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Created August 3, 2020 20:39
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Some notes on OpenCV CUDA APIs
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cv-cuda.md

Notes from OpenCV 4.4.0.

The CUDA APIs are mostly in the cv2.cuda module except a few that are in cv2 such as cv2.cuda_GpuMat and cv2.cuda_Stream.

cv2.cuda_FarnebackOpticalFlow has the same interface as cv2.FarnebackOpticalFlow.

cv2.cuda.createMorphologyFilter doesn't support 3 channel filters.

You must provide the output array to cv2.cuda.merge(_, output). The API doesn't return a GpuMat instance.

cv2.cuda.multiply doesn't accept scalar arguments, instead initialize a matrix initialized to the same value everywhere, e.g., cv2.cuda_GpuMat(frame.size(), cv.CV_32FC1, 255 / (2*np.pi)).

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