|
|||||
|
|
Surface roughness and geological mapping at subhectometer scale from the High Resolution Stereo Camera onboard Mars Express |
|
| Authors: | Aurélien Cord David Baratoux Patrick Martin Ronald Greeley Philippe Masson Gerhard Neukum |
| Institution: | a European Space Agency (ESA), ESTEC, Keplerlaan 1, Postbus 299, 2200 AG Noordwijk, The Netherlands b Observatoire Midi-Pyrénées, UMR5562, 14 av. Edouard Belin, 31400 Toulouse, France c Department of Geological Sciences, Arizona State University, Box 871404, Tempe, AZ 85287-1404, USA d IDES, UMR8148, Bat. 504/509 Université Paris-Sud, Fac. des Sciences, 91405 Orsay Cedex, France e Free University of Berlin, Institute for Geosciences/Planetology, Malteserstr. 74-100, D-12249 Berlin, Germany |
| Abstract: | The quantitative measurement of surface roughness of planetary surfaces at all scales provides insights into geological processes. A characterization of roughness variations at the scale of a few tens of meters is proposed that complements the analysis of local topographic data of the martian surface at kilometer scale, as achieved from the Mars Orbiter Laser Altimeter (MOLA) data, and at the subcentimeter scale using photometric properties derived from multi-angular observations. Relying on a Gabor filtering process, an algorithm developed in the context of image classification for the purpose of texture analysis has been adapted to handle data from the High Resolution Stereo Camera (HRSC). The derivation of roughness within a wavelength range of tens of meters, combined with analyses at even longer wavelengths, gives an original view of the martian surface. The potential of this approach is evaluated for different examples for which the geological processes are identified and the geological units are mapped and characterized in terms of roughness. |
| Keywords: | Geological processes Impact processes Image processing Mars surface |
| 本文献已被 ScienceDirect 等数据库收录！ | |