AUTOMATED GENERATION OF COLOURED ORTHOIMAGES AND IMAGE MOSAICS USING HRSC AND WAOSS IMAGE DATA OF THE MARS96 MISSION

摘要

The Russian Mars96 Mission is going to be launched in autumn 1996. It will carry the German cameras HRSC (High Resolution Stereo Camera) and WAOSS (Wide Angle Optoelectronic Stereo Scanner). This combined experiment will provide multiple along-track stereo imagery of the whole planet Mars. Orthoimages and coloured image mosaics will be generated in completely automated processes. Orthoimage generation uses geometric calibration information of the CCD line scanners HRSC and WAOSS, orbit and pointing information for each line of the entire strip of image data (improved by photogrammetric bundle adjustment) and Digital Terrain Models (DTMs) derived by multi-image matching and special interpolation techniques. While the geometrical aspect of mosaicking will be taken care of within the bundle block adjustment radiometrical mosaicking has been improved in that way, that all definitions which had to be made in advance, e.g. definition of overlapping regions and division lines, are now performed automatically and not interactively on the screen of an image processing system. High quality coloured mosaics can be generated afterwards using IHS colour transformation in order to preserve high resolution as well as colour information. Especially true colour Topographic Image Maps in scales 1:500,000 up to 1:50,000, containing contour lines derived from a DTM, are the desired products of this cartography-oriented mission to planet Mars.