Abstract:

A method of optimal weighting filtering based on twostage blocking is proposed to solve the problem of speckle appearing in polarimetric synthetic aperture radar (PolSAR) images. On the basis of part weighting filtering, the method uses edge detecting template in each sub-image block to perform heterogeneous areas classification, so that more accurate filtering parameter estimation is achieved by calculating them with the classified area element values. Experimental results demonstrate that the proposed method not only keeps the advantages of blocking, but also achieves better performance both on speckle suppression and edge preserving compared with the optimal weighting and the part weighting methods.