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：785-790
出版社：Copernicus Publications
摘要：We discuss an improved approach for digital surface model (DSM) generation from high-resolution satellite imagery (HRSI) in this paper. The HRSI systems, such as IKONOS and QuickBird have initialed a new era of Earth observation and digital mapping. The half-meter or better resolution imagery from Worldview-1 and the planned GeoEye-1 allows for accurate and reliable extraction and characterization of even more details of the earth surface. In this paper, the DSM is generated from HRSI using an advanced image matching approach which involves an integration of feature point, grid point and edge matching algorithms, makes use of the explicit knowledge of the image geometry, and works in a coarse-to-fine hierarchical strategy. The DSMs are generated by combination of matching results of feature points, grid points and edges. This approach produces reliable, precise, and very dense 3D points for high quality digital surface models which also preserve discontinuities. Following the DSM generation, the accuracy of the DSM has been assessed and reported. To serve both as a reference surface and a basis for comparison, a lidar DSM has been employed in a testfield with differing terrain types and slope. The experimental results have shown that the developed approach achieved very good quality results of DSM with general height accuracy is around 4m over topographically diverse areas
关键词：DSM; IKONOS; Satellite; High Resolution; Image
