干涉相位图的降噪滤波，是干涉合成孔径雷达成像中必须的步骤之一。文中根据干涉条纹在切线方向变化最小的特点，利用沿切线方向的曲线窗口对干涉相位图进行旋滤波降噪，并通过对比不同的滤波结果及相应相位解缠结果，证明了旋滤波在保持条纹结构信息，消除噪声和提高相位解缠精度应用中的可行性和有效性。

Noise filtering for interferometric phase image, is one of key problems in InSAR imaging. On the basis of the characteristic that the interferometric fringes have minimum gradient in the tangent direction, this paper employs the spin fihering with curved windows along the fringe tangent direction for interferometric phase images, and its feasibility and efficiency in keeping the fringe information, suppression the noise and improving the unwrapping precision are proved through comparing the different illtering methods and the corresponding phase unwrapping results.

TN957.51