月球卫星三线阵CCD影像模拟  

SIMULATION OF THREE-LINE CCD SATELLITE IMAGES OF THE MOON

作　　者：李巧枝[1] 张吴明[1] 阎广建[1] 穆西晗[1] 

机构地区：[1]北京师范大学地理学与遥感科学学院遥感科学国家重点实验室环境遥感与数字城市北京市重点实验室,北京100875

出　　处：《北京师范大学学报（自然科学版）》2007年第3期298-302,共5页Journal of Beijing Normal University(Natural Science)

基　　金：国家"八六三"计划资助项目(2003AA134040);国家天文台探月计划资助项目

摘　　要：讨论了由月球DEM和正射影像模拟月球卫星三线阵CCD立体影像的原理和方法,其中重点讨论了月球卫星三线阵传感器投影中心外方位元素模拟、模拟影像像元到月球DEM的投影点求解、考虑月球表面BRDF效应的影像灰度纠正三部分.本文在通常的基于共线方程的投影模拟方法的基础上考虑了月球表面的BRDF效应,对模拟影像进行了灰度纠正.模拟影像像元到DEM的投影点求解采用正算迭代方法,投影过程在月固坐标系下进行,进行长航带影像模拟时可减小月球曲率带来的投影误差.The principle and method of simulating the satellite-borne three-line CCD stereo images of the moon surface are presented using lunar DEM and relevant orthoimages. Several key problems are discussed, which include the simulation of exterior orientation of the sensor, the solution of the crossing point of each projecting line and the lunar DEM, the correction of image grey values considering BRDF of lunar surface. In addition to the general collinear function based projection method, the BRDF of lunar surface is considered to correct the gray value of the images in 3 views.. On the other hand, in order to find the crossing point of projecting line and the lunar DEM, an iterative method is applied. The simulation is carried in the lunar-fixed coordinate system, which can reduce the large projecting error when long strip image is simulated.

关 键 词：月球 影像模拟 BRDF效应 三线阵CCD 

分 类 号：P23[天文地球—摄影测量与遥感]