光学立体测绘卫星影像高效密集匹配方法研究  

Study on Efficient Dense Matching Method of Stereo Mapping Satellite Image

作　　者：杨文环 张帅[2] 孙超 张奥 YANG Wenhuan;ZHANG Shuai;SUN Chao;ZHANG Ao(China SIWEI Surveying and Mapping Technology Co.,Ltd.,Beijing 100086,China;China Centre for Resources Satellite Data and Application,Beijing 100094,China;China Aerospace Science and Technology Corporation,Beijing 100048,China)

机构地区：[1]中国四维测绘技术有限公司,北京100086 [2]中国资源卫星应用中心,北京100094 [3]中国航天科技集团有限公司,北京100048

出　　处：《航天返回与遥感》2024年第4期99-108,共10页Spacecraft Recovery & Remote Sensing

基　　金：国家重点研发计划资助项目(2023YFB3906103);中国航天科技集团有限公司钱学森青年创新基金项目(2021-53);中国航天科技集团有限公司自主研发项目(2023-39)。

摘　　要：针对半全局匹配(Semi-Global Matching,SGM)中代价聚合存在大量计算冗余的问题,文章提出了基于最小代价路径的快速代价聚合与视差确定方法。在代价聚合阶段,将SGM更新代价空间转变为最小代价路径确定,获取候选视差值集合,使得代价聚合计算量不再与视差范围相关,显著提升处理效率;在视差确定阶段,采用单个视差候选值与其它视差候选值差值的绝对值之和的倒数作为该视差候选值的支持度,统计所有视差候选值的支持度,从而可应用“赢者通吃”策略快速确定最终视差值。采用“资源三号”和“高分七号”卫星立体像对密集匹配对比实验验证该方法的有效性,结果表明该方法可在与SGM匹配结果保持一致的同时,将代价聚合处理效率提升90%。Aiming at the problem of computational redundancy in cost aggregation in semi-global matching(SGM),a fast cost aggregation and disparity determination method based on the minimum cost path is proposed,which includes two stages:1)Different from SGM,the cost aggregation is conducted by finding the path of minimum cost instead of updating the matching cost.Then the cost aggregation result is transformed from the aggregation cost to a set of disparity candidate values.The amount of cost aggregation calculations is no longer related to the disparity range.2)After all the paths are aggregated and the disparity candidate value set is obtained,the reciprocal of the sum of the absolute difference between a single disparity candidate value and other disparity candidate values is used as its support.Counting the support of all disparity candidate values,the“winner takes all”strategy is employed to determine the final disparity value after the support of all disparity candidate values are counted.The experimental results of the dense matching of ZY-3 and GF-7 images verify the effectiveness of the method,which can increase cost aggregation processing efficiency by 90% while keeping the matching results consistent with SGM.

关 键 词：立体测绘卫星 密集匹配 半全局匹配 最小代价路径 

分 类 号：P2[天文地球—测绘科学与技术] V1[航空宇航科学与技术—人机与环境工程]