A stereo matching algorithm based on SIFT feature and homography matrix  

作　　者：李宗艳 宋丽梅 习江涛 郭庆华 朱新军 陈明磊 

机构地区：[1]Key Laboratory of Advanced Electrical Engineering and Energy Technology,Tianjin Polytechnic University [2]School of Electrical,Computer and Telecommunications Engineering,University of Wollongong

出　　处：《Optoelectronics Letters》2015年第5期390-394,共5页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.60808020 and 61078041);the National Science and Technology Support(No.2014BAH03F01);the Tianjin Research Program of Application Foundation and Advanced Technology(No.10JCYBJC07200);the Technology Program of Tianjin Municipal Education Commission(No.20130324)

摘　　要：Aiming at the low speed of traditional scale-invariant feature transform(SIFT) matching algorithm, an improved matching algorithm is proposed in this paper. Firstly, feature points are detected and the speed of feature points matching is improved by adding epipolar constraint; then according to the matching feature points, the homography matrix is obtained by the least square method; finally, according to the homography matrix, the points in the left image can be mapped into the right image, and if the distance between the mapping point and the matching point in the right image is smaller than the threshold value, the pair of matching points is retained, otherwise discarded. Experimental results show that with the improved matching algorithm, the matching time is reduced by 73.3% and the matching points are entirely correct. In addition, the improved method is robust to rotation and translation.

关 键 词：matching stereo invariant rotation constraint camera neighborhood otherwise entirely histogram 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TN912.3[自动化与计算机技术—计算机科学与技术]