InSAR处理中滤波方法研究

Research on Filtering Methods of InSAR Processing

合成孔径雷达干涉图质量直接影响相位解缠精度,对干涉图进行滤波处理,去除相位图噪声,改善干涉图质量,是InSAR处理中十分重要的步骤,通过探讨方位向与距离向滤波,以及多视滤波、圆周期均值/中值滤波、基于梯度自适应滤波、Goldstein自适应滤波等噪声抑制方法,并利用Envisat ASAR数据对以上滤波方法进行对比验证。

The quality of interferogram will directly affect phase unwrapping, so interferogram filtering, which eliminate noise and improve quality of interferogram,is an important step of InSAR. In this paper, we studied several filter methods Used in InSAR,including azimuth and range direction filter, multi-look filter,medium filter,gradient-based adaptive filter and Goldstein adaptive filter.