Integration of Orbital and Ground Images for Enhanced Topographic Mapping in Mars Landed Missions
نویسندگان
چکیده
To date, orbital and ground image data have been mostly separately processed for topographic mapping in Mars landed missions. We are in the process of developing a method for the integration of orbital and ground image networks to enhance precision mapping. In this research, HiRISE stereo images were used as orbital data while ground data include MER-B Pancam stereo images and their pointing information. The process of estimating unknown exterior orientation parameters for the HiRISE images is explained. For orbital image processing, a semi-automatic hierarchical stereo matching technique based on image pyramid is introduced. A bundle adjustment of HiRISE stereo pair is performed. Incremental bundle adjustment technology is employed to process MER ground images, to construct a ground image network and to improve rover localization accuracy. Also, digital terrain models (DTMs) and orthophotos of Victoria Crater have been generated from the HiRISE stereo pair and are compared with those derived from the networked ground imagery.
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