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Automatic Feature Registration and DEM Generation for Martian Surface Mapping
Fengliang Xu, Kaichang Di, Ron Li, Larry H. Matthies, and Clark F. Olson In Proceedings of the ISPRS Commission II Symposium, August 2002. In this paper, we introduce the results of automatic registration, bundle adjustment, and DEM generation from panoramic close-range images taken on the 1997 Mars Pathfinder mission. Image registration is based on Forstner interest points, cross-correlation coefficient-based matching, parallax verification, and graph consistency verification. A free-network approach is used for bundle adjustment. The final product is a seamless DEM of the landing site created by a five-step process: automatic registration of intra-stereo images, coarse DEM generation, automatic registration of inter-stereo images, bundle adjustment of the entire panorama, and seamless DEM generation. |
