Has anyone ever had this type of error while using SURF & FLANN (with Python) ?
Traceback (most recent call last): File "mainrefs.py", line 308, in <module> cv2.error: OpenCV(4.4.0) C:\opencv-4.4.0\opencv-4.4.0\modules\flann\include\opencv2\flann\nn_index.h:72: error: (-215:Assertion failed) queries.cols == veclen() in function 'cvflann::NNIndex<struct cvflann::L2<float> >::knnSearch'
matches = flann.knnMatch(np.asarray(c.des, np.float32), np.asarray(des, np.float32), 2)
c.des is my cropped image (the reference I use to compare) and des is my current frame.
Because during all my tests, I never had it, and today I have it one time in two and I don’t understand why.
I suppose it happens when my image has no keypoints or descriptors but I need a confirmation or an explanation