5.2.0

This is a new minor version of Tesseract 5.

• Improvements and fixes for continuous integration,
  autoconf and cmake builds.
• Set /Os for some 32 bit MS compilers (fixes #3769).
• Improve comments and other documentation.
• Add initial support for Intel AVX512F.
• Fix for very large PDF files on 32 bit hosts (fixes #3805).
• Fix NEON detection on FreeBSD.
• Fix regression with UZN files (fixes #3837).
• Fix calling delete[] for memory allocated by malloc in C API.
• Add an API function to init tesseract with traineddata from memory
  (fixes #3691).
• Replace direct access to Leptonica internal data structures by
  function calls and support latest releases of Leptonica.
• Replace std::regex by std::string functions (fixes issue #3830).
• Use compiled-in TESSDATA_PREFIX also on Windows (fixes #3767).
• Add new parameter 'invert_threshold', change the default threshold
  from 0.5 to 0.7 and mark parameter 'tessedit_do_invert' as deprecated.

See also list of all changes.

5.1.0

This is a new minor version of Tesseract 5.

• Handle image and line regions in output formats ALTO, hOCR and text.
• New parameter curl_timeout for curl_easy_setop.
• Build fixes and improvements.
• Catch nullptr in PageIterator::Orientation to improve robustness.
• Remove unused code.

See also list of all changes.

5.0.1

This is a bug fix release of Tesseract 5.0.

• Add SPDX-License-Identifier to public include files.
• Support redirections when running OCR on a URL.
• Lots of fixes and improvements for cmake builds.
  Distributions should use the autoconf build.
• Fix broken msys2 build with gcc 11.
• Fix parameter certainty_scale (was duplicated).
• Fix some compiler warnings and clean code.
• Correctly detect amd64 and i386 on FreeBSD.
• Add libarchive and libcurl in continuous integration actions.
• Update submodule googletest to release v1.11.0.

See also list of all changes.

5.0.0

This is the final stable release of Tesseract 5.0.0.

• Limit BCER to interval [0,1]
• Improved build process
• Cleaned code

See also list of all changes.

5.0.0-rc3

This is the third release candidate of Tesseract 5.0.0.

• Improve training messages
• Add RowAttributes getter to PageIterator

See also list of all changes.

4.1.3

This is a new stable release of Tesseract 4.1.

• Fix broken autoconf build (issue #3642)

See also list of all changes.

5.0.0-rc2

This is the second release candidate of Tesseract 5.0.0.

• Fix regression for OCR with more than one model file
• Bug fixes
• Optimizations

See also list of all changes.

4.1.2

This is a new stable release of Tesseract 4.1.

Note: The autoconf build is broken (see issue #3642), so please use 4.1.3.

• Allow line images with larger width for training
• Bug fixes
• Build updates and fixes

See also list of all changes.

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.