机载SAR图像与仿真SAR图像的匹配策略

Matching Strategy of Airborne SAR Image and Simulated SAR Image

机载SAR图像与仿真SAR图像的匹配在机载SAR图像无控制正射纠正中具有重要的应用价值。为了提高机载SAR图像与仿真SAR图像匹配的可靠性,本文在SAR图像仿真的基础上,分别以机载SAR图像和仿真SAR图像作为匹配基准,设计了综合运用特征点提取、金字塔影像匹配、相关系数相似性测度计算、双向匹配等方法的匹配方案。利用机载SAR图像和由SRTM DEM仿真的SAR图像进行了匹配试验,统计了不同策略的正确匹配点数,并结合仿真SAR图像的特点,分析认为:以仿真SAR图像作为匹配基准进行匹配的策略较好。

Matching of airborne SAR image and simulated SAR image plays an important role in airborne SAR im- age ortho-rectification without ground control points. In order to improve the matching reliability of airborne SAR image and simulated SAR image, matching strategies were studied based on SAR image simulation. Airborne SAR image and simulated SAR image were used as matching base separately, matching method was designed which comprehensive used character points deriving, pyramid images matching, correlation coefficient similarity measure calculation and two-direction matching strategy. Airborne SAR images and SAR images simulated from SRTM DEM were used in matching experiments, moreover, statistical analysis of correct matching points for those matching strategies were done. Combined with the characteristics of simulated SAR image, the conclusion was educed that matching results were better with simulated SAR image as matching base.