Howtosignalprocessing
What is ORB feature matching?
ORB is a fusion of FAST keypoint detector and BRIEF descriptor with some added features to improve the performance. FAST is Features from Accelerated Segment Test used to detect features from the provided image. It also uses a pyramid to produce multiscale-features.
How does ORB work in OpenCV?
ORB is basically a fusion of FAST keypoint detector and BRIEF descriptor with many modifications to enhance the performance. First it use FAST to find keypoints, then apply Harris corner measure to find top N points among them. It also use pyramid to produce multiscale-features.
What is brute-force matching?
A brute-force matcher is a descriptor matcher that compares two sets of keypoint descriptors and generates a result that is a list of matches. It is called brute-force because little optimization is involved in the algorithm.
