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天音あめ
e89e2fd7ea
Add RISC-V HAL implementation for cv::cvtColor #27007 This patch implements the following functions in RVV_HAL using native intrinsics, optimizing the performance of `cv::cvtColor` for all possible data types and modes (except for `COLOR_Bayer`, `COLOR_YUV2GRAY_420` and `COLOR_mRGBA`, as these modes have no HAL interface): ``` cv_hal_cvtBGRtoBGR cv_hal_cvtBGRtoBGR5x5 cv_hal_cvtBGR5x5toBGR cv_hal_cvtBGRtoGray cv_hal_cvtGraytoBGR cv_hal_cvtBGR5x5toGray cv_hal_cvtGraytoBGR5x5 cv_hal_cvtBGRtoYUV cv_hal_cvtYUVtoBGR cv_hal_cvtBGRtoXYZ cv_hal_cvtXYZtoBGR cv_hal_cvtBGRtoHSV cv_hal_cvtHSVtoBGR cv_hal_cvtBGRtoLab cv_hal_cvtLabtoBGR cv_hal_cvtTwoPlaneYUVtoBGR cv_hal_cvtBGRtoTwoPlaneYUV cv_hal_cvtThreePlaneYUVtoBGR cv_hal_cvtBGRtoThreePlaneYUV cv_hal_cvtOnePlaneYUVtoBGR cv_hal_cvtOnePlaneBGRtoYUV ``` Tested on MUSE-PI (Spacemit X60) for both gcc 14.2 and clang 20.0. ``` $ ./opencv_test_imgproc --gtest_filter="*Color*-*Bayer*" $ ./opencv_perf_imgproc --gtest_filter="*Color*-*Bayer*" --gtest_also_run_disabled_tests --perf_min_samples=100 --perf_force_samples=100 ``` View the full perf table here: [hal_rvv_color.pdf](https://github.com/user-attachments/files/19055417/hal_rvv_color.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
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