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Faster implementation of blobFromImages for cpu nchw output by alexlyulkov · Pull Request #26127 · opencv/opencv · GitHub
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@alexlyulkov please add performance test. |
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@fengyuentau, after you finish with C3 optimization in warping functions and before you move to bicubic case optimization, may I ask you to take a look at it? We need to compare speed of this implementation with existing one in 4.x and 5.x branches. |
fengyuentau
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@vpisarev @asmorkalov This patch generally brings better performance regardless 4.x or 5.x branch, although I only tested on my Macbook Air with M1. See below for detailed performance testing results. Code for perfomance testing: fengyuentau@b01f28c
Geometric mean (ms)
Name of Test base-4x patch-4x patch-4x
vs
base-4x
(x-factor)
HWC_TO_NCHW::Utils_blobFromImage::{ 32, 32 } 0.005 0.001 5.00
HWC_TO_NCHW::Utils_blobFromImage::{ 64, 64 } 0.013 0.001 8.94
HWC_TO_NCHW::Utils_blobFromImage::{ 128, 128 } 0.052 0.009 5.53
HWC_TO_NCHW::Utils_blobFromImage::{ 256, 256 } 0.205 0.037 5.58
HWC_TO_NCHW::Utils_blobFromImage::{ 512, 512 } 0.935 0.274 3.42
HWC_TO_NCHW::Utils_blobFromImage::{ 1024, 1024 } 3.246 0.671 4.84
HWC_TO_NCHW::Utils_blobFromImage::{ 2048, 2048 } 15.888 5.352 2.97
HWC_TO_NCHW::Utils_blobFromImages::{ 16, 32, 32 } 0.068 0.011 6.41
HWC_TO_NCHW::Utils_blobFromImages::{ 16, 64, 64 } 0.212 0.032 6.68
HWC_TO_NCHW::Utils_blobFromImages::{ 16, 128, 128 } 0.921 0.261 3.53
HWC_TO_NCHW::Utils_blobFromImages::{ 16, 256, 256 } 4.046 1.315 3.08
HWC_TO_NCHW::Utils_blobFromImages::{ 16, 512, 512 } 16.397 5.695 2.88
HWC_TO_NCHW::Utils_blobFromImages::{ 16, 1024, 1024 } 64.182 21.845 2.94
HWC_TO_NCHW::Utils_blobFromImages::{ 16, 2048, 2048 } 255.997 86.815 2.95
Geometric mean (ms)
Name of Test base-5x patch-5x patch-5x
vs
base-5x
(x-factor)
HWC_TO_NCHW::Utils_blobFromImage::{ 32, 32 } 0.005 0.001 5.17
HWC_TO_NCHW::Utils_blobFromImage::{ 64, 64 } 0.013 0.001 8.68
HWC_TO_NCHW::Utils_blobFromImage::{ 128, 128 } 0.050 0.009 5.34
HWC_TO_NCHW::Utils_blobFromImage::{ 256, 256 } 0.189 0.036 5.19
HWC_TO_NCHW::Utils_blobFromImage::{ 512, 512 } 0.910 0.433 2.10
HWC_TO_NCHW::Utils_blobFromImage::{ 1024, 1024 } 3.239 0.663 4.88
HWC_TO_NCHW::Utils_blobFromImage::{ 2048, 2048 } 15.499 9.550 1.62
HWC_TO_NCHW::Utils_blobFromImages::{ 16, 32, 32 } 0.067 0.011 5.85
HWC_TO_NCHW::Utils_blobFromImages::{ 16, 64, 64 } 0.207 0.035 5.98
HWC_TO_NCHW::Utils_blobFromImages::{ 16, 128, 128 } 0.902 0.450 2.00
HWC_TO_NCHW::Utils_blobFromImages::{ 16, 256, 256 } 3.893 2.279 1.71
HWC_TO_NCHW::Utils_blobFromImages::{ 16, 512, 512 } 15.899 9.360 1.70
HWC_TO_NCHW::Utils_blobFromImages::{ 16, 1024, 1024 } 61.762 23.486 2.63
HWC_TO_NCHW::Utils_blobFromImages::{ 16, 2048, 2048 } 249.740 94.881 2.63
BTW, I need to do the following changes so as to fix compile errors.
