| 基于SAR影像平地与水域ROI的由粗到精匹配方法 |
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| 引用本文： | 高磊,陆和平,杨健,李华滨.基于SAR影像平地与水域ROI的由粗到精匹配方法[J].航天控制,2009,27(1). |
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| 作者姓名： | 高磊 陆和平 杨健 李华滨 |
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| 作者单位： | 1. 北京航天自动控制研究所,北京,100854
2. 清华大学,北京,100084 |
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| 摘 要： | INS/SAR组合导航系统主要是基于图像相似性相关原理,即将SAR实时获取的图像与预存在匹配处理机中的基准图进行配准比较,得到载体相对于目标或预定区域的位置偏差,从而修正INS的累积误差,保证载体的导航精度.但由于基准图与实时图获取的条件不同,两者存在较大差异,会损害匹配概率和匹配精度,进而影响载体的定位精度.基于此提出了基于SAR影像平地与水域特征区域(ROI:Region of Interest)的由粗到精的匹配方法:即利用实时图全部小波第二层低频信息在基准图小波第二层特征影像上进行全局搜索,荻取实时图中心点的粗匹配坐标,根据粗匹配坐标找到对应的基准图上的区域及所包含的平地与水域ROI,再找到ROI在实时图上对应的大致区域,利用互相关算法对ROI进行匹配,得到最终匹配坐标.并对该方法进行了仿真计算,结果表明该方法在星载SAR/机载SAR匹配中取得很好的效果,满足高匹配精度的同时,增强了不同源SAR匹配的适应性.
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| 关 键 词： | 组合导航 小波变换 星载SAR 机载SAR |
A New Cursory-to-exacted Matching Algorithm Based on Region of Interest for Flat and Water Area |
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| GAO Lei,LU Heping,YANG Jian,LI Huabin.A New Cursory-to-exacted Matching Algorithm Based on Region of Interest for Flat and Water Area[J].Aerospace Control,2009,27(1). |
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| Authors: | GAO Lei LU Heping YANG Jian LI Huabin |
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| Institution: | GAO Lei1 LU Heping1 YANG Jian2 LI Huabin11.Beijing Aerospace Automatic Control Institute,Beijing 100854,China2.Tsinghua University,Beijing 100084,China |
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| Abstract: | The work principle of the SAR/INS compound navigation system is based upon the correlation of image similarity,that is,getting the carrier position error faced to the target region or region through the image registration,then correctting the accumulative error of the INS and ensuring the navigation precision.Because of the biggish differentia between the real-time image and the base image that caused by the different imaging condition,the match probability and match precision decline,finally worsen the car... |
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| Keywords: | Compound navigation system Wavelet transform Spaceborne SAR Airborne SAR |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
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