| 基于岭参数的谱修正迭代法及其在有理多项式参数求解中的应用 |
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| 引用本文： | 刘斌,龚健雅,江万寿,祝小勇.基于岭参数的谱修正迭代法及其在有理多项式参数求解中的应用[J].武汉大学学报(信息科学版),2012,37(4):399-402. |
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| 作者姓名： | 刘斌 龚健雅 江万寿 祝小勇 |
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| 作者单位： | 1. 武汉大学测绘遥感信息工程国家重点实验室,武汉市珞喻路129号,430079
2. 国家测绘地理信息局卫星测绘应用中心,北京市海淀区莲花池西路28号,100830 |
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| 基金项目： | 国家自然科学基金创新研究群体资助项目，国家863计划资助项目 |
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| 摘 要： | 通过比较基于L-曲线法求取岭参数的岭估计法与谱修正迭代法,分析了两种方法的特性,为选择合适的方法进行病态方程求解作参考。针对谱修正迭代法收敛慢、效率低这一缺点,提出了一种利用狭义岭估计中的岭参数(或广义岭估计的岭参数对角矩阵)进行谱修正,改进谱修正迭代法的方法。利用模拟算例对改进的方法进行实验,在不同噪声情况下,改进方法效率有不同程度的提高。把改进方法应用到SPOT影像RPC求解中,发现改进的方法在应用中具有一定的优势。
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| 关 键 词： | RPC参数 谱修正迭代法 岭估计 L-曲线法 |
Improvement of the Iteration by Correcting Characteristic Value Based on Ridge Estimation and Its Application in RPC Calculating |
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| LIU Bin,GONG Jianya,JIANG Wanshou,ZHU Xiaoyong.Improvement of the Iteration by Correcting Characteristic Value Based on Ridge Estimation and Its Application in RPC Calculating[J].Geomatics and Information Science of Wuhan University,2012,37(4):399-402. |
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| Authors: | LIU Bin GONG Jianya JIANG Wanshou ZHU Xiaoyong |
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| Affiliation: | 1 State Key Laboratory Information Engineering in Surveying,Mapping and Remote Sensing, Wuhan University,129 Luoyu Road,Wuhan 430079,China)(2 Satellite Mapping Application Center,National Administration of Surveying,Mapping and Geoinformation, 28 West Lianhuachi Road,Haidian District,Beijing 100830,China) |
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| Abstract: | As an effective method for solving the morbidity normal equation,Ridge estimation has been widely studied and applied in processing of the measurement data,but the method changes the equivalent relationship and the result is a biased estimate.The iteration by correcting characteristic value does not change the equivalent relationship,but there are few studies on the limitations and the application scope of the method.With comparing the Ridge estimation method and the Iteration by correcting characteristic value,and analysing the characteristics of two methods to guide the application,an improved iteration by correcting characteristic value using the ridge parameters was proposed in this paper.This method not only reduces the iterative times and advances efficiency,but also has the same precision with the originality method. |
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| Keywords: | rational polynomial coefficients(RPC) iteration by correcting characteristic val-ue ridge estimation~ L-curve method |
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