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：2006
卷号：XXXVI Part 4
出版社：Copernicus Publications
摘要：Mars Express is in orbit for over two years and has returned more than 1.000 image strips to earth taken by the multiple line scanner camera HRSC (High Resolution Stereo Camera). The three-dimensional position of the spacecraft is continually determined by the Flight Dynamics Team (FDT) at ESOC (European Space Operations Centre) in Darmstadt, Germany. The HRSC experiment with its multiple stereo lines is designed with the goal in mind to improve these nominal values of exterior orientation by means of photogrammetric techniques. First, tie points are determined automatically via image matching. After that a bundle adjustment is carried out to improve the exterior orientation. Unfortunately image quality is frequently degraded by noise from the incoming signal and camera electronics and by compression artefacts. In case of a low signal-to-noise ratio it is difficult or even impossible to derive correct and an adequate amount of tie points with image matching techniques. This paper deals with image restoration using anisotropic diffusion to improve tie point extraction. The results of the matching, the distribution of the tie points in the images and the achieved accuracy are presented and evaluated on the basis of some selected Mars Express orbits
