mirror of
https://github.com/tesseract-ocr/tesseract.git
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246 lines
9.8 KiB
XML
246 lines
9.8 KiB
XML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
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<refentry lang="en">
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<refmeta>
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<refentrytitle>tesseract</refentrytitle>
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<manvolnum>1</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>tesseract</refname>
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<refpurpose>command-line OCR engine</refpurpose>
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</refnamediv>
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<refsynopsisdiv id="synopsis">
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<simpara><emphasis role="strong">tesseract</emphasis> <emphasis>imagename</emphasis> <emphasis>textbase</emphasis> [<emphasis>configfile</emphasis>] [<emphasis>-l lang</emphasis>]</simpara>
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</refsynopsisdiv>
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<refsect1 id="description">
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<title>DESCRIPTION</title>
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<simpara>tesseract(1) is a commercial quality OCR engine originally developed at HP
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between 1985 and 1995. In 1995, this engine was among the top 3 evaluated by
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UNLV. It was open-sourced by HP and UNLV in 2005, and has been developed
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by Google since then.</simpara>
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</refsect1>
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<refsect1 id="options">
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<title>OPTIONS</title>
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<simpara><emphasis>imagename</emphasis>
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The name of the input image</simpara>
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<simpara><emphasis>textbase</emphasis>
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The basename of the output file (to which the appropriate extension
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will be appended)</simpara>
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<simpara><emphasis>configfile</emphasis>
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The config to use. A config is a plaintext file which contains a list
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of variables and their values, one per line, with a space separating
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variable from value.</simpara>
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<simpara><emphasis>-l lang</emphasis>
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The language to use. If none is specified, English is assumed.
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Tesseract uses 3-character ISO 639-2 language codes. (See LANGUAGES)</simpara>
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<simpara><emphasis>-v</emphasis>
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Returns the current version of the tesseract(1) executable.</simpara>
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</refsect1>
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<refsect1 id="languages">
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<title>LANGUAGES</title>
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<simpara>There are currently language packs available for the following languages:</simpara>
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<informaltable
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frame="all"
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rowsep="1" colsep="1"
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>
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<?dbhtml table-width="40%"?>
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<?dbfo table-width="40%"?>
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<tgroup cols="2">
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<colspec colname="col_1" colwidth="85*"/>
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<colspec colname="col_2" colwidth="85*"/>
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<thead>
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<row>
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<entry align="left" valign="top">Code</entry>
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<entry align="left" valign="top">Name</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry align="left" valign="top"><simpara>bul</simpara></entry>
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<entry align="left" valign="top"><simpara>Bulgarian</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>cat</simpara></entry>
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<entry align="left" valign="top"><simpara>Catalan</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>ces</simpara></entry>
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<entry align="left" valign="top"><simpara>Czech</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>chi_sim</simpara></entry>
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<entry align="left" valign="top"><simpara>Simplified Chinese</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>chi_tra</simpara></entry>
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<entry align="left" valign="top"><simpara>Traditional Chinese</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>dan</simpara></entry>
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<entry align="left" valign="top"><simpara>Danish</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>dan-frak</simpara></entry>
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<entry align="left" valign="top"><simpara>Danish (Fraktur)</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>deu</simpara></entry>
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<entry align="left" valign="top"><simpara>German</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>ell</simpara></entry>
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<entry align="left" valign="top"><simpara>Greek</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>eng</simpara></entry>
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<entry align="left" valign="top"><simpara>English</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>fin</simpara></entry>
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<entry align="left" valign="top"><simpara>Finnish</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>fra</simpara></entry>
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<entry align="left" valign="top"><simpara>French</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>hun</simpara></entry>
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<entry align="left" valign="top"><simpara>Hungarian</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>ind</simpara></entry>
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<entry align="left" valign="top"><simpara>Indonesian</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>ita</simpara></entry>
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<entry align="left" valign="top"><simpara>Italian</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>jpn</simpara></entry>
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<entry align="left" valign="top"><simpara>Japanese</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>kor</simpara></entry>
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<entry align="left" valign="top"><simpara>Korean</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>lav</simpara></entry>
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<entry align="left" valign="top"><simpara>Latvian</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>lit</simpara></entry>
