一种新的基于子线段的立体匹配算法  

A New Stereo Matching Algorithm Based on Sub-Line Segment

作　　者：李海滨[1] 张强[1] 

机构地区：[1]燕山大学电气工程学院,秦皇岛066004

出　　处：《光学学报》2007年第5期907-912,共6页Acta Optica Sinica

基　　金：国家重大技术装备创新项目(02-ZZ-11);河北省自然科学基金(F2006000268)资助课题

摘　　要：立体匹配是计算机视觉领域中最活跃的研究主题之一。为了精确并更快速的进行同名点匹配,提出了一种基于小波变换的子线段匹配方法。该方法利用样条二进小波变换系数在不同尺度下的模极大点,能提供在不同尺度下信号急速变化点的位置信息,采用由粗到细的匹配策略匹配这些特征点,并由这些特征点两两相邻的点构建子线段。采用加速方法,快速匹配子线段两端点之间的点。这种方法较好地解决了匹配精度和匹配速度之间的平衡问题。采用该方法对篦冷机内水泥熟料高度进行测量,实验表明,该方法能较精确地得出水泥熟料料层的分布状况。Stereo matching is currently one of the most active research topics in domain of computer vision. A subline segment match method based on the wavelet transformation is presented, in order to match feature points more accurately and efficiently. It is based on that the multi-scale local maxima of wavelet transform can obtain the locations of the signal sharp variation points at different scales for transformation coefficients of a quadratic spline wavelet. A from-coarse-to-fine matching algorithm is applied to match these feature points. Sub-line segment is structured by these feature points. The points between the two endpoints of the sub-line segment are matched quickly using acceleration way. This method proposes a good solution for balance problem between match precision and match speed, The thickness of cement clinker in the cooler is measured using this method. The experiment shows this method can obtain the bed of material distributed condition of the cement clinker precisely.

关 键 词：双目立体视觉 子线段匹配 二进小波变换 顺序约束 

分 类 号：TP75[自动化与计算机技术—检测技术与自动化装置]