| 基于图像模拟的HJ星CCD相机交叉定标 |
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| 引用本文： | 巩慧,田国良,余涛,顾行发.基于图像模拟的HJ星CCD相机交叉定标[J].北京航空航天大学学报,2013,0(6):818-822. |
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| 作者姓名： | 巩慧 田国良 余涛 顾行发 |
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| 作者单位： | 北京交通大学土木建筑工程学院,北京,100044;中国科学院遥感应用研究所,北京,100101 |
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| 基金项目： | 国防科技工业民用专项科研技术研究资助项目(07K00100KJ);国家863无场地定标关键技术资助项目(8—060011) |
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| 摘 要： | 针对同一HJ-1星的两台CCD相机,提出基于图像模拟的交叉辐射定标方法:通过建立两台CCD相机图像DC值的数学关系,以获取地面目标图像的已定标的CCD为标准对未同时获取图像的待定标的CCD进行交叉定标,得到了2008年10月A2CCD和B2CCD的定标系数.利用贡格尔场野外实验数据和敦煌场的MODIS数据对定标系数进行真实性检验,并对该方法的主要误差来源进行了分析.结果表明,交叉定标具有较高的精度和可信度,可以在保证定标精度的同时,提高定标的频次.
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| 关 键 词： | 交叉定标 图像模拟 CCD相机 真实性检验 |
| 收稿时间： | 2012-06-27 |
Cross calibration of CCD cameras in HJ satellite based on the image simulation |
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| Gong Hui School of Civil Engineering,Beijing Jiaotong University,Beijing,China Tian Guoliang Yu Tao Gu Xingfa.Cross calibration of CCD cameras in HJ satellite based on the image simulation[J].Journal of Beijing University of Aeronautics and Astronautics,2013,0(6):818-822. |
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| Authors: | Gong Hui School of Civil Engineering Beijing Jiaotong University Beijing China Tian Guoliang Yu Tao Gu Xingfa |
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| Institution: | 1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;2. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China |
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| Abstract: | As to two CCD cameras in the same HJ-1 satellite, a new cross calibration method was proposed based on image simulation. Through the method, un-calibrated CCD without obtaining the image of a target was cross-calibrated by calibrated CCD covering the target by analyzing the mathematical relation of digital counts between two CCD cameras. The calibration coefficients of A2CCD and B2CCD in October 2008 were achieved with the method and validated by using field experiment data of Gongger test site and MODIS data of Dunhuang test site. Principal error sources of the method were analyzed. The results show that the method has high precision and reliability. This method can increase the frequency of calibration besides ensuring the precision of the calibration. |
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