Should DNN backend and target default to CPU if no GPU found?

Python
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4

successfully using CUDA for the dnn depends on a few things:

  • the cv2.so must have been compiled on a cuda capable machine, wth a cuda SDK, also with cmake flags like WITH_CUDNN=1, WITH_CUBLAS=1, WITH_OPENCV_CUDA_DNN=1

  • the current machine actually cuda capable hardware