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：2002
卷号：XXXIV Part 3 B
页码：142-145
出版社：Copernicus Publications
摘要：This paper reports on the development of an algorithm that can renovate the RPC(Rational Polynomial Coefficients) models using GCPs (Ground Control Points) and Pseudo_GCPs (Pseudo_Ground Control Points) in order to improve the positional accuracy of the 3D ground coordinates extracted from IKONOS-2 satellite images. When 3D ground coordinates are extracted from IKONOS-2 satellite images, their positional accuracy depends on the RPC models. Therefore, in the case where RPC models are renovated by GCPs, the positional accuracy of the extracted ground coordinates can be improved. However, in actual cases, the GCPs are neither distributed evenly on the area of the satellite images nor can be obtained sufficiently. To solve these problems, Pseudo_GCPs, which were calculated from the original RPC models, were used. The RPC models were then renovated using both the GCPs and the Pseudo_GCPs together, and the 3D ground coordinates were extracted using the renovated RPC models. Finally, the validity of the algorithm was demonstrated on the basis of an accuracy evaluation using the check points obtained from the GPS(Global Positioning System) survey and triangulation. In addition, it was demonstrated that the vertical accuracy of the ground coordinates could be improved by using this algorithm
