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| Ray Smith (lead developer) <[email protected]> | ||
| Phil Cheatle | ||
| Simon Crouch | ||
| Dan Johnson | ||
| Mark Seaman | ||
| Sheelagh Huddleston | ||
| Chris Newton | ||
| ... and several others. |
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| This package contains the Tesseract Open Source OCR Engine. | ||
| Orignally developed at Hewlett Packard Laboratories Bristol and | ||
| at Hewlett Packard Co, Greeley Colorado, all the code | ||
| in this distribution is now licensed under the Apache License: | ||
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| ** 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. | ||
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| Other Dependencies and Licenses: | ||
| ================================ | ||
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| Tesseract use Leptonica library (http://leptonica.com/) with a very weakly | ||
| restricted copyright license (http://leptonica.com/about-the-license.html) | ||
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| 2012-02-01 - v3.02 | ||
| * Moved ResultIterator/PageIterator to ccmain. | ||
| * Added Right-to-left/Bidi capability in the output iterators for Hebrew/Arabic. | ||
| * Added paragraph detection in layout analysis/post OCR. | ||
| * Fixed inconsistent xheight during training and over-chopping. | ||
| * Added simultaneous multi-language capability. | ||
| * Refactored top-level word recognition module. | ||
| * Added experimental equation detector. | ||
| * Improved handling of resolution from input images. | ||
| * Blamer module added for error analysis. | ||
| * Cleaned up externally used namespace by removing includes from baseapi.h. | ||
| * Removed dead memory mangagement code. | ||
| * Tidied up constraints on control parameters. | ||
| * Added support for ShapeTable in classifier and training. | ||
| * Refactored class pruner. | ||
| * Fixed training leaks and randomness. | ||
| * Major improvements to layout analysis for better image detection, diacritic detection, better textline finding, better tabstop finding. | ||
| * Improved line detection and removal. | ||
| * Added fixed pitch chopper for CJK. | ||
| * Added UNICHARSET to WERD_CHOICE to make mult-language handling easier. | ||
| * Fixed problems with internally scaled images. | ||
| * Added page and bbox to string in tr files to identify source of training data better. | ||
| * Fixes to Hindi Shiroreka splitter. | ||
| * Added word bigram correction. | ||
| * Reduced stack memory consumption and eliminated some ugly typedefs. | ||
| * Added new uniform classifier API. | ||
| * Added new training error counter. | ||
| * Fixed endian bug in dawg reader. | ||
| * Many other fixes, including the way in which the chopper finds chops and messes with the outline while it does so. | ||
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| 2010-11-29 - V3.01 | ||
| * Removed old/dead serialise/deserialze methods on *LISTIZED classes. | ||
| * Total rewrite of DENORM to better encapsulate operation and make | ||
| for potential to extract features from images. | ||
| * Thread-safety! Moved all critical globals and statics to members of the appropriate class. Tesseract is now thread-safe (multiple instances can be used in parallel in multiple threads.) with the minor exception that some control parameters are still global and affect all threads. | ||
| * Added Cube, a new recognizer for Arabic. Cube can also be used in combination with normal Tesseract for other languages with an improvement in accuracy at the cost of (much) lower speed. *There is no training module for Cube yet.* | ||
| * `OcrEngineMode` in `Init` replaces `AccuracyVSpeed` to control cube. | ||
| * Greatly improved segmentation search with consequent accuracy and speed improvements, especially for Chinese. | ||
| * Added `PageIterator` and `ResultIterator` as cleaner ways to get the full results out of Tesseract, that are not currently provided by any of the `TessBaseAPI::Get*` methods. All other methods, such as the `ETEXT_STRUCT` in particular are deprecated and will be deleted in the future. | ||
| * ApplyBoxes totally rewritten to make training easier. It can now cope with touching/overlapping training characters, and a new boxfile format allows word boxes instead of character boxes, BUT to use that you have to have already boostrapped the language with character boxes. "Cyclic dependency" on traineddata. | ||
| * Auto orientation and script detection added to page layout analysis. | ||
| * Deleted *lots* of dead code. | ||
| * Fixxht module replaced with scalable data-driven module. | ||
| * Output font characteristics accuracy improved. | ||
| * Removed the double conversion at each classification. | ||
| * Upgraded oldest structs to be classes and deprecated PBLOB. | ||
| * Removed non-deterministic baseline fit. | ||
| * Added fixed length dawgs for Chinese. | ||
| * Handling of vertical text improved. | ||
| * Handling of leader dots improved. | ||
| * Table detection greatly improved. | ||
| * Fixed a couple of memory leaks. | ||
| * Fixed font labels on output text. (Not perfect, but a lot better than before.) | ||
| * Cleanup and more bug fixes | ||
| * Special treatments for Hindi. | ||
| * Support for build in VS2010 with Microsoft Windows SDK for Windows 7 (thanks to Michael Lutz) | ||
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| 2010-09-21 - V3.00 | ||
| * Preparations for thread safety: | ||
| * Changed TessBaseAPI methods to be non-static | ||
| * Created a class hierarchy for the directories to hold instance data, | ||
| and began moving code into the classes. | ||
| * Moved thresholding code to a separate class. | ||
| * Added major new page layout analysis module. | ||
