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Open Source Computer Vision Library
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天音あめ ec5f7bb9f1
Merge pull request #27097 from amane-ame:blur_hal_rvv 
Add RISC-V HAL implementation for cv::blur series #27097

This patch implements `cv_hal_gaussianBlurBinomial`, `cv_hal_medianBlur`, `cv_hal_boxFilter` and `cv_hal_bilateralFilter` using native intrinsics, optimizing the performance of `cv::GaussianBlur/cv::medianBlur/cv::boxFilter/cv::bilateralFilter` for `3x3/5x5` kernels.

Tested on MUSE-PI (Spacemit X60) for both gcc 14.2 and clang 20.0.

```
$ ./opencv_test_imgproc --gtest_filter="*Filter*:*Blur*"
$ ./opencv_perf_imgproc --gtest_filter="*gauss*:*box*:*Bilateral*:*median*" --perf_min_samples=2000 --perf_force_samples=2000
```

View the full perf table here: [hal_rvv_blur.pdf](https://github.com/user-attachments/files/19335582/hal_rvv_blur.pdf)

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [ ] The PR is proposed to the proper branch
- [ ] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [ ] The feature is well documented and sample code can be built with the project CMake
2025-03-20 12:59:59 +03:00
.github Removed Android test as it's broken for now. 2025-02-18 12:52:24 +03:00
3rdparty Merge pull request #27097 from amane-ame:blur_hal_rvv 2025-03-20 12:59:59 +03:00
apps Remove useless C headers 2025-01-13 16:34:28 +01:00
cmake cmake/OpenCVDetectCUDAUtils.cmake: use IN_LIST to avoid regex matching valid capabilities 2025-02-13 23:47:00 +00:00
data Merge pull request #22727 from su77ungr:patch-1 2022-11-17 06:54:25 +00:00
doc Merge pull request #26441 from sturkmen72:upd_tutorials 2025-03-11 16:17:21 +03:00
include exclude opencv_contrib modules 2020-02-26 15:12:45 +03:00
modules fixed typo 2025-03-19 21:38:08 +05:30
platforms RISC-V: error message in the toolchain file when compiler is not found 2025-02-10 18:47:26 +03:00
samples Update optical_flow.cpp 2025-02-11 13:30:48 +03:00
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CMakeLists.txt fix: qnx7.0 build 2025-02-27 14:24:18 +08:00
CONTRIBUTING.md migration: github.com/opencv/opencv 2016-07-12 12:51:12 +03:00
COPYRIGHT copyright: 2023 (update) 2023-01-09 09:49:22 +00:00
LICENSE Merge pull request #18073 from vpisarev:apache2_license 2020-08-17 11:49:11 +00:00
README.md Space mistake in README.md 2024-03-03 23:37:07 +05:30
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README.md

OpenCV: Open Source Computer Vision Library

Resources

Contributing

Please read the contribution guidelines before starting work on a pull request.

Summary of the guidelines:

  • One pull request per issue;
  • Choose the right base branch;
  • Include tests and documentation;
  • Clean up "oops" commits before submitting;
  • Follow the coding style guide.

Additional Resources