OpenCV and GPU

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Thank you friend for you response

my opencv do not know "labelcomponents" function !!!

Have you included the following header?

#include "opencv2/cudalegacy.hpp"

see https://github.com/opencv/opencv/blob... line 165 for its usage.

Thank you. I include it now . But I have some errors now. error : Severity Code Description Project File Line Suppression State Error C1083 Cannot open include file: 'cuda_runtime.h': No such file or directory ConsoleApplication3 c:\opencv 3.4.0\build\install\include\opencv2\core\cuda\common.hpp 46

As I said above the code is legacy and probably doesn't work correctly.

Are you sure you need connected components with stats on the GPU? I ask because from memory the CPU routine is not that slow. Additionally if you need to know the size of your connected regions before you can do any additional processing on the GPU (which is usually the case with CCL, at least in my experience) you will have to either a) stall the GPU to retrieve this information, possibly loosing any gain you have made, or b) come up with a strategy to hide this latency by performing some additional processing on the GPU, while you wait.

I understand that your data may already be on the GPU but if your workflow represents case b) then an async copy back to the host for processing there may be a better option.

Yes dear. I am sure that I need GPU for connected components. Becuase I am working on a real time video processing and speed is so important for me. Why only I have problem with #include "opencv2/cudalegacy.hpp" ?!

do you have any refer for me?

thank you