The detection and information compensation of SAR layover based on R-D model

The traditional method of detecting radar layover is firstly calculating the local radar angle of the image pixel points, then comparing the local radar angle of adjacent pixels to determine the size of Radar layover region. But this method is of low efficiency towards a complete radar images. This article is being launched to detect Radar layover areas through the region growing algorithm and compensate gray information of the detected area with SAR image simulation on the basis of the semi-empirical backscattering model and R-D (range-Doppler) model, with the radar noise finally added in radar layover area. The final tests verify it is effective to solve the problem of missing information in the layover area of radar orthophotos.