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Madan mohan Manokar
579a505734
core: SIMD optimizations for norm, distance and Hamming APIs. (Improves ORB & BRISK) #29335 Generic universal-intrinsic kernels (benefit all SIMD backends: NEON, AVX2, AVX-512, etc.), plus enabling wider dispatch for the norm module. - hal::normHamming: cached-pointer dispatch (resolve once, no per-call dispatch chain or trace region) + vector popcount path. cv::norm(NORM_HAMMING) and binary-descriptor matching (BFMatcher ORB/BRISK/FREAK via cv::batchDistance). - hal::normL2Sqr_ / normL1_: direct inlinable kernels with single-vector tail (cv::batchDistance / BFMatcher float L2/L1, cv::kmeans). - cv::norm masked NORM_INF: deinterleave SIMD for multichannel + back-step tail. - cv::norm(src1, src2, type, mask): SIMD masked norm-diff; INF is one templated kernel for all element types, plus uchar L1/L2 and int L1 kernels. - Enable AVX512_SKX/AVX512_ICL dispatch for the norm module. - features2d: add BFMatcher knnMatch perf tests (float L2/L1, binary Hamming). - ORB and BRISK performance improved ### 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 - [x] There is accuracy test, performance test and test data in opencv_extra repository, if applicable Patch to opencv_extra has the same branch name. - [x] The feature is well documented and sample code can be built with the project CMake
37 lines
1.2 KiB
C++
37 lines
1.2 KiB
C++
// This file is part of OpenCV project.
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// It is subject to the license terms in the LICENSE file found in the top-level directory
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// of this distribution and at http://opencv.org/license.html.
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//
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// Copyright (C) 2026, Advanced Micro Devices, Inc., all rights reserved.
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#include "precomp.hpp"
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#include "stat.simd.hpp"
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#include "stat.simd_declarations.hpp" // defines CV_CPU_DISPATCH_MODES_ALL=AVX2,...,BASELINE based on CMakeLists.txt content
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namespace cv { namespace hal {
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// Resolve the SIMD implementation ONCE via a cached function pointer. normHamming
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// is called per-descriptor in hot matcher loops on short (32/64-byte) descriptors,
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// where a per-call dispatch chain + CV_INSTRUMENT_REGION dominate the cost.
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static NormHammingFunc getNormHammingFunc() {
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CV_CPU_DISPATCH(getNormHammingFunc, (), CV_CPU_DISPATCH_MODES_ALL);
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}
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static NormHammingDiffFunc getNormHammingDiffFunc() {
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CV_CPU_DISPATCH(getNormHammingDiffFunc, (), CV_CPU_DISPATCH_MODES_ALL);
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}
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int normHamming(const uchar* a, int n)
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{
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static const NormHammingFunc fn = getNormHammingFunc();
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return fn(a, n);
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}
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int normHamming(const uchar* a, const uchar* b, int n)
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{
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static const NormHammingDiffFunc fn = getNormHammingDiffFunc();
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return fn(a, b, n);
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}
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}} //cv::hal
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