PRINCIPAL CURVATURES PROCESSING ON DIGITAL ELEVATION MODELS: A CASE STUDY ON MARTIAL PALEOLAKES BY PHOTOCLINOMETRY
Seminars
Semester 2
A detailed and accurate topographic modelling of terrestrial planets is essential to scientific research and exploration missions, for example, understanding their geomorphological processes, evaluating landing and exploration sites, etc. Stereo photogrammetry and laser altimetry are two of the most used methodologies for generating Digital Elevation Models (DEM). However, DEMs generated by stereo photogrammetry are prone to spikes and stair-like artifacts, thus inaccurate;
and those by laser altimetry yield large sample gaps, thus lack of detail.
I propose the use of a reflectance-based method — shape from shading —
to infer a very-high resolution DEM, down to 0.5 m/pixel. Such inferred products are useful for modelling Martian paleolakes bathymetry. In this seminar, I focus on 3D geometry processing of principal curvatures for optimization and feature enhancement.
For additional information, please contact Mr. TSANG Ho Ming, billyhmt@connect.hku.hk.