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CHANGELOG.md

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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[0.8.0] - 2024-05-25

Breaking changes

This release changes Ocrs's internal use of threads, which may affect consumers that are using their own parallelism. Specifically Ocrs no longer uses the global Rayon thread pool but instead a custom thread pool which is sized to match the number of physical rather than logical cores. See #79 for more details and information on adapting.

Changes

  • Updated rten to v0.10.0. This improves performance when recognizing long lines of text (#79) and improves efficiency by setting the number of threads to match the number of physical cores.

  • Errors that occur when running the text recognition model are now propagated to the caller instead of causing a panic (#77)

[0.7.0] - 2024-05-16

Breaking changes

The APIs for loading models and images have changed in this release to make them more efficient and easier to use. See the updated hello_ocr example.

Changes

  • Updated rten to v0.9.0. This brings a simpler API for loading models from disk (Model::load_file) and improves performance (#76)

  • Updated image crate. This includes a much faster JPEG decoder (#58)

  • Re-designed the API for loading images to be easier to use and more efficient (#56).

[0.6.0] - 2024-04-29

  • Updated rten to v0.8.0. This fixes a crash on x86-64 CPUs that don't support AVX2 instructions and includes several performance improvements #53.

  • Added --text-mask flag to CLI which saves a binarized version of the text probability mask as an image (#38)

  • Made it easier to run examples (#41)

[0.5.0] - 2024-02-28

  • Improve recognition accuracy for long text lines, at the cost of longer inference times, by increasing max image width after preprocessing #32

  • Added --text-line-images option to save previews of text lines after preprocessing. This is useful for debugging recognition accuracy issues #29, #30.

  • Added a note in the README about the importance of building ocrs (or at least the rten dependencies) in release mode #28

  • Updated rten to 0.4.0. This includes optimizations for post-processing of the text segmentation mask #23.

[0.4.0] - 2024-01-23

  • Updated rten to v0.3.1. This improves performance on Arm by ~30%.

  • Fix panic in layout analysis when average word spacing in a line is negative #20

  • Added LICENSE files to repository (Apache 2, MIT) #12

[0.3.1] - 2024-01-03

  • Fix cache directory location on Windows #9

  • Improved speed on ARM by ~16% 9224ac9

[0.3.0] - 2024-01-02

  • Extract the ocrs project out of the RTen repository and into a standalone repo at https://github.com/robertknight/ocrs.

  • Improve the --json output format with extracted text and coordinates of the rotated bounding rect for each word and line (92f17fb).

[0.2.1] - 2024-01-01

  • Update rten to fix incorrect output on non-x64 / wasm32 platforms

[0.2.0] - 2024-01-01

  • Improve layout analysis (ce52b3a1, cefb6c3f). The longer term plan is to use machine learning for layout analysis, but these incremental tweaks address some of the most egregious errors.
  • Add --version flag to CLI (20055ee0)
  • Revise CLI flags for specifying output format (97c3a011). The output path is now specified with -o. Available formats are text (default), JSON (--json) or annotated PNG (--png).
  • Fixed slow OCR model downloads by changing hosting location (robertknight/rten#22).

[0.1.0] - 2023-12-31

Initial release.