I am using OpenCV 2.4.3 release. When detecting features with ORB, all the keypoints are reported on the first octave (KeyPoint octave = 0). Consequently, all the KeyPoint sizes are the same. I've tried many parameters and looked at the code, but don't see an obvious bug. Is this a bug in the detector? Have others been able to get multi-scale ORB detections?
Thanks!