利用投影轨迹的卫星影像近似核线重排快速算法  

Approximate Epipolar Rearrangement Algorithm of Satellite Stereo-imagery by Projection Trajectory

作　　者：胡芬[1] 王密[1] 李德仁[1] 肖明虹 

机构地区：[1]武汉大学测绘遥感信息工程国家重点实验室,武汉市珞喻路129号430079 [2]广西第二测绘院,柳州市东环路10号545006

出　　处：《武汉大学学报（信息科学版）》2009年第12期1431-1435,共5页Geomatics and Information Science of Wuhan University

基　　金：国家863计划资助项目(2009AA12Z120;2007AA120203);国家科技支撑计划资助项目(2006BAB10B01);国家自然科学基金资助项目(40201044)

摘　　要：针对卫星影像核线的几何特性,采用线性模型简化表示每对同名核曲线,提出了一种实用的近似核线重排快速算法,并对多种地形条件的卫星立体影像进行实验。结果表明,在影像定向参数精度较高的情况下,该算法能够生成子像素级上下视差的核线影像,且具有简单、实用性强等特点。We propose an efficient algorithm for approximate epipolar rearrangement of satellite stereo-imagery by linear simplification of PT, according to geometric properties of epipolar curves in the scope of satellite image scene. In order to verify the correctness and feasibilities of the algorithm, experiments were performed on three kinds of satellite stereo-imageries with various terrains, respectively. Results show that on the rearranged approximate epipolar images, the vertical parallax of each pair of conjugate points all keep at a sub pixel level. Moreover, the algorithm is also featured by easy applicability and suitability to linear pushbroom satellite stereo-images. This algorithm has been successfully applied to the 3D data revision and automated DEM generation software modules of satellite linear pushbroom images.

关 键 词：卫星立体影像 投影轨迹 近似核线重排 上下视差 

分 类 号：P237.3[天文地球—摄影测量与遥感]