一种多视极化SAR广义K-分布的研究

A Study on Generalized K-distribution for Multi-look Polarimetric SAR Inages

本文提出一种极化合成孔径雷达（ＳＡＲ）广义Ｋ－分布模型用于描述经多视处理的、高分辨率的全极化ＳＡＲ成像数据的统计特性，其特点是各极化通道的纹理为部分相关的ｇａｍｍａ分布。利用纹理与相干斑乘性模型，首先导出了部分相关纹理的联合概率密度函数和多视广义极化ＳＡＲ Ｋ－分布概率密度函数；然后给出了基于联合矩的分布参数估计方法；最后利用真实ＳＡＲ数据进行了模型的试验．

In this paper, a generalized K-distribution model for multi-look fully ploarimetric SAR images is presented firstly. Then, the parameter estimation method for the mood is described. Finally, the real data experi- mental results using SIR-C L-band SAR data provided shows that the generalized K-model can be used to better characterize nature and urban scatter in high resolution multi-look polarimetric SAR imagery.