| * Added HOCR output (issues 221, 263: thanks to amkryukov). | ||
| * Added Leptonica as main image I/O and handling. Currently optional, | ||
| but in future releases linking with Leptonica will be mandatory. | ||
| * Ambiguity table rewritten to allow definite replacements in place | ||
| of fix_quotes. | ||
| * Added TessdataManager to combine data files into a single file. | ||
| * Some dead code deleted. | ||
| * VC++6 no longer supported. It can't cope with the use of templates. | ||
| * Many more languages added. | ||
| * Doxygenation of most of the function header comments. | ||
| * Added man pages. | ||
| * Added bash completion script (issue 247: thanks to neskiem) | ||
| * Fix integer overview in thresholding (issue 366: thanks to Cyanide.Drake) | ||
| * Add Danish Fraktur support (issues 300, 360: thanks to | ||
| [email protected]) | ||
| * Fix file pointer leak (issue 359, thanks to yukihiro.nakadaira) | ||
| * Fix an error using user-words (Issue 345: thanks to max.markin) | ||
| * Fix a memory leak in tablefind.cpp (Issue 342, thanks to zdravco) | ||
| * Fix a segfault due to double fclose (Issue 320, thanks to souther) | ||
| * Fix an automake error (Issue 318, thanks to ichanjz) | ||
| * Fix a Win32 crash on fileFormatIsTiff() (Issues 304, 316, 317, 330, 347, | ||
| 349, 352: thanks to nguyenq87, max.markin, zdenop) | ||
| * Fixed a number of errors in newer (stricter) versions of VC++ (Issues | ||
| 301, among others) | ||
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| 2010-07-19 gettextize <[email protected]> | ||
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| * m4/gettext.m4: New file, from gettext-0.17. | ||
| * m4/iconv.m4: New file, from gettext-0.17. | ||
| * m4/lib-ld.m4: New file, from gettext-0.17. | ||
| * m4/lib-link.m4: New file, from gettext-0.17. | ||
| * m4/lib-prefix.m4: New file, from gettext-0.17. | ||
| * m4/nls.m4: New file, from gettext-0.17. | ||
| * m4/po.m4: New file, from gettext-0.17. | ||
| * m4/progtest.m4: New file, from gettext-0.17. | ||
| * Makefile.am (SUBDIRS): Add po. | ||
| (EXTRA_DIST): Add config/config.rpath. | ||
| * configure.ac (AC_CONFIG_FILES): Add po/Makefile.in. | ||
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| June 2006 - V1.0 of open source Tesseract checked-in. | ||
| Sep 7 2006 - V1.01. | ||
| Added mfcpch.cpp and getopt.cpp for VC++. | ||
| Fixed problem with greyscale images and no libtiff. | ||
| Stopped debug window from being used for the usage output. | ||
| Fixed load of inttemp for big-endian architectures. | ||
| Fixed some Mac compilation issues. | ||
| Oct 4 2006 - V1.02 | ||
| Removed dependency on Aspirin. | ||
| Fixed a few missing Apache license headers. | ||
| Removed $log. | ||
| Feb 2 2007 - V1.03 | ||
| Added mftraining and cntraining. | ||
| Added baseapi with adaptive thresholding for grey and color. | ||
| Fixed many memory leaks. | ||
| Fixed several bugs including lack of use of adaptive classifier. | ||
| Added ifdefs to eliminate graphics code and add embedded platform support. | ||
| Incorporated several patches, including 64-bit builds, Mac builds. | ||
| Minor accuracy improvements. | ||
| May 15 2007 - V1.04 | ||
| Added dll exports for Windows. | ||
| Fixed name collisions with stl etc. | ||
| Made some preliminary changes ready for unicodeization. | ||
| Several bug fixes discovered during unicodeization. | ||
| July 02 2007 - V2.00 | ||
| Converted internal character handling to UTF8. | ||
| Trained with 6 languages. | ||
| Added unicharset_extractor, wordlist2dawg. | ||
| Added boxfile creation mode. | ||
| Added UNLV regression test capability. | ||
| Fixed problems with copyright and registered symbols. | ||
| Fixed extern "C" declarations problem. | ||
| August 27 2007 - V2.01 | ||
| Fixed UTF8 input problems with box file reader. | ||
| Fixed various infinite loops and crashes in dawg code. | ||
| Removed include of config_auto.h from host.h. | ||
| Added automatic wctype encoding to unicharset_extractor. | ||
| Fixed dawg table too full error. | ||
| Removed svn files from tarball. | ||
| Added new functions to tessdll. | ||
| Increased maximum utf8 string in a classification result to 8. | ||
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| January 23 2008 - V2.02 | ||
| Improvements to clustering, training and classifier. | ||
| Major internationalization improvements for large-character-set | ||
| languages, eg Kannada. | ||
| Removed some compiler warnings. | ||
| Added multipage tiff support for training and running. | ||
| Updated graphics output to talk to new java-based viewer. | ||
| Added ability to save n-best lists. | ||
| Added leptonica support for more file types. | ||
| Improved Init/End to make them safe. | ||
| Reduced memory use of dictionaries. | ||
| Added some new APIs to TessBaseAPI. | ||
| April 21 2008 - V2.02 (again) | ||
| Fixed namespace collisions with jpeg library (INT32). | ||
| Portability fixes for Windows for new code. | ||
| Updates to autoconf system for new code. | ||
| April 22 2008 - V2.03 | ||
| Fixed crash introduced in 2.02. | ||
| Fixed lack of tessembedded.cpp in distribution. | ||
| Added test for leptonica header files and conditional test for lib. | ||
| June 30 2009 - V2.04 | ||
| Integrated bug fixes and patches and misc changes for portability. | ||
| Integrated a patch to remove some of the "access" macros. | ||
| Removed dependence on lua from the viewer, speeding it up | ||
| dramatically. | ||
| Fixed the viewer so it compiles and runs properly! | ||
| Specifically fixing issues: 1, 63, 67, 71, 76, 81, 82, 106, 111, | ||
| 112, 128, 129, 130, 133, 135, 142, 143, 145, 147, 153, 154, 160, | ||
| 165, 170, 175, 177, 187, 192, 195, 199, 201, 205, 209, 108, 169 |
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