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电子学报  2015 

一种适合方位建筑物的基于物理散射模型的极化SAR影像四分量分解方法

DOI: 10.3969/j.issn.0372-2112.2015.01.032, PP. 203-208

Keywords: 极化SAR,四分量分解,方位建筑物,体散射模型,相位旋转,方位角补偿

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Abstract:

针对走向与雷达飞行方向不平行的建筑物(简称为方位建筑物),提出了一种基于物理散射模型的极化SAR影像四分量分解方法.该方法用于区分散射类型易混淆的方位建筑物和植被.本文首先对方位角补偿后的相干矩阵进行相位旋转;然后构造一种修正的体散射模型,该模型包含纯体散射模型和方位二面角散射模型;最后加入两个能量限制条件,有效避免了负能量像素点的出现.实验结果表明,与已有的四分量分解方法相比,提出的分解方法有效解决了方位建筑物被误识别为植被等体散射类型的问题且消除了负能量,有利于从植被中区分方位建筑物.

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