刘文祥,张继贤,黄国满,赵争,卢丽君,魏钜杰

• 1:中国矿业大学环境与测绘学院
• 2:中国测绘科学研究院

摘要(Abstract)：

由于SAR斜距成像几何方式及地形起伏的影响,原始SAR影像存在透视收缩、叠掩、阴影等严重的几何畸变和辐射畸变。其中,叠掩区具有强烈的后向散射回波,在极化SAR影像的分类研究中容易造成林地与居民地等地物混分,降低分类的精度。针对该问题,本文研究一种地形辐射校正方法,引入投影角计算后向散射系数γ0,有效地解决了地形起伏造成的辐射畸变问题。选取一景全极化Radarsat-2影像进行实验验证,分别对地形辐射校正前后的极化SAR影像进行了复Wishart监督分类。通过对分类结果的比较,表明经本文地形辐射校正方法处理后,极化SAR影像的分类精度得到了改善。

关键词(KeyWords)： 极化SAR;地形辐射校正;投影角;复Wishart监督分类

Abstract:

Keywords:

基金项目(Foundation): 国家863计划主题项目(2011AA120401)

作者(Author): 刘文祥,张继贤,黄国满,赵争,卢丽君,魏钜杰

DOI: 10.16251/j.cnki.1009-2307.2014.03.021

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