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<refentry lang="en">
<refmeta>
<refentrytitle>combine_tessdata</refentrytitle>
<manvolnum>1</manvolnum>
<refmiscinfo class="source">&nbsp;</refmiscinfo>
<refmiscinfo class="manual">&nbsp;</refmiscinfo>
</refmeta>
<refnamediv>
    <refname>combine_tessdata</refname>
    <refpurpose>combine/extract/overwrite Tesseract data</refpurpose>
</refnamediv>
<refsynopsisdiv id="_synopsis">
<simpara><emphasis role="strong">combine_tessdata</emphasis> [<emphasis>OPTION</emphasis>] <emphasis>FILE</emphasis>&#8230;</simpara>
</refsynopsisdiv>
<refsect1 id="_description">
<title>DESCRIPTION</title>
<simpara>combine_tessdata(1) is the main program to combine/extract/overwrite
tessdata components in [lang].traineddata files.</simpara>
<simpara>To combine all the individual tessdata components (unicharset, DAWGs,
classifier templates, ambiguities, language configs) located at, say,
/home/$USER/temp/eng.* run:</simpara>
<literallayout class="monospaced">combine_tessdata /home/$USER/temp/eng.</literallayout>
<simpara>The result will be a combined tessdata file /home/$USER/temp/eng.traineddata</simpara>
<simpara>Specify option -e if you would like to extract individual components
from a combined traineddata file. For example, to extract language config
file and the unicharset from tessdata/eng.traineddata run:</simpara>
<literallayout class="monospaced">combine_tessdata -e tessdata/eng.traineddata
/home/$USER/temp/eng.config /home/$USER/temp/eng.unicharset</literallayout>
<simpara>The desired config file and unicharset will be written to
/home/$USER/temp/eng.config /home/$USER/temp/eng.unicharset</simpara>
<simpara>Specify option -o to overwrite individual components of the given
[lang].traineddata file. For example, to overwrite language config
and unichar ambiguities files in tessdata/eng.traineddata use:</simpara>
<literallayout class="monospaced">combine_tessdata -o tessdata/eng.traineddata
/home/$USER/temp/eng.config /home/$USER/temp/eng.unicharambigs</literallayout>
<simpara>As a result, tessdata/eng.traineddata will contain the new language config
and unichar ambigs, plus all the original DAWGs, classifier templates, etc.</simpara>
<simpara>Note: the file names of the files to extract to and to overwrite from should
have the appropriate file suffixes (extensions) indicating their tessdata
component type (.unicharset for the unicharset, .unicharambigs for unichar
ambigs, etc). See k*FileSuffix variable in ccutil/tessdatamanager.h.</simpara>
<simpara>Specify option -u to unpack all the components to the specified path:</simpara>
<literallayout class="monospaced">combine_tessdata -u tessdata/eng.traineddata /home/$USER/temp/eng.</literallayout>
<simpara>This will create  /home/$USER/temp/eng.* files with individual tessdata
components from tessdata/eng.traineddata.</simpara>
</refsect1>
<refsect1 id="_options">
<title>OPTIONS</title>
<simpara><emphasis role="strong">-e</emphasis> <emphasis>.traineddata</emphasis> <emphasis>FILE</emphasis>&#8230;:
    Extracts the specified components from the .traineddata file</simpara>
<simpara><emphasis role="strong">-o</emphasis> <emphasis>.traineddata</emphasis> <emphasis>FILE</emphasis>&#8230;:
    Overwrites the specified components of the .traineddata file
    with those provided on the comand line.</simpara>
<simpara><emphasis role="strong">-u</emphasis> <emphasis>.traineddata</emphasis> <emphasis>PATHPREFIX</emphasis>
    Unpacks the .traineddata using the provided prefix.</simpara>
</refsect1>
<refsect1 id="_caveats">
<title>CAVEATS</title>
<simpara><emphasis>Prefix</emphasis> refers to the full file prefix, including period (.)</simpara>
</refsect1>
<refsect1 id="_history">
<title>HISTORY</title>
<simpara>combine_tessdata(1) first appeared in version 3.00 of Tesseract</simpara>
</refsect1>
<refsect1 id="_see_also">
<title>SEE ALSO</title>
<simpara>tesseract(1)</simpara>
</refsect1>
<refsect1 id="_copying">
<title>COPYING</title>
<simpara>Copyright (C) 2009, Google Inc.
Licensed under the Apache License, Version 2.0</simpara>
</refsect1>
</refentry>
