面向街景立面三维重建的近景影像直线匹配方法研究  

Study on Street Elevation 3D Reconstruction-Oriented Straight Line Matching for Close-Range Images

作　　者：李畅[1] 刘亚文[2] 胡敏[3,4] 周勇[1] 

机构地区：[1]华中师范大学城市与环境科学学院,武汉市珞喻路152号430079 [2]武汉大学遥感信息工程学院,武汉市珞喻路129号430079 [3]通信指挥学院基础部,武汉市解放公园路45号430010 [4]中国地质大学(武汉)经济管理学院,武汉市鲁磨路388号430074

出　　处：《武汉大学学报（信息科学版）》2010年第12期1461-1465,共5页Geomatics and Information Science of Wuhan University

基　　金：国家教育部科学技术重点资助项目(108098);国家自然科学基金资助项目(40671078;40771088)

摘　　要：提出了一种新的基于直线自动分组、核线约束、灭点方向引导和影像金字塔模型的直线匹配算法。该算法利用核线约束缩小搜索范围但不完全依赖于核线,利用灭点方向引导匹配但不完全依赖于灭点,并且符合空间物体整体分布不连续但局部连续的客观规律,再加上大范围的搜索,不仅克服了一般直线匹配算法中核线约束退化或基于单应性映射失效的缺陷,而且能匹配出直线段端点。同时,还提出了基于随机抽样一致性的单片剔除误匹配直线的算法。实验验证了此算法的实时性、准确性和实用性。Street elevation 3D reconstruction needs taking automation into account,therefore we present a novel straight line stereo matching algorithm based on straight line auto-grouping,epipolar line constraint guiding,vanishing point direction guiding and image pyramid model.The algorithm based on independent observation ＋ local integral constraint ＋large area search,and uses epipolar line to reduce searched area but does not absolutely depend on epipolar line,which utilizes vanishing points＇ directions to guide line matching but does not absolutely depend on vanishing points＇ directions.Furthermore,the algorithm satisfies the objective law that the global distribution of space-object is discontinuous but local is continuous,moreover bases on large area search for line matching so that not only does the algorithm overcome the deficiencies of normal line stereo matching algorithms based on epipolar line constraint or homography map,but also accurately locates the matched endpoints of line segments at the same time and accomplishes straight line matching with high efficiency.Furthermore,removing error matched lines based on RANSAC（RANdom SAmple Consensus） for single image is presented.Finally,experimental results prove that the algorithm has real-time performance,rightness and practicality.

关 键 词：街道立面 核线 灭点 影像金字塔 直线匹配 

分 类 号：P234.1[天文地球—摄影测量与遥感]