In this paper

residues matrix is used as the factor of filtering for processing effectively phase image. Two kinds of filters for phase image are modified utilizing residues matrix. Modified filters have different filter intensities for different areas of phase image according to noise condition. Therefore they can realize an adaptive filtering effect and can preserve fine details in the interferogram. We describe the implementation of filters in detail. By using interferograms data generated by ERS-1 repeat-pass

their effectiveness is tested.