A New Approach for DEM Generation Based on Polarimetric SAR Interferometry

In this paper, the polarimetric information is used to register the interferometric images and enhance the interferometric phase. The similarity parameter is employed to register the images. This approach is more robust than the traditional method. The combination of the best phase among three polarimetric channels can be used to improve the phase quality and reduce the residues. Then a new phase filter based on the weighted median filter is proposed. This filter is used to reduce the residues sufficiently and make phase unwrapping easily. Finally, a multi-path method is introduced to unwrap the phase