Abstract
We introduce a novel ultra-high-resolution Digital Terrain Model (DTM) processing system using a combination of photogrammetric 3D reconstruction, image co-registration, image super-resolution restoration, shape-from-shading DTM refinement, and 3D co-alignment methods. Technical details of the method are described, and results are demonstrated using a 4 m/pixel Trace Gas Orbiter Colour and Stereo Surface Imaging System (CaSSIS) panchromatic image and an overlapping 6 m/pixel Mars Reconnaissance Orbiter Context Camera (CTX) stereo pair to produce a 1 m/pixel CaSSIS Super-Resolution Restoration (SRR) DTM for different areas over Oxia Planum on Mars—the future ESA ExoMars 2022 Rosalind Franklin rover’s landing site. Quantitative assessments are made using profile measurements and the counting of resolvable craters, in comparison with the publicly available 1 m/pixel High-Resolution Imaging Experiment (HiRISE) DTM. These assessments demonstrate that the final resultant 1 m/pixel CaSSIS DTM from the proposed processing system has achieved comparable and sometimes more detailed 3D reconstruction compared to the overlapping HiRISE DTM.
Highlights
Over the last 50 years, mankind’s knowledge of Mars has greatly increased as a direct result of the various orbital and robotic missions
We propose for Colour and Stereo Surface Imaging System (CaSSIS) imagery a novel ultra-high-resolution Digital Terrain Model (DTM) processing chain using super-resolution restoration (SRR) coupled with the latest 3D modelling system employing a combination of photogrammetry and photoclinometry methods, i.e., Shape-from-Shading (SfS), from a slightly lower resolution imaging dataset such as CTX or High-Resolution Stereo Camera (HRSC), to retrieve compatible or even more detailed 3D information than stereo-derived 1 m/pixel HiRISE DTM
We provided intercomparison of the resultant CaSSIS DTM with existing Planetary Data System (PDS) HiRISE
Summary
Over the last 50 years, mankind’s knowledge of Mars has greatly increased as a direct result of the various orbital and robotic missions. Since the early 1970s, digital imaging sensors aboard these missions have been pivotal, because they show what the surfaces look like and can provide three-dimensional (3D) information. Through stereo and/or photoclinometry techniques, detailed surface feature studies can be undertaken with 3D and terrain corrected imagery from multiple orbiting spacecraft. Space Agency (ESA) Mars Express High-Resolution Stereo Camera (HRSC) [1] or the ESA. U.S sensors, including the Mars Reconnaissance Orbiter’s Context Camera (CTX) [3] and the High-Resolution Imaging Experiment (HiRISE) [4], tend to acquire 3D information only. Among the international community of planetary scientists, stereo-derived HiRISE Digital Terrain Models (DTMs), at metre-scale resolution [5], have been the most favoured source of 3D information for studying fine-scale features of the Martian surface
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
