卫星斜视影像地形遮蔽区的自动检测研究  

Research on Automatic Detection of Terrain Occlusion Areas in Satellite Oblique Images

作　　者：刘宗淇 袁占良[1] 王冬红[3] 陈兴峰 刘军 张蕾[3] 崔博伦 赵利民 LIU Zongqi;YUAN Zhanliang;WANG Donghong;CHEN Xingfeng;LIU Jun;ZHANG Lei;CUI Bolun;ZHAO Limin(School of Surveying and Land Information Engineering,Henan Polytechnic University,Jiaozuo 454001,China;Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China;Beijing Institute of Tracking and Telecommunications Technology,Beijing 100094,China;Beijing Institute of Space Mechanics&Electricity,Beijing 100094,China)

机构地区：[1]河南理工大学测绘与国土信息工程学院,焦作454001 [2]中国科学院空天信息创新研究院,北京100094 [3]北京跟踪与通信技术研究所,北京100094 [4]北京空间机电研究所,北京100094

出　　处：《航天返回与遥感》2024年第5期112-122,共11页Spacecraft Recovery & Remote Sensing

基　　金：民用航天项目(D040103)。

摘　　要：针对卫星斜视影像普遍存在的地形遮挡问题,文章提出了基于有理多项式系数(Rational Polynomial Coefficients,RPC)模型的高分辨率卫星影像遮挡检测方法。利用不规则三角网(Triangulated Irregular Network,TIN)表达三维地形表面,并采用光线追踪法精确探测入射光线与三角网的相交情况以确定交点间的遮挡关系。为提高遮挡检测效率,设计了一种极小化地形搜索区的方法,并利用斜视成像的真实卫星影像及模拟卫星影像进行了实验验证,结果表明该方法对遮挡区域的检测精度高于97%,能有效地识别出受地形遮挡影响的区域,自动生成准确的地形遮蔽区域掩膜影像。In addressing the prevalent issue of terrain occlusion in satellite oblique images,this paper proposes a high-resolution occlusion detection method based on the Rational Polynomial Coefficients(RPC)model.The proposed approach utilizes an irregular triangular mesh to represent the three-dimensional terrain surface and employs ray tracing techniques to accurately detect the intersections of incident rays with this mesh.This process facilitates the determination of occlusion relationships among the intersection points.To enhance the efficiency of occlusion detection,a strategy is developed that minimizes the search area within the terrain.Experimental validation is performed using both real oblique satellite images and simulated satellite images.The results demonstrate that the proposed method achieves an occlusion detection accuracy exceeding 97%,the area affected by terrain occluded area can be identified effectively and the mask image of terrain occluded area can be generated automatically.

关 键 词：遥感影像分析 斜视影像 遮挡检测 有理多项式系数模型 光线追踪 不规则三角网 

分 类 号：P237[天文地球—摄影测量与遥感] V19[天文地球—测绘科学与技术]