InSAR基于相干图的自适应中值滤波方法

InSAR Adaptive Median Filter Based on Coherence Map

对干涉条纹图的滤波是InSAR数据处理中的一个重要环节,基于干涉图中点的相干系数越大,其置信度越高的特点以及中值滤波具有较强的边缘保持能力的特点,本文将相干图引入中值滤波,提出了一种基于相干图的自适应中值滤波方法,既能实现对影像不同程度的滤波,又能很好地保持相位边缘信息。

Filter,direct to interferometry,is the significant link of InSAR data processing. Based on the character that the greater the coherence of a point,the higher the degree of confidence,and the character that median filter has strong edge retention ability,this paper introduce the coherence map to median filter,and put forward to a kind of method named adaptive median filter based on coherence map,which not only achieve different levels of filtering the image,but also maintain phase-edge information well.