一种用于立体匹配的边缘提取改进算法  

An improved edge extraction in stereo matching

作　　者：倪爱伟[1] 蒋文娟[1] 黎宁[1] 周建江[1] 

机构地区：[1]南京航空航天大学信息科学与技术学院,南京210016

出　　处：《信息通信》2009年第1期20-23,共4页Information & Communications

摘　　要：针对立体匹配中的边缘提取,本文提出一种简单而实用的改进方法。通过Canny算子检测最初的边缘,再利用几何信息选择关键点。根据关键点所确定的标记进行边缘连接,获得完整的边缘。该方法排除了孤立边缘、虚假边缘对边缘检测的影响,并通过引入直线分段法提取有用边缘,降低了算法的复杂度。实验结果表明,改进方法的边缘提取定位精确且连续性好,轮廓全面清晰,点、线特征突出,为立体匹配打下了良好的基础。In this paper, a simple and effective method for edge extraction in stereo matching is presented. In this method, coarse edge information is firstly detected by Canny edge detector, and key points are generated which utilizes the geometrical characteristic of counter. By using edge connection based on labels determined by key points, the complete edge is finally extracted. The approach can effectively wipe off a great deal of spurious and isolated edges and line split adopted reduces the complexity of computation. The experimental results have shown that the method can improve the edge consistency and localization. The point and line features of edge are stressed, which leads to a better edge extraction performance. The improved method plays a good foundation of matching.

关 键 词：边缘检测 边缘连接 直线分段 立体匹配 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]