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@fengyuentau Could you push your commit to Alex's branch. He is on vocation now. |
Signed-off-by: Yuantao Feng <yuantao.feng@opencv.org.cn>
Signed-off-by: Yuantao Feng <yuantao.feng@opencv.org.cn>
asmorkalov
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asmorkalov
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Faster implementation of blobFromImages for cpu nchw output opencv#26127 Faster implementation of blobFromImage and blobFromImages for HWC cv::Mat images -> NCHW cv::Mat case Running time on my pc in ms: **blobFromImage** ``` image size old new speed-up 32x32x3 0.008 0.002 4.0x 64x64x3 0.021 0.009 2.3x 128x128x3 0.164 0.037 4.4x 256x256x3 0.728 0.158 4.6x 512x512x3 3.310 0.628 5.2x 1024x1024x3 14.503 3.124 4.6x 2048x2048x3 61.647 28.049 2.2x ``` **blobFromImages** ``` image size old new speed-up 16x32x32x3 0.122 0.041 3.0x 16x64x64x3 0.790 0.165 4.8x 16x128x128x3 3.313 0.652 5.1x 16x256x256x3 13.495 3.127 4.3x 16x512x512x3 58.795 28.127 2.1x 16x1024x1024x3 251.135 121.955 2.1x 16x2048x2048x3 1023.570 487.188 2.1x ``` 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. - [x] The feature is well documented and sample code can be built with the project CMake Update window_cocoa.mm
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shyama7004
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Faster implementation of blobFromImages for cpu nchw output opencv#26127 Faster implementation of blobFromImage and blobFromImages for HWC cv::Mat images -> NCHW cv::Mat case Running time on my pc in ms: **blobFromImage** ``` image size old new speed-up 32x32x3 0.008 0.002 4.0x 64x64x3 0.021 0.009 2.3x 128x128x3 0.164 0.037 4.4x 256x256x3 0.728 0.158 4.6x 512x512x3 3.310 0.628 5.2x 1024x1024x3 14.503 3.124 4.6x 2048x2048x3 61.647 28.049 2.2x ``` **blobFromImages** ``` image size old new speed-up 16x32x32x3 0.122 0.041 3.0x 16x64x64x3 0.790 0.165 4.8x 16x128x128x3 3.313 0.652 5.1x 16x256x256x3 13.495 3.127 4.3x 16x512x512x3 58.795 28.127 2.1x 16x1024x1024x3 251.135 121.955 2.1x 16x2048x2048x3 1023.570 487.188 2.1x ``` ### 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. - [x] The feature is well documented and sample code can be built with the project CMake
NanQin555
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Feb 24, 2025
Faster implementation of blobFromImages for cpu nchw output opencv#26127 Faster implementation of blobFromImage and blobFromImages for HWC cv::Mat images -> NCHW cv::Mat case Running time on my pc in ms: **blobFromImage** ``` image size old new speed-up 32x32x3 0.008 0.002 4.0x 64x64x3 0.021 0.009 2.3x 128x128x3 0.164 0.037 4.4x 256x256x3 0.728 0.158 4.6x 512x512x3 3.310 0.628 5.2x 1024x1024x3 14.503 3.124 4.6x 2048x2048x3 61.647 28.049 2.2x ``` **blobFromImages** ``` image size old new speed-up 16x32x32x3 0.122 0.041 3.0x 16x64x64x3 0.790 0.165 4.8x 16x128x128x3 3.313 0.652 5.1x 16x256x256x3 13.495 3.127 4.3x 16x512x512x3 58.795 28.127 2.1x 16x1024x1024x3 251.135 121.955 2.1x 16x2048x2048x3 1023.570 487.188 2.1x ``` ### 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. - [x] The feature is well documented and sample code can be built with the project CMake
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Faster implementation of blobFromImage and blobFromImages for
HWC cv::Mat images -> NCHW cv::Mat
case
Running time on my pc in ms:
blobFromImage
blobFromImages
Pull Request Readiness Checklist
See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request
Patch to opencv_extra has the same branch name.