王皎;

• 1:山东省国土测绘院

摘要(Abstract)：

针对合成孔径雷达(SAR)同侧多角度图像入射角存在较大差异,图像存在几何畸变,导致多幅图像间连接点选取困难这些问题,该文发展一种几何约束的SSNCC匹配方法。首先,依据SAR不同角度图像的核线近似直线特性,利用外部数字高程模型(DEM)和距离多普勒模型约束匹配搜索范围;然后,将主图像待匹配点的匹配窗口4个角点坐标投影到辅图像上,基于仿射变换模型快速实现辅图像匹配窗口的几何改正;最后,利用SSNCC相似测度计算待匹配点的相关性,相关性最大的点为多角度SAR图像间同名点。该文采用高分三号3幅不同入射角的降轨SAR图像进行试验,结果表明该文方法能有效地提高匹配点数量,匹配成功率从67%提高到84.5%。

关键词(KeyWords)： SAR;多角度;图像匹配;几何约束;NCC

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 王皎;

DOI: 10.16251/j.cnki.1009-2307.2020.08.014

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