摘要
传统的正射影像在进行数字纠正时通常是将地物纠正在DTM上,致使城区造成屋顶和树木的坐标投影差。若利用LiDAR生成的密集DSM则可以制作真正射影像。阐述LiDAR技术的工作原理和系统组成以及真正射影像的制作原理,详细介绍从LiDAR数据中获取DSM,再结合同步采集的数码影像进行正射纠正生成真正射影像的可行性方法。
Traditional ortho images is corrected by terrain model （DTM）, as a result of which objects like housetops and trees are projected incoorrectly. If using surface model （DSM） which extracted from Lidar data, objects and ground are well corrected, then we can process true-ortho images. This paper summarizes the principle and makeup of Lidar, then explains elaborately a method of extracting DSM from Lidar data and applies it to process ture-ortho images.
出处
《测绘工程》
CSCD
2009年第3期47-50,共4页
Engineering of Surveying and Mapping
