5.0.0-rc1

This is the first release candidate of Tesseract 5.0.0.

• Enable fast float32 LSTM by default
• Switch to NFC normalisation everywhere
• Remove banner message
• Disable music staff detection and removal
• Add new command line option --loglevel
• Bug fixes

See also list of all changes.

5.0.0-beta-20210916

This is a new pre-release of Tesseract 5.0.0.

• Bug fixes
• Extend URI support for Tesseract with libcurl
• Rename processed TIFF output file and add page number if needed

See also list of all changes.

5.0.0-beta-20210815

This is a new pre-release of Tesseract 5.0.0.

• Bug fixes
• Modernize more code
• More options for binarization
• Improved support for ARM NEON
• No longer depends on Abseil for unit tests
• Support float for model training and text recognition (faster, requires less RAM)

See also list of all changes.

5.0.0-alpha-20210401

This is a new pre-release of Tesseract 5.0.0.

• Replaced all remaining STRING by std::string
• Replaced lots of GenericVector by std::vector
• Replaced all malloc / free by C++ code
• Modernized and formatted code

See also list of all changes.

5.0.0-alpha-20201231

This is a new pre-release of Tesseract 5.0.0.

It has massive changes in the public API which is a great step towards a final 5.0.0.
All unit tests pass, but because of those changes more practical experience is needed.

• the public API no longer uses proprietary data types GenericVector, STRING
• pdf.ttf is no longer needed because it is now integrated into the code

See also list of all changes.

5.0.0-alpha-20201224

This is a new pre-release of Tesseract 5.0.0.

It is considered to be production ready for end users, but nevertheless not stable because more incompatible API changes are planned.

• improved performance (also on ARM / ARM64)
• improved unit tests
• many fixes
• faster flat build with automake
• support for latest macOS (including new M1 processor)

See also list of all changes.

4.1.1 Release

• Implemented sw build (cppan is deprecated)
• Improved cmake build
• Code cleanup and optimization
• A lot of bug fixes...

4.1.0 Release

• Added new renderers Alto, LSTMBox, WordStrBox.
• Added character boxes in hOCR output.
• Added python training scripts (experimental) as alternative shell scripts.
• Better support AVX / AVX2 / SSE.
• Disable OpenMP support by default (see e.g. #1171, #1081).
• Fix for bounding box problem.
• Implemented support for whitelist/blacklist in LSTM engine.
• Improved cmake configuration.
• Code modernization and improvements.
• A lot of bug fixes...

Detailed changelog is on wiki.

Windows installer can be downloaded from https://github.com/UB-Mannheim/tesseract/wiki.

4.0.0 Release

Detailed Release notes, Changelog and documentation can be found in project wiki.

Windows installer can be downloaded from https://github.com/UB-Mannheim/tesseract/wiki.

3.05.02 Release

Bug fix release