摘要
ASIFT具有完全仿射不变性,但计算耗时;ORB实时性好,但仿射不变性差。为了在图像匹配中同时兼顾仿射不变性和实时性,利用模拟相机在不同视点下成像的手段使得ORB具备完全仿射不变性,进而提出了一种基于ORB的快速完全仿射不变图像匹配新算法(AORB)。首先通过模拟相机在不同视点下成像以获取模拟的图像,然后用快速的ORB算法对所有模拟的图像对进行匹配,最终取得完全仿射不变性。实验结果表明,该算法能够满足完全仿射不变图像匹配需求,并且相比基于OpenMP的ASIFT计算速度提高了约6倍。
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 6times faster than ASIFT.
出处
《计算机工程与科学》
CSCD
北大核心
2014年第2期303-310,共8页
Computer Engineering & Science
基金
国家自然科学基金资助项目(61105031)
