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Hello, I have run detectMultiScale with CUDA on a Dell T7600 with 2 CPU (each has 4 cores, 1.8 Ghz) and Quadro 4000 as well as TBB CPU version of that function but the results I got is not the same as yours: + TBB (4.2 update 2) CPU version only utilized about 60% of CPU resources and can work with a 14 fps rate. + CUDA version (5.5) just used 1 CPU core and reached 24 fps rate. I used opencv dev-3.0.0 build with VS 2012 update 4 on Windows 7 32 bit, CUDA 5.5. I think you should build Opencv with CUDA on your own to have better results.

Hello, I have run detectMultiScale with CUDA on a Dell T7600 with 2 CPU (each has 4 4 cores, 1.8 Ghz) and Quadro 4000 as well as TBB CPU version of that function function but the results I got is not the same as yours: + TBB (4.2 update 2) CPU version only utilized about 60% of CPU resources resources and can work with a 14 fps rate. + CUDA version (5.5) just used 1 CPU core and reached 24 fps rate. I used opencv dev-3.0.0 build 3.0.0-dev built with VS 2012 update 4 on Windows 7 32 bit, bit, CUDA 5.5. I think you should build Opencv with CUDA on your own to have have better results.