基于残差点的干涉相位图自适应滤波

Residues-based Adaptive Approach for Phase Image Noise Reduction

为了能有效地对InSAR干涉相位图进行滤波,利用残差点矩阵作为滤波控制因子,对两种干涉相位图滤波方法进行了改进。该措施在不破坏致密的干涉条纹的情况下,通过引用干涉相位图的残差矩阵,对不同区域的图像采用不同强度的滤波器来实现自适应的降噪,同时详细描述了滤波方法的实施步骤,并用ERS-1重复轨道数据进行了验证,结果表明,该改进方法可取得良好的滤波效果。

In this paper, residues matrix is used as the factor of filtering for processing effectively phase image. Two kinds of filters for phase image are modified utilizing residues matrix. Modified filters have different filter intensities for different areas of phase image according to noise condition. Therefore they can realize an adaptive filtering effect and can preserve fine details in the interferogram. We describe the implementation of filters in detail. By using interferograms data generated by ERS-1 repeat-pass, their effectiveness is tested.