OpenCV not utilising Cuda

[isaac-223]

I have installed OpenCV using GitHub - AastaNV/JEP this link, if I do print(cv2.getBuildInformation()), I could see CUDA: YES, but when I use the code I don’t see any movement of GPU in jtop, how can I verify if I have correctly installed OpenCV cuda?

[Honey_Patouceul]

You may read:

OpenCV no Cuda?

Be aware that there is no automatic backend selection in opencv. For using GPU on Jetson, you would have to use opencv_cuda modules, using GpuMat instead of cv::Mat. Only a subset of opencv algorithms are supported with opencv_cuda modules, and sometimes the results may be different. Support for opencv cuda programming might be be limited in python.