opencv 3, blobdetection, The function/feature is not implemented () in detectAndCompute

Question

I have a problem with opencv 3: I want to use a feature detector, SimpleBlobDetector, about to use filters by convexity and circularity. But when I try to execute the code, the

Answer 1

Just use detect(...) and not detectAndCompute(...). There is no feature descriptor defined for blob detection.

See here: https://stackoverflow.com/a/11079868/1611317