RADIOMETRIC PROCESSING OF AERIAL AND SATELLITE REMOTE-SENSING IMAGERY

This paper describes some radiometric problems in remote-sensing image ry. Analysis methods are presented to correct or account for atmospher ic, illumination, view-angle, and topographic effects prior to the app lication of image interpretation techniques such as reflectance mappin g or automated classification. A key feature of some of these image co rrections is the use of a digital elevation model (DEM) created from m ultispectral, stereoscopic System Probatoire d'Observation de la Terre (SPOT) High Resolution Visible (HRV) satellite imagery using an autom atic DEM generation program. The accuracy and use of this model has be en tested in automated terrain analysis of a moderate to high relief e nvironment in southwestern Yukon, Canada, and is described here in the formulations for illumination and topographic corrections.