对于极化SAR图像,可以利用其同极化和交叉极化图像的相关性来进行降斑处理。本文介绍的极化SAR相干斑抑制方法将参数空间划分为正交的两个子空间——信号子空间和噪声子空间,通过保留信号子空间,相干斑被抑制,极化信息被保留。实验结果表明此方法可以有效的抑制相干斑,并且保留了极化信息。 For polarimetric SAR images, the speckle reduction can be performed by using the correlation between the co-polarized and cross-polarized images. The polarimetric SAR speckle reduction method described in this paper divides the parameter space into two orthogonal subspaces, the signal subspace and the noise subspace. By keeping the signal subspace, the speckle is suppressed and the polarization information is preserved. Experimental results show that this method can effectively suppress the speckle and preserve the polarization information.