c++ - Connected Components in OpenCV 3.4.0 with with cuda (on GPU)

Question

I wrote a program with c++ and OpenCV 3.4.0 for connected components labeling.

I used ConnectedComponentsWithStats function for it. Now I can write same program with OpenCV + cuda. But OpenCV does not have ConnectedComponentsWithStats function for cuda.

Somebody said to me that I must use labelComponents function for it, but when I write cv::cuda::labelComponents, C++ say to me :

"cv::cuda::" has no member "labelComponents"

Answer 1

It is indeed in cv::cuda:labelComponents

1. Did you compile with legacy support?
2. Did you include the appropriate header file? I believe it is "opencv2/cudalegacy/cudalegacy.hpp" See: cudalegacy.hpp File Reference