Analysis of data combining daytime visible reflected, daytime IR emitted, and nighttime IR emitted images allows us to isolate the physical effects of topography, albedo, and thermal inertia. To a good approximation, these physical influences interact linearly so that maps showing topographic shading, albedo, and relative thermal inertia can be produced by simple algebraic manipulation of the co-registered images. The shading map resembles an airbrush, shaded relief portrayal of the surface, and can be used as the input for quantitative reconstruction of topography by photoclinometry (shape-fromshading). We demonstrate the method with imagery from the NASA 2001 Mars Odyssey Thermal Emission Imaging System (THEMIS), a dataset that could support mapping most of Mars in this way at 100 m resolution.
|Title||Joint analysis of visible and infrared images|
|Authors||Randolph L. Kirk, Laurence A. Soderblom, Glen E. Cushing, Timothy A. Tituus|
|Publication Subtype||Journal Article|
|Series Title||Photogrammetric Engineering and Remote Sensing|
|Record Source||USGS Publications Warehouse|
|USGS Organization||Astrogeology Science Center|