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<entry align="left" valign="top"><simpara>Lithuanian</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>nld</simpara></entry>
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<entry align="left" valign="top"><simpara>Dutch</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>nor</simpara></entry>
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<entry align="left" valign="top"><simpara>Norwegian</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>pol</simpara></entry>
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<entry align="left" valign="top"><simpara>Polish</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>por</simpara></entry>
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<entry align="left" valign="top"><simpara>Portuguese</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>ron</simpara></entry>
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<entry align="left" valign="top"><simpara>Romanian</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>rus</simpara></entry>
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<entry align="left" valign="top"><simpara>Russian</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>slk</simpara></entry>
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<entry align="left" valign="top"><simpara>Slovakian</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>slv</simpara></entry>
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<entry align="left" valign="top"><simpara>Slovenian</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>spa</simpara></entry>
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<entry align="left" valign="top"><simpara>Spanish</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>srp</simpara></entry>
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<entry align="left" valign="top"><simpara>Serbian</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>swe</simpara></entry>
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<entry align="left" valign="top"><simpara>Swedish</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>tgl</simpara></entry>
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<entry align="left" valign="top"><simpara>Tagalog</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>tha</simpara></entry>
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<entry align="left" valign="top"><simpara>Thai</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>tur</simpara></entry>
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<entry align="left" valign="top"><simpara>Turkish</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>ukr</simpara></entry>
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<entry align="left" valign="top"><simpara>Ukrainian</simpara></entry>
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</row>
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<row>
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<entry align="left" valign="top"><simpara>vie</simpara></entry>
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<entry align="left" valign="top"><simpara>Vietnamese</simpara></entry>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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</refsect1>
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<refsect1 id="history">
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<title>HISTORY</title>
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<simpara>
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The engine was developed at Hewlett Packard Laboratories Bristol and at
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Hewlett Packard Co, Greeley Colorado between 1985 and 1994, with some more
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changes made in 1996 to port to Windows, and some C++izing in 1998. A lot
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of the code was written in C, and then some more was written in C++. Since
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then all the code has been converted to at least compile with a C++ compiler.
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Currently it builds under Linux with gcc4.0, gcc4.1 and under Windows with
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VC++6 and VC++Express. The C+\+ code makes heavy use of a list system using
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macros. This predates stl, was portable before stl, and is more efficient
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than stl lists, but has the big negative that if you do get a segmentation
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violation, it is hard to debug. Another "feature" of the C/C++ split is
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that the C++ data structures get converted to C data structures to call
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the low-level C code. This is ugly, and the C++izing of the C code
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is a step towards eliminating the conversion, but it has not happened yet.
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</simpara>
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<simpara>
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The most important changes in version 2.00 were that Tesseract can now
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recognize 6 languages, is fully UTF8 capable, and is fully trainable. See
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<ulink url="http://code.google.com/p/tesseract-ocr/wiki/TrainingTesseract">http://code.google.com/p/tesseract-ocr/wiki/TrainingTesseract</ulink>
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for more information on training.</simpara>
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<simpara>Tesseract was included in UNLV’s Fourth Annual Test of OCR
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Accuracy. See
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<ulink url="http://www.isri.unlv.edu/downloads/AT-1995.pdf">http://www.isri.unlv.edu/downloads/AT-1995.pdf</ulink>.
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With Tesseract 2.00, scripts are now included to allow anyone to reproduce
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some of these tests.
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See
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<ulink url="http://code.google.com/p/tesseract-ocr/wiki/TestingTesseract">http://code.google.com/p/tesseract-ocr/wiki/TestingTesseract</ulink>
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for more details.</simpara>
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<simpara>Tesseract 3.00 adds a number of new languages, including Chinese,
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Japanese, and Korean. It also introduces a new, single-file based system of
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managing language data. For further details, see the file ReleaseNotes
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included with the distribution.</simpara>
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</refsect1>
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<refsect1 id="see_also">
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<title>SEE ALSO</title>
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<simpara>tesseract(1)</simpara>
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</refsect1>
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<refsect1 id="copying">
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<title>COPYING</title>
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<simpara>Licensed under the Apache License, Version 2.0</simpara>
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</refsect1>
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</refentry>
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