mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-11-24 19:19:05 +08:00
e0d735b122
git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@658 d0cd1f9f-072b-0410-8dd7-cf729c803f20
175 lines
9.5 KiB
Plaintext
175 lines
9.5 KiB
Plaintext
2012-02-01 - v3.02
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* Moved ResultIterator/PageIterator to ccmain.
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* Added Right-to-left/Bidi capability in the output iterators for Hebrew/Arabic.
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* Added paragraph detection in layout analysis/post OCR.
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* Fixed inconsistent xheight during training and over-chopping.
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* Added simultaneous multi-language capability.
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* Refactored top-level word recognition module.
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* Added experimental equation detector.
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* Improved handling of resolution from input images.
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* Blamer module added for error analysis.
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* Cleaned up externally used namespace by removing includes from baseapi.h.
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* Removed dead memory mangagement code.
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* Tidied up constraints on control parameters.
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* Added support for ShapeTable in classifier and training.
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* Refactored class pruner.
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* Fixed training leaks and randomness.
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* Major improvements to layout analysis for better image detection, diacritic detection, better textline finding, better tabstop finding.
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* Improved line detection and removal.
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* Added fixed pitch chopper for CJK.
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* Added UNICHARSET to WERD_CHOICE to make mult-language handling easier.
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* Fixed problems with internally scaled images.
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* Added page and bbox to string in tr files to identify source of training data better.
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* Fixes to Hindi Shiroreka splitter.
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* Added word bigram correction.
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* Reduced stack memory consumption and eliminated some ugly typedefs.
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* Added new uniform classifier API.
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* Added new training error counter.
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* Fixed endian bug in dawg reader.
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* 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
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* Removed old/dead serialise/deserialze methods on *LISTIZED classes.
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* Total rewrite of DENORM to better encapsulate operation and make
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for potential to extract features from images.
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* 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.
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* 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.*
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* `OcrEngineMode` in `Init` replaces `AccuracyVSpeed` to control cube.
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* Greatly improved segmentation search with consequent accuracy and speed improvements, especially for Chinese.
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* 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.
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* 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.
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* Auto orientation and script detection added to page layout analysis.
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* Deleted *lots* of dead code.
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* Fixxht module replaced with scalable data-driven module.
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* Output font characteristics accuracy improved.
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* Removed the double conversion at each classification.
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* Upgraded oldest structs to be classes and deprecated PBLOB.
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* Removed non-deterministic baseline fit.
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* Added fixed length dawgs for Chinese.
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* Handling of vertical text improved.
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* Handling of leader dots improved.
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* Table detection greatly improved.
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* Fixed a couple of memory leaks.
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* Fixed font labels on output text. (Not perfect, but a lot better than before.)
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* Cleanup and more bug fixes
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* Special treatments for Hindi.
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* 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
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* Preparations for thread safety:
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* Changed TessBaseAPI methods to be non-static
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* Created a class hierarchy for the directories to hold instance data,
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and began moving code into the classes.
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* Moved thresholding code to a separate class.
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* Added major new page layout analysis module.
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* Added HOCR output (issues 221, 263: thanks to amkryukov).
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* Added Leptonica as main image I/O and handling. Currently optional,
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but in future releases linking with Leptonica will be mandatory.
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* Ambiguity table rewritten to allow definite replacements in place
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of fix_quotes.
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* Added TessdataManager to combine data files into a single file.
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* Some dead code deleted.
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* VC++6 no longer supported. It can't cope with the use of templates.
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* Many more languages added.
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* Doxygenation of most of the function header comments.
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* Added man pages.
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* Added bash completion script (issue 247: thanks to neskiem)
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* Fix integer overview in thresholding (issue 366: thanks to Cyanide.Drake)
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* Add Danish Fraktur support (issues 300, 360: thanks to
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dsl602230@vip.cybercity.dk)
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* Fix file pointer leak (issue 359, thanks to yukihiro.nakadaira)
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* Fix an error using user-words (Issue 345: thanks to max.markin)
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* Fix a memory leak in tablefind.cpp (Issue 342, thanks to zdravco)
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* Fix a segfault due to double fclose (Issue 320, thanks to souther)
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* Fix an automake error (Issue 318, thanks to ichanjz)
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* Fix a Win32 crash on fileFormatIsTiff() (Issues 304, 316, 317, 330, 347,
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349, 352: thanks to nguyenq87, max.markin, zdenop)
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* Fixed a number of errors in newer (stricter) versions of VC++ (Issues
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301, among others)
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2010-07-19 gettextize <bug-gnu-gettext@gnu.org>
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* m4/gettext.m4: New file, from gettext-0.17.
