Abstract:

Affine-SIFT is fully affine invariant but its computation is time-consuming. Oriented FAST and Rotated BRIEF (ORB) is extremely fast but is not affine invariant. In order to solve the problem that it is difficult to balance the good affine invariance and the real-time performance in image matching, a new fast method (AORB, Affine-ORB) for fully affine invariant image matching based on ORB, which applies the ASIFT method simulated in all views to obtain the full affine invariance of ORB, is proposed. Firstly, it simulates enough image views obtainable by varying the viewpoints of camera. Secondly, all simulated image pairs are matched using fast ORB. Thus, the full affine invariance is obtained. Experimental results show that proposed method is efficient in fully affine invariant image matching and it is 6 times faster than ASIFT.

Key words: ORB;ASIFT;affine-SIFT;affine invariant;image matching