激光技术2016，Vol.40Issue(6)：814-819,6.DOI:10.7510/jgjs.issn.1001-3806.2016.06.009
改进型形状上下文的工件立体匹配方法
Stereo matching algorithm of workpiece images based on improved shape context
摘要
Abstract
In traditional shape context, the calculation complexity was high in traversing the contour sampling points to calculate the histogram similarity and it can not meet the industrial real-time requirements. In order to solve the problem, a fast stereo matching algorithm of workpiece images based on the improved shape context was proposed. In the disparity constraints of stereo image centroid, by using the histogram distribution of shape context, candidate matching points set were obtained and the calculation complexity was greatly reduced. To increase the discrimination between the matching points and non-matching points, the similarity measurement of shape context was weighted by the weighted coefficient. During the matching period, the improved shape context was combined with the histograms of oriented gradients of the corresponding contour feature points in 3 × 3 neighborhood to acquire the initial matching point set. At last, the false matching points were eliminated by random sample consensus algorithm. Theoretical analysis and experimental verification were applied to workpiece images, and the corresponding experimental comparison was presented. The experiment results show that this improved algorithm has higher precision, faster matching speed and high robustness.关键词
图像处理/立体匹配/形状上下文/视差约束/梯度方向直方图/随机抽样一致性算法Key words
image processing/stereo matching/shape context/disparity constraints/histograms of oriented gradients/random sample consensus algorithm分类
信息技术与安全科学引用本文复制引用
范莹,白瑞林,王秀平,李新..改进型形状上下文的工件立体匹配方法[J].激光技术,2016,40(6):814-819,6.基金项目
江苏省高校优势学科建设工程资助项目( PAPD) （ PAPD）
江苏省产学研前瞻性联合研究基金资助项目(BY2015019-38) （BY2015019-38）
