CODEWITHSUNDEEP
c++opencvopenvx
Ken Y-N
Ken Y-N

Reputation: 15009

Copying cv::Mat to a vx_image

I'm looking at optimising some code with NVidia's OpenVX, and from previous experience with the CUDA API, GPU memory allocation is always a significant overhead.

So, I have a series of cv::Mat from video that I want to copy into an image; the naive code is of course:

vxImage = nvx_cv::createVXImageFromCVMat(context, cvMat);

The optimisation would be to allocate a single image, then just copy the bits on top. Looking at the header files (documentation is rather scant) I find:

nvx_cv::copyCVMatToVXMatrix(vxImage, cvMat);

However, the name is VXMatrix, so the compiler complains about a mismatch between the vx_matrix and vx_image types, of course. As far as I can tell, there is no copyCVMatToVXImage API; am I missing something, or is there another way to do this?

Upvotes: 0

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