What is ORB? How to implement ORB in Computer Vision?
The Full form off ORB is Oriented Fast and Rotated BRIEF. ORB performs as well as SIFT on the task of feature detection (and is better than SURF) while being almost two orders of magnitude faster. ORB builds on the well-known FAST keypoint detector and the BRIEF descriptor. Both of these techniques are attractive because of their good performance and low cost. ORB’s main contributions are as follows:
The addition of a fast and accurate orientation component to FAST
The efficient computation of oriented BRIEF features
Analysis of variance and correlation of oriented BRIEF features
A learning method for decorrelating BRIEF features under rotational invariance, leading to better performance in nearest-neighbor applications.