annotate mupdf-source/thirdparty/tesseract/doc/combine_tessdata.1.asc @ 21:2f43e400f144

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Provide an "all" target to build both the sdist and the wheel
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 10:28:53 +0200
parents b50eed0cc0ef
children
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1 COMBINE_TESSDATA(1)
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2 ===================
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4 NAME
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5 ----
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6 combine_tessdata - combine/extract/overwrite/list/compact Tesseract data
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8 SYNOPSIS
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9 --------
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10 *combine_tessdata* ['OPTION'] 'FILE'...
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12 DESCRIPTION
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13 -----------
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14 combine_tessdata(1) is the main program to combine/extract/overwrite/list/compact
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15 tessdata components in [lang].traineddata files.
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17 To combine all the individual tessdata components (unicharset, DAWGs,
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18 classifier templates, ambiguities, language configs) located at, say,
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19 /home/$USER/temp/eng.* run:
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21 combine_tessdata /home/$USER/temp/eng.
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23 The result will be a combined tessdata file /home/$USER/temp/eng.traineddata
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25 Specify option -e if you would like to extract individual components
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26 from a combined traineddata file. For example, to extract language config
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27 file and the unicharset from tessdata/eng.traineddata run:
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29 combine_tessdata -e tessdata/eng.traineddata \
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30 /home/$USER/temp/eng.config /home/$USER/temp/eng.unicharset
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32 The desired config file and unicharset will be written to
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33 /home/$USER/temp/eng.config /home/$USER/temp/eng.unicharset
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35 Specify option -o to overwrite individual components of the given
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36 [lang].traineddata file. For example, to overwrite language config
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37 and unichar ambiguities files in tessdata/eng.traineddata use:
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39 combine_tessdata -o tessdata/eng.traineddata \
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40 /home/$USER/temp/eng.config /home/$USER/temp/eng.unicharambigs
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42 As a result, tessdata/eng.traineddata will contain the new language config
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43 and unichar ambigs, plus all the original DAWGs, classifier templates, etc.
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45 Note: the file names of the files to extract to and to overwrite from should
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46 have the appropriate file suffixes (extensions) indicating their tessdata
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47 component type (.unicharset for the unicharset, .unicharambigs for unichar
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48 ambigs, etc). See k*FileSuffix variable in ccutil/tessdatamanager.h.
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50 Specify option -u to unpack all the components to the specified path:
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52 combine_tessdata -u tessdata/eng.traineddata /home/$USER/temp/eng.
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54 This will create /home/$USER/temp/eng.* files with individual tessdata
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55 components from tessdata/eng.traineddata.
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57 OPTIONS
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58 -------
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60 *-c* '.traineddata' 'FILE'...:
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61 Compacts the LSTM component in the .traineddata file to int.
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63 *-d* '.traineddata' 'FILE'...:
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64 Lists directory of components from the .traineddata file.
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66 *-e* '.traineddata' 'FILE'...:
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67 Extracts the specified components from the .traineddata file
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69 *-l* '.traineddata' 'FILE'...:
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70 List the network information.
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72 *-o* '.traineddata' 'FILE'...:
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73 Overwrites the specified components of the .traineddata file
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74 with those provided on the command line.
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76 *-u* '.traineddata' 'PATHPREFIX'
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77 Unpacks the .traineddata using the provided prefix.
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79 CAVEATS
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80 -------
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81 'Prefix' refers to the full file prefix, including period (.)
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84 COMPONENTS
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85 ----------
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86 The components in a Tesseract lang.traineddata file as of
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87 Tesseract 4.0 are briefly described below; For more information on
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88 many of these files, see
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89 <https://tesseract-ocr.github.io/tessdoc/Training-Tesseract.html>
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90 and
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91 <https://tesseract-ocr.github.io/tessdoc/TrainingTesseract-4.00.html>
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93 lang.config::
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94 (Optional) Language-specific overrides to default config variables.
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95 For 4.0 traineddata files, lang.config provides control parameters which
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96 can affect layout analysis, and sub-languages.
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98 lang.unicharset::
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99 (Required - 3.0x legacy tesseract) The list of symbols that Tesseract recognizes, with properties.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
100 See unicharset(5).
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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101
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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102 lang.unicharambigs::
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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103 (Optional - 3.0x legacy tesseract) This file contains information on pairs of recognized symbols
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
104 which are often confused. For example, 'rn' and 'm'.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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105
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
106 lang.inttemp::
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
107 (Required - 3.0x legacy tesseract) Character shape templates for each unichar. Produced by
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
108 mftraining(1).
