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Open Source Computer Vision Library
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Maksim Shabunin f37924796f
Merge pull request #25364 from mshabunin:fix-unaligned-filter 
imgproc: fix unaligned memory access in filters and Gaussian blur #25364

* filter/SIMD: removed parts which casted 8u pointers to int causing unaligned memory access on RISC-V platform.
* GaussianBlur/fixed_point: replaced casts from s16 to u32 with union operations

Performance comparison:
- [x] check performance on x86_64 - (4 threads, `-DCPU_BASELINE=AVX2`, GCC 11.4, Ubuntu 22) - [report_imgproc_x86_64.ods](https://github.com/opencv/opencv/files/14904702/report_x86_64.ods)
- [x] check performance on AArch64 - (4 cores of RK3588, GCC 11.4 aarch64, Raspbian) - [report_imgproc_aarch64.ods](https://github.com/opencv/opencv/files/14908437/report_aarch64.ods)

Note: for some reason my performance results are quite unstable, unaffected functions show speedups and slowdowns in many cases. Filter2D and GaussianBlur seem to be OK.

Slightly related PR: https://github.com/opencv/ci-gha-workflow/pull/165
2024-04-09 17:44:36 +03:00
.github Added job to test with real hardware. 2024-01-31 15:05:19 +03:00
3rdparty fix download file hash value mismatch issue 2024-04-01 10:32:37 +08:00
apps Partially back-port #25075 to 4.x 2024-03-05 12:15:39 +03:00
cmake Merge pull request #25257 from Kumataro:fix25256 2024-03-25 08:58:30 +03:00
data Merge pull request #22727 from su77ungr:patch-1 2022-11-17 06:54:25 +00:00
doc typo in env_reference.markdown 2024-04-06 20:07:10 +02:00
include exclude opencv_contrib modules 2020-02-26 15:12:45 +03:00
modules Merge pull request #25364 from mshabunin:fix-unaligned-filter 2024-04-09 17:44:36 +03:00
platforms Merge pull request #25190 from klatism:android-config-flags-enhancement 2024-03-27 15:10:40 +03:00
samples Merge pull request #25357 from cabelo:yolov8m 2024-04-09 16:56:07 +03:00
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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
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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