# COMBINE_TESSDATA(1) Manual Page

## NAME

combine_tessdata - combine/extract/overwrite Tesseract data

## SYNOPSIS

combine_tessdata [OPTION] FILE…

## DESCRIPTION

combine_tessdata(1) is the main program to combine/extract/overwrite tessdata components in [lang].traineddata files.

To combine all the individual tessdata components (unicharset, DAWGs, classifier templates, ambiguities, language configs) located at, say, /home/$USER/temp/eng.* run:

    combine_tessdata /home/$USER/temp/eng.

The result will be a combined tessdata file /home/$USER/temp/eng.traineddata

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:

    combine_tessdata -e tessdata/eng.traineddata
    /home/$USER/temp/eng.config /home/$USER/temp/eng.unicharset

The desired config file and unicharset will be written to /home/$USER/temp/eng.config /home/$USER/temp/eng.unicharset

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:

    combine_tessdata -o tessdata/eng.traineddata
    /home/$USER/temp/eng.config /home/$USER/temp/eng.unicharambigs

As a result, tessdata/eng.traineddata will contain the new language config and unichar ambigs, plus all the original DAWGs, classifier templates, etc.

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.

Specify option -u to unpack all the components to the specified path:

    combine_tessdata -u tessdata/eng.traineddata /home/$USER/temp/eng.

This will create /home/$USER/temp/eng.* files with individual tessdata components from tessdata/eng.traineddata.

## OPTIONS

-e .traineddata FILE…: Extracts the specified components from the .traineddata file

-o .traineddata FILE…: Overwrites the specified components of the .traineddata file with those provided on the comand line.

-u .traineddata PATHPREFIX Unpacks the .traineddata using the provided prefix.

## CAVEATS

Prefix refers to the full file prefix, including period (.)

## HISTORY

combine_tessdata(1) first appeared in version 3.00 of Tesseract

## SEE ALSO

tesseract(1)

## COPYING

Copyright (C) 2009, Google Inc. Licensed under the Apache License, Version 2.0