结合等值线滤波条纹边缘保持能力强和Goldstein滤波平滑效果好的特点,并且引入伪相干值对Goldstein滤波因子进行改进,提出InSAR干涉图的等值线中值–Goldstein二级滤波方法。模拟数据和真实数据的实验结果证明,强噪声干涉图经过新方法滤波后噪声水平大大降低而且分布均匀,条纹细节信息保持良好,在原本看不到信号的区域也可以恢复部分条纹,并适用于条纹密集和曲率变化大的干涉图。 Goldstein filter factor is improved by introducing pseudo-coherence values, and the isostrophic median-Goldstein second-order filter method of InSAR interferogram is proposed based on the strong edge preserving ability of contour lines and good smoothing effect of Goldstein filter. Experimental results of the simulated data and the real data show that the noise of the strong noise interference map is greatly reduced and evenly distributed after the new method is filtered, the detail of the stripe information is maintained well, partial stripes can also be restored in areas where the original signal can not be seen, Intensive stripe and curvature of the interference map.