Layover Regions Identification In SAR Imaging Through A Non-Local Formulation Based On Differential Geometry

We propose a novel formulation for layover regions identification in SAR imaging, by employing an appropriate parametrization of the ground profile and utilizing differential geometry. It enables the rigorous identification of both the regions undergoing direct and indirect layover. Specifically, the adopted ray casting based approach results in an efficient implementation, since the sequential exploration always remains confined only to regions (which are adjacent to direct regions) actually affected by indirect layover, thus minimizing unnecessary computation. The implemented algorithm for SAR layover regions simulation results to be robust, efficient, and easy to be implemented. High-resolution Cosmo Skymed (CSK) C-band SAR data acquired over the mountainous area is used to illustrate the capabilities of the proposed approach.