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Merge pull request #27299 from amd:fast_medianblur_simd

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imgproc: medianblur: Performance improvement #27299

* Bottleneck in non-vectorized path reduced.
* AVX512 dispatch added for medianblur.

### 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
- [x] 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
This commit is contained in:
Madan mohan Manokar 2025-05-19 11:26:57 +05:30 committed by GitHub
parent 250b5003ee
commit 84ea77a4be
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2 changed files with 20 additions and 3 deletions
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2
modules/imgproc/CMakeLists.txt
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@ -6,7 +6,7 @@ ocv_add_dispatched_file(filter SSE2 SSE4_1 AVX2)
ocv_add_dispatched_file(color_hsv SSE2 SSE4_1 AVX2)
ocv_add_dispatched_file(color_rgb SSE2 SSE4_1 AVX2)
ocv_add_dispatched_file(color_yuv SSE2 SSE4_1 AVX2)
ocv_add_dispatched_file(median_blur SSE2 SSE4_1 AVX2)
ocv_add_dispatched_file(median_blur SSE2 SSE4_1 AVX2 AVX512_SKX)
ocv_add_dispatched_file(morph SSE2 SSE4_1 AVX2)
ocv_add_dispatched_file(smooth SSE2 SSE4_1 AVX2)
ocv_add_dispatched_file(sumpixels SSE2 AVX2 AVX512_SKX)

21
modules/imgproc/src/median_blur.simd.hpp
View File

@ -13,6 +13,7 @@
// Copyright (C) 2000-2008, 2018, Intel Corporation, all rights reserved.
// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
// Copyright (C) 2014-2015, Itseez Inc., all rights reserved.
// Copyright (C) 2025, Advanced Micro Devices, all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
@ -693,8 +694,16 @@ medianBlur_SortNet( const Mat& _src, Mat& _dst, int m )
#else
int nlanes = 1;
#endif
for( ; j <= size.width - nlanes - cn; j += nlanes )
for (; j < size.width - cn; j += nlanes)
{
//handling tail in vectorized path itself
if ( j > size.width - cn - nlanes ) {
if (j == cn || src == dst) {
break;
}
j = size.width - cn - nlanes;
}
VT p0 = vop.load(row0+j-cn), p1 = vop.load(row0+j), p2 = vop.load(row0+j+cn);
VT p3 = vop.load(row1+j-cn), p4 = vop.load(row1+j), p5 = vop.load(row1+j+cn);
VT p6 = vop.load(row2+j-cn), p7 = vop.load(row2+j), p8 = vop.load(row2+j+cn);
@ -705,6 +714,7 @@ medianBlur_SortNet( const Mat& _src, Mat& _dst, int m )
vop(p3, p6); vop(p1, p4); vop(p2, p5); vop(p4, p7);
vop(p4, p2); vop(p6, p4); vop(p4, p2);
vop.store(dst+j, p4);
}
limit = size.width;
@ -798,8 +808,14 @@ medianBlur_SortNet( const Mat& _src, Mat& _dst, int m )
#else
int nlanes = 1;
#endif
for( ; j <= size.width - nlanes - cn*2; j += nlanes )
for( ; j < size.width - cn*2; j += nlanes)
{
if ( j > size.width - cn*2 - nlanes ) {
if (j == cn*2 || src == dst) {
break;
}
j = size.width - cn*2 - nlanes;
}
VT p0 = vop.load(row[0]+j-cn*2), p5 = vop.load(row[1]+j-cn*2), p10 = vop.load(row[2]+j-cn*2), p15 = vop.load(row[3]+j-cn*2), p20 = vop.load(row[4]+j-cn*2);
VT p1 = vop.load(row[0]+j-cn*1), p6 = vop.load(row[1]+j-cn*1), p11 = vop.load(row[2]+j-cn*1), p16 = vop.load(row[3]+j-cn*1), p21 = vop.load(row[4]+j-cn*1);
VT p2 = vop.load(row[0]+j-cn*0), p7 = vop.load(row[1]+j-cn*0), p12 = vop.load(row[2]+j-cn*0), p17 = vop.load(row[3]+j-cn*0), p22 = vop.load(row[4]+j-cn*0);
@ -830,6 +846,7 @@ medianBlur_SortNet( const Mat& _src, Mat& _dst, int m )
vop(p13, p17); vop(p3, p15); vop(p11, p23); vop(p11, p15); vop(p7, p19);
vop(p7, p11); vop(p11, p13); vop(p11, p12);
vop.store(dst+j, p12);
}
limit = size.width;