基于影像仿真的DEM匹配方法研究  

Research on DEM Matching Method Based on Image Simulation

作　　者：韩自祥 赵国忱[1] 辛鑫 贾萌娜 刘斌 彭嫚 HAN Zixiang;ZHAO Guochen;XIN Xin;JIA Mengna;LIU Bin;PENG Man(The Institute of Surveying and Geographical Sciences,Liaoning Technical University,Fuxin 123000,China;State Key Laboratory of Remote Sensing Science,Institute of Remote Sensing and Digital Earth,Chinese Academy of Sciences,Beijing 100101,China)

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000 [2]中国科学院遥感与数字地球研究所遥感科学国家重点实验室,北京100101

出　　处：《测绘与空间地理信息》2020年第5期33-37,共5页Geomatics & Spatial Information Technology

基　　金：国家自然科学基金(41771488,41671458,41771490)资助。

摘　　要：数字高程模型是进行形貌分析及各种科学应用的基础数据,其质量及定位精度直接影响着后续科学分析和应用的效果。但不同的DEM产品间往往存在几何上的差异,为了有效消除DEM间的偏差,使不同源的DEM能进行对比、融合等,本文提出一种基于影像仿真的DEM匹配方法:首先针对行星表面光照特征,以DEM为输入进行影像仿真,然后利用仿真影像进行二维匹配,获得的匹配点不仅能进行DEM间的不一致性分析,还能进行DEM的配准,为DEM后续协同使用提供基础。文章利用嫦娥二号DEM产品与SLDEM产品进行匹配实验,结果表明:本文提出的方法能获取DEM间大量正确的匹配点,利用这些点消除了DEM间的平面误差,并应用于DEM不一致性分析及后续的数据融合。Digital Elevation Model(DEM)is the basic data for topographic analysis and various scientific applications.Its quality and positioning accuracy directly affect the subsequent scientific analysis and application.However,The geometric differences generally exist among different DEM products.In order to effectively reduce the deviation between DEMs and enable different DEM sources to compare and fusion for certain applications,a DEM matching method based on image simulation is proposed in this paper.Firstly,according to the illumination characteristics of planetary surface,DEM is used as input for image simulation.Then matching is carried out using simulation images.The matched points can not only analyze the inconsistency between DEMs,but also perform DEM registration,which provides a basis for the subsequent collaborative use of DEM.The experiment using Chang’E-2 DEM products and SLDEM shows that the proposed method can obtain a large number of correct matching points between DEMs.These points are used to eliminate the horizontal error between DEMs and support the DEM inconsistency analysis and subsequent fusion application.

关 键 词：数字高程模型 匹配 影像仿真 不一致性分析 

分 类 号：P237[天文地球—摄影测量与遥感]