结合Freeman分解与子孔径散射特性的极化SAR图像分类Classification of PolSAR image based on freeman decomposition and subaperture scattering behavior
吴婉澜,皮亦鸣
摘要(Abstract):
本文结合Freeman分解和子孔径分析,提出一种新的极化SAR图像分类算法。该方法首先利用子孔径分解,产生不同方位观察角度下的子孔径图像,再利用Freeman分解对各个子孔径图像提取三种散射机理成分的功率,平均后对类别进行细分,最后使用Wishart统计分类器对类别进行分类划分得到最终结果。该方法考虑了极化散射机理在不同方位观察角度下的变化,能够取得较好的分类效果,能够保存主要极化散射特性的纯度,同时还可以动态地设定分类类别数。最后利用EMISAR获取的极化SAR数据进行了仿真,验证了该方法的有效性。
关键词(KeyWords): 极化SAR;Wishart分类器;Freeman分解;子孔径
基金项目(Foundation): 国家自然科学基金(No.60772143)
作者(Author): 吴婉澜,皮亦鸣
DOI: 10.16251/j.cnki.1009-2307.2010.05.061
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