| 基于先验求权的虚拟观测值法及其在线阵影像定向中的应用 |
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| 引用本文： | 余俊鹏.基于先验求权的虚拟观测值法及其在线阵影像定向中的应用[J].测绘科学,2009,34(3). |
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| 作者姓名： | 余俊鹏 |
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| 作者单位： | 武汉大学遥感信息工程学院,武汉,430079 |
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| 基金项目： | 国家重点基础研究发展规划(973计划) |
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| 摘 要： | 航天线阵列遥感影像定向参数之间存在强相关性,参数解算不稳定,难以得到准确结果。较为常见的解决方法是将定向参数处理成虚拟观测值或用岭估计代替最小二乘估计。本文首先分析了这两种方法的联系与区别,提出利用原始外方位元素精度等先验知识给定虚拟观测值权,进一步提高定向结果的可靠性。对SPOT-5与QuickBird两种高分辨率线阵影像的定向试验结果表明,在使用6个分布良好的地面控制点情况下,影像对地目标定位精度可达到2~4个像素的水平。
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| 关 键 词： | 线阵列传感器 虚拟观测值 影像定向 |
The virtual observation method with weight prior-determined and its application in orientation of the linear array imagery |
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| YU Jun-peng.The virtual observation method with weight prior-determined and its application in orientation of the linear array imagery[J].Science of Surveying and Mapping,2009,34(3). |
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| Authors: | YU Jun-peng |
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| Abstract: | Due to the strong correlation among orientation parameters of remote-sensing imagery taken from spaceborne linear-array sensors,the orientation results obtained by least-squares estimation become seriously unsteady and incorrect.To solve this problem,orientation parameters are usually treated as virtual observations.Another method is to replace LS estimation with ridge estimation.In this paper,we first discuss the linkage and distinction between both improved methods.Then a new algorithm to determine the we... |
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| Keywords: | linear array sensor virtual observation image orientation |
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