基于多纹理的合成孔径雷达图像相干斑抑制

Speckle Reduction for the Synthetic Aperture Radar Based on Multiple Textures

相干斑抑制是合成孔径雷达 (syntheticapertureradar,SAR)图像后处理的首要问题。在多纹理假设下 ,采用最大似然方法来同时估计多个极化通道纹理参数。该方法保存了极化信息 ,消除了极化通道间的耦合 ,取得了较好的相干斑抑制效果 ;并与极化白化滤波 (polarimetricwhiteningfilter,PWF)

The reduction of speckle in SAR image is the prime problem in SAR image processing. We propose a new approach to polarimetric SAR speckle reduction. We estimate simultaneously the texture parameters of multi polarimetric channels by the method of maximum likelihood under the assumption of multiple textures. This approach preserves the polarimetric properties, reduces the coupling between polarimetric channels. We also compare it with the PWF and Lee′s optimal weighting algorithms.