| 组合图像模拟和精配准的星载SAR图像正射校正 |
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| 引用本文： | 尤红建.组合图像模拟和精配准的星载SAR图像正射校正[J].测绘科学,2009,34(6). |
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| 作者姓名： | 尤红建 |
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| 作者单位： | 中国科学院电子学研究所,北京,100080 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 本文给出了一种采用DEM模拟出的影像和星载合成孔径雷达(SAR)精配准策略的正射校正方法。首先根据DEM数据采用距离-多普勒模型和经验公式模拟出SAR图像,然后分别采用Harris算子和互信息匹配的方法提取模拟图像和实际SAR图像上的同名特征点,并根据这些特征点构建的不规则三角网(TIN)实现模拟SAR图像和实际SAR图像的精确配准。最后将星载SAR图像通过实际图像和模拟图像的精确配准关系以及模拟图像和DEM数据之间的对应关系校正到DEM所在的地理坐标中,实现SAR图像的正射校正。
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| 关 键 词： | DEM 模拟SAR TIN 正射校正 |
Ortho-rectifying space-borne SAR based on fine registration and image simulation |
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| YOU Hong-jian.Ortho-rectifying space-borne SAR based on fine registration and image simulation[J].Science of Surveying and Mapping,2009,34(6). |
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| Authors: | YOU Hong-jian |
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| Abstract: | A new method to ortho-rectify space-borne SAR was proposed in this paper. DEM data is used to simulate SAR image based on Range-Doppler model and experimental formula and then Harris operator and mutual information matching are applied to extract homonymous feature points from real SAR image and simulated SAR image. Triangle irregular network (TIN) is constructed using those feature points and then real SAR image can be matched the simulated SAR image accurately based on TIN. The real SAR image is then ortho-rectified according to the relationshi Pbetween real SAR and simulated SAR, as well as the relationshi Pbetween simulated SAR and DEM. The method was verified by RadarSat image. |
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| Keywords: | DEM TIN DEM simulated SAR TIN ortho-rectifying |
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