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# Tesseract OCR

For the latest online version of the README.md see:

https://github.com/tesseract-ocr/tesseract/blob/master/README.md

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# About

This package contains an OCR engine - `libtesseract` and a command line program - `tesseract`.
## About

This package contains an **OCR engine** - `libtesseract` and a **command line program** - `tesseract`.

The lead developer is Ray Smith. The maintainer is Zdenko Podobny.
For a list of contributors see [AUTHORS](https://github.com/tesseract-ocr/tesseract/blob/master/AUTHORS)
and GitHub's log of [contributors](https://github.com/tesseract-ocr/tesseract/graphs/contributors).

Tesseract has unicode (UTF-8) support, and can recognize more than 100
languages "out of the box". It can be trained to recognize other languages. See [Tesseract Training](https://github.com/tesseract-ocr/tesseract/wiki/TrainingTesseract) for more information.
Tesseract has **unicode (UTF-8) support**, and can **recognize more than 100 languages** "out of the box".

Tesseract supports various output formats: plain-text, hocr(html), pdf.
Tesseract supports **various output formats**: plain-text, hocr(html), pdf, tsv, invisible-text-only pdf.

This project does not include a GUI application. If you need one, please see the [3rdParty](https://github.com/tesseract-ocr/tesseract/wiki/User-Projects-%E2%80%93-3rdParty) wiki page.
You should note that in many cases, in order to get better OCR results, you'll need to **[improve the quality](https://github.com/tesseract-ocr/tesseract/wiki/ImproveQuality) of the image** you are giving Tesseract.

You should note that in many cases, in order to get better OCR results, you'll need to [improve the quality](https://github.com/tesseract-ocr/tesseract/wiki/ImproveQuality) of the image you are giving Tesseract.
This project **does not include a GUI application**. If you need one, please see the [3rdParty](https://github.com/tesseract-ocr/tesseract/wiki/User-Projects-%E2%80%93-3rdParty) wiki page.

The latest stable version is 3.05.00, released in February 2017.
Tesseract **can be trained to recognize other languages**. See [Tesseract Training](https://github.com/tesseract-ocr/tesseract/wiki/TrainingTesseract) for more information.

# Brief history
## Brief history

Tesseract was originally developed at Hewlett-Packard Laboratories Bristol and
at Hewlett-Packard Co, Greeley Colorado between 1985 and 1994, with some
more changes made in 1996 to port to Windows, and some C++izing in 1998.

In 2005 Tesseract was open sourced by HP. Since 2006 it is developed by Google.

[Release Notes](https://github.com/tesseract-ocr/tesseract/wiki/ReleaseNotes)

# For developers

Developers can use `libtesseract` [C](https://github.com/tesseract-ocr/tesseract/blob/master/api/capi.h) or [C++](https://github.com/tesseract-ocr/tesseract/blob/master/api/baseapi.h) API to build their own application. If you need bindings to `libtesseract` for other programming languages, please see the [wrapper](https://github.com/tesseract-ocr/tesseract/wiki/AddOns#tesseract-wrappers) section on AddOns wiki page.

Documentation of Tesseract generated from source code by doxygen can be found on [tesseract-ocr.github.io](http://tesseract-ocr.github.io/).

# License

The code in this repository is licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
The latest stable version is **[3.05.01](https://github.com/tesseract-ocr/tesseract/releases/tag/3.05.01)**, released on June 1, 2017. Latest source code for 3.05 is available from [3.05 branch on github](https://github.com/tesseract-ocr/tesseract/tree/3.05).

http://www.apache.org/licenses/LICENSE-2.0
Source code for the new **[LSTM based 4.00.00alpha version](https://github.com/tesseract-ocr/tesseract)** is available from the master branch on github. Please note this branch is under active development.

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

**NOTE**: This software depends on other packages that may be licensed under different open source licenses.
See **[Release Notes](https://github.com/tesseract-ocr/tesseract/wiki/ReleaseNotes)** and **[Change Log](https://github.com/tesseract-ocr/tesseract/blob/master/ChangeLog)** for more details of the releases.

# Installing Tesseract
## Installing Tesseract

You can either [Install Tesseract via pre-built binary package](https://github.com/tesseract-ocr/tesseract/wiki) or [build it from source](https://github.com/tesseract-ocr/tesseract/wiki/Compiling).

## Supported Compilers
Supported Compilers are:

* GCC 4.8 and above
* Clang 3.4 and above
* MSVC 2015, 2017

Other compilers might work, but are not officially supported.

# Running Tesseract
## Running Tesseract

Basic command line usage:
Basic **[command line usage](https://github.com/tesseract-ocr/tesseract/wiki/Command-Line-Usage)**:

tesseract imagename outputbase [-l lang] [--psm pagesegmode] [configfiles...]
tesseract imagename outputbase [-l lang] [--oem ocrenginemode] [--psm pagesegmode] [configfiles...]

For more information about the various command line options use `tesseract --help` or `man tesseract`.

# Support
## For developers

Developers can use `libtesseract` [C](https://github.com/tesseract-ocr/tesseract/blob/master/api/capi.h) or [C++](https://github.com/tesseract-ocr/tesseract/blob/master/api/baseapi.h) API to build their own application. If you need bindings to `libtesseract` for other programming languages, please see the [wrapper](https://github.com/tesseract-ocr/tesseract/wiki/AddOns#tesseract-wrappers) section on AddOns wiki page.

Documentation of Tesseract generated from source code by doxygen can be found on [tesseract-ocr.github.io](http://tesseract-ocr.github.io/).

## Support

Before you submit an issue, please review **[the guidelines for this repository](https://github.com/tesseract-ocr/tesseract/blob/master/CONTRIBUTING.md)**.

For support, first read the [Wiki](https://github.com/tesseract-ocr/tesseract/wiki), particularly the [FAQ](https://github.com/tesseract-ocr/tesseract/wiki/FAQ) to see if your problem is addressed there. If not, search the [Tesseract user forum](https://groups.google.com/d/forum/tesseract-ocr), the [Tesseract developer forum](https://groups.google.com/d/forum/tesseract-dev) and [past issues](https://github.com/tesseract-ocr/tesseract/issues), and if you still can't find what you need, ask for support in the mailing-lists.

Mailing-lists:
* [tesseract-ocr](https://groups.google.com/d/forum/tesseract-ocr) - For tesseract users.
* [tesseract-dev](https://groups.google.com/d/forum/tesseract-dev) - For tesseract developers.

Please read the [FAQ](https://github.com/tesseract-ocr/tesseract/wiki/FAQ) before asking any question in the mailing-list or reporting an issue.
Please report an issue only for a **bug**, not for asking questions.

## License

The code in this repository is licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

**NOTE**: This software depends on other packages that may be licensed under different open source licenses.

## Latest Version of README

For the latest online version of the README.md see:

https://github.com/tesseract-ocr/tesseract/blob/master/README.md

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