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
109
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
110 lang.pffmtable::
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
111 (Required - 3.0x legacy tesseract) The number of features expected for each unichar.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
112 Produced by mftraining(1) from *.tr* files.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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113
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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114 lang.normproto::
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
115 (Required - 3.0x legacy tesseract) Character normalization prototypes generated by cntraining(1)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
116 from *.tr* files.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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117
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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118 lang.punc-dawg::
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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119 (Optional - 3.0x legacy tesseract) A dawg made from punctuation patterns found around words.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
120 The "word" part is replaced by a single space.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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121
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
122 lang.word-dawg::
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
123 (Optional - 3.0x legacy tesseract) A dawg made from dictionary words from the language.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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124
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
125 lang.number-dawg::
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
126 (Optional - 3.0x legacy tesseract) A dawg made from tokens which originally contained digits.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
127 Each digit is replaced by a space character.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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128
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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129 lang.freq-dawg::
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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130 (Optional - 3.0x legacy tesseract) A dawg made from the most frequent words which would have
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
131 gone into word-dawg.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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132
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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133 lang.fixed-length-dawgs::
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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134 (Optional - 3.0x legacy tesseract) Several dawgs of different fixed lengths -- useful for
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
135 languages like Chinese.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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136
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
137 lang.shapetable::
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
138 (Optional - 3.0x legacy tesseract) When present, a shapetable is an extra layer between the character
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
139 classifier and the word recognizer that allows the character classifier to
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
140 return a collection of unichar ids and fonts instead of a single unichar-id
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
141 and font.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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142
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
143 lang.bigram-dawg::
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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144 (Optional - 3.0x legacy tesseract) A dawg of word bigrams where the words are separated by a space
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
145 and each digit is replaced by a '?'.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
146
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
147 lang.unambig-dawg::
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
148 (Optional - 3.0x legacy tesseract) .
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
149
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
150 lang.params-model::
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
151 (Optional - 3.0x legacy tesseract) .
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
152
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
153 lang.lstm::
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
154 (Required - 4.0 LSTM) Neural net trained recognition model generated by lstmtraining.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
155
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
156 lang.lstm-punc-dawg::
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
157 (Optional - 4.0 LSTM) A dawg made from punctuation patterns found around words.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
158 The "word" part is replaced by a single space. Uses lang.lstm-unicharset.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
159
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
160 lang.lstm-word-dawg::
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
161 (Optional - 4.0 LSTM) A dawg made from dictionary words from the language.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
162 Uses lang.lstm-unicharset.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
163
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
164 lang.lstm-number-dawg::
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
165 (Optional - 4.0 LSTM) A dawg made from tokens which originally contained digits.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
166 Each digit is replaced by a space character. Uses lang.lstm-unicharset.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
167
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
168 lang.lstm-unicharset::
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
169 (Required - 4.0 LSTM) The unicode character set that Tesseract recognizes, with properties.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
170 Same unicharset must be used to train the LSTM and build the lstm-*-dawgs files.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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171
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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172 lang.lstm-recoder::
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
173 (Required - 4.0 LSTM) Unicharcompress, aka the recoder, which maps the unicharset
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
174 further to the codes actually used by the neural network recognizer. This is created as
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
175 part of the starter traineddata by combine_lang_model.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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176
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
177 lang.version::
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
178 (Optional) Version string for the traineddata file.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
179 First appeared in version 4.0 of Tesseract.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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180 Old version of traineddata files will report Version:Pre-4.0.0.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
181 4.0 version of traineddata files may include the network spec
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
182 used for LSTM training as part of version string.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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183
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
184 HISTORY
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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185 -------
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
186 combine_tessdata(1) first appeared in version 3.00 of Tesseract
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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187
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
188 SEE ALSO
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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189 --------
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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190 tesseract(1), wordlist2dawg(1), cntraining(1), mftraining(1), unicharset(5),
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
191 unicharambigs(5)
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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192
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
193 COPYING
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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194 -------
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
195 Copyright \(C) 2009, Google Inc.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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196 Licensed under the Apache License, Version 2.0
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parents:
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197
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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198 AUTHOR
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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199 ------
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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200 The Tesseract OCR engine was written by Ray Smith and his research groups
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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201 at Hewlett Packard (1985-1995) and Google (2006-2018).