期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2008
卷号：XXXVII Part B1
页码：1139-1144
出版社：Copernicus Publications
摘要：This paper introduced a new automatic terrain extraction (ATE) module inside ERDAS's photogrammetric software LPS. This method uses a global DEM to initialize a surface model and iteratively refines it with image registration on different pyramid levels. Search range used in image registration is adaptively controlled by elevation range of matched feature points. However, mismatches and elevation blunders may cause search range to be out-of-scope and fail ATE process. We used three blunder elimination techniques to ensure the convergence of search range: positional cross-correlation, PCA-based blunder elimination, and object filtering. The method is tested with images from various sensors including frame cameras, satellites, and Leica's ADS40
关键词：Automatic Terrain Extraction; Digital Surface Model; Digital Terrain Model; Image Registration; Blunder Removal; ; Object Filtering; ERDAS; LPS