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* m4/iconv.m4: New file, from gettext-0.17.
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* m4/lib-ld.m4: New file, from gettext-0.17.
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* m4/lib-link.m4: New file, from gettext-0.17.
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* m4/lib-prefix.m4: New file, from gettext-0.17.
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* m4/nls.m4: New file, from gettext-0.17.
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* m4/po.m4: New file, from gettext-0.17.
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* m4/progtest.m4: New file, from gettext-0.17.
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* Makefile.am (SUBDIRS): Add po.
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(EXTRA_DIST): Add config/config.rpath.
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* configure.ac (AC_CONFIG_FILES): Add po/Makefile.in.
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June 2006 - V1.0 of open source Tesseract checked-in.
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Sep 7 2006 - V1.01.
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Added mfcpch.cpp and getopt.cpp for VC++.
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Fixed problem with greyscale images and no libtiff.
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Stopped debug window from being used for the usage output.
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Fixed load of inttemp for big-endian architectures.
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Fixed some Mac compilation issues.
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Oct 4 2006 - V1.02
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Removed dependency on Aspirin.
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Fixed a few missing Apache license headers.
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Removed $log.
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Feb 2 2007 - V1.03
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Added mftraining and cntraining.
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Added baseapi with adaptive thresholding for grey and color.
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Fixed many memory leaks.
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Fixed several bugs including lack of use of adaptive classifier.
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Added ifdefs to eliminate graphics code and add embedded platform support.
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Incorporated several patches, including 64-bit builds, Mac builds.
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Minor accuracy improvements.
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May 15 2007 - V1.04
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Added dll exports for Windows.
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Fixed name collisions with stl etc.
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Made some preliminary changes ready for unicodeization.
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Several bug fixes discovered during unicodeization.
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July 02 2007 - V2.00
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Converted internal character handling to UTF8.
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Trained with 6 languages.
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Added unicharset_extractor, wordlist2dawg.
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Added boxfile creation mode.
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Added UNLV regression test capability.
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Fixed problems with copyright and registered symbols.
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Fixed extern "C" declarations problem.
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August 27 2007 - V2.01
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Fixed UTF8 input problems with box file reader.
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Fixed various infinite loops and crashes in dawg code.
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Removed include of config_auto.h from host.h.
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Added automatic wctype encoding to unicharset_extractor.
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Fixed dawg table too full error.
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Removed svn files from tarball.
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Added new functions to tessdll.
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Increased maximum utf8 string in a classification result to 8.
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January 23 2008 - V2.02
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Improvements to clustering, training and classifier.
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Major internationalization improvements for large-character-set
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languages, eg Kannada.
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Removed some compiler warnings.
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Added multipage tiff support for training and running.
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Updated graphics output to talk to new java-based viewer.
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Added ability to save n-best lists.
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Added leptonica support for more file types.
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Improved Init/End to make them safe.
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Reduced memory use of dictionaries.
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Added some new APIs to TessBaseAPI.
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April 21 2008 - V2.02 (again)
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Fixed namespace collisions with jpeg library (INT32).
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Portability fixes for Windows for new code.
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Updates to autoconf system for new code.
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April 22 2008 - V2.03
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Fixed crash introduced in 2.02.
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Fixed lack of tessembedded.cpp in distribution.
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Added test for leptonica header files and conditional test for lib.
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June 30 2009 - V2.04
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Integrated bug fixes and patches and misc changes for portability.
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Integrated a patch to remove some of the "access" macros.
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Removed dependence on lua from the viewer, speeding it up
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dramatically.
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Fixed the viewer so it compiles and runs properly!
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Specifically fixing issues: 1, 63, 67, 71, 76, 81, 82, 106, 111,
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112, 128, 129, 130, 133, 135, 142, 143, 145, 147, 153, 154, 160,
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165, 170, 175, 177, 187, 192, 195, 199, 201, 205, 209, 108, 169
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