Adaptive filtering method combined with quality map for InSAS interferogram

The quality of interferogram, which is limited by various phase noise, will greatly influence the subsequent processes interferometric synthetic aperture sonar (InSAS), such as unwrapping and digital elevation model (DEM) estimation. Therefore, filtering an essential step in signal processing for InSAS. In this paper, adaptive method combined with map proposed to suppress noise while preserving fringe edges. main advantage new approach size window can be adaptively selected according map. A function between established, controls strength filtering. area high quality, large remove otherwise, low area, small keep edge details. effectiveness validated via some illustrative simulated experiment real InSAS data.