Generation of a digital elevation model based on synthetic aperture radar airborne stereoscopic images: application to AIRSAR images (Hawaii)
Radargrammetry is a method that generates topographic maps from homologous points of stereoscopic radar images and a stereomodel taking into account the flightpath parameters and the geometry of radar beams. Here, we propose an algorithm that calculates the elevation of homologous points included in Synthetic Aperture Radar images obtained by parallel same-side facing airborne flightpaths. Furthermore, we develop an automatic search of homologous points by a method of shape recognition determined by a threshold on the pixel radiometry gradient. With this algorithm, we generate a topographic map of the Kilauea volcano (Hawaii) from AIRSAR images.