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This enables all OpenType ligatures for a specific font, where available. Specifically, it explicitly enables the OpenType features liga (standard ligatures), hlig (historical ligatures), clig (contextual ligatures), and dlig (discretionary ligatures). This feature requires Pango 1.38 or newer. |
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For the latest online version of the README.md see:
https://github.com/tesseract-ocr/tesseract/blob/master/README.md
#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 and github's log of 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 for more information.
Tesseract supports various output formats: plain-text, hocr(html), pdf.
This project does not include a GUI application. If you need one, please see the 3rdParty wiki page.
You should note that in many cases, in order to get better OCR results, you'll need to improve the quality of the image you are giving Tesseract.
The latest stable version is 3.04.01, released in February 2016.
#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.
#For developers
Developers can use libtesseract C or C++ API to build their own application. If you need bindings to libtesseract for other programming languages, please see the wrapper section on AddOns wiki page.
Documentation of Tesseract generated from source code by doxygen can be found on 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
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.
#Installing Tesseract
You can either Install Tesseract via pre-built binary package or build it from source.
#Running Tesseract
Basic command line usage:
tesseract imagename outputbase [-l lang] [-psm pagesegmode] [configfiles...]
For more information about the various command line options use tesseract --help or man tesseract.
#Support
Mailing-lists:
- tesseract-ocr - For tesseract users.
- tesseract-dev - For tesseract developers.
Please read the FAQ before asking any question in the mailing-list or reporting an issue.