Méric, Stéphane; Fayard, Franck; Pottier, Éric (SAPHIR team, Institute of Electronics and Telecommunications of Rennes (IETR), European University of Brittany, France)
The more intuitive way to extract depth information from remote sensing images is stereogrammetry. The technique of radargrammetry is applied on SAR stereo data and provides digital elevation models. This proposal abstract is to present our studies about extraction of 3D information from radar images. We examine a way to produce digital elevation models (DEM) from a montainous area (french alpins) and the way to improve the accuracy of the DEM. The main idea is to match image stereo pairs, to create a disparity map from one image to the other and to compute elevation thanks to the incidences angles. At this time, we improve the results of the correlation operations by taking into account the output results of several correlation windows.