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CUDA with OpenCV, STL transformation


I am writing my own CUDA kernel that should operate on matches I got using BFMatcher_GPU, with knnMatch algorithm in OpenCV. Matches are stored in std::vector<std::vector<cv::DMatch>> structure.

What would be the easiest and most efficient way to use those matches in my own CUDA kernel? Is the transfer to GpuMat necessary and how would it be done? Could Thrust library be used somehow?