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

3.05.01 Release

Bug fix release

3.05.00 Release

• Made some fine tuning to the hOCR output.
  • Added TSV as another optional output format.
  • Fixed ABI break introduced in 3.04.00 with the AnalyseLayout() method.
  • text2image tool - Enable all OpenType ligatures available in a font. This feature requires Pango 1.38 or newer.
  • Training tools - Replaced asserts with tprintf() and exit(1).
  • Fixed Cygwin compatibility.
  • Improved multipage tiff processing.
  • Improved the embedded pdf font (pdf.ttf).
  • Enable selection of OCR engine mode from command line.
  • Changed tesseract command line parameter '-psm' to '--psm'.
  • Added new C API for orientation and script detection, removed the old one.
  • Increased minimum autoconf version to 2.59.
  • Removed dead code.
  • Fixed many compiler warning.
  • Fixed memory and resource leaks.
  • Fixed some issues with the 'Cube' OCR engine.
  • Fixed some openCL issues.
  • Added option to build Tesseract with CMake build system.
  • Implemented CPPAN support for easy Windows building.