潘励, 何潇. 环境减灾卫星CCD影像精纠正方法研究[J]. 武汉大学学报 ( 信息科学版), 2013, 38(6): 631-636.
引用本文: 潘励, 何潇. 环境减灾卫星CCD影像精纠正方法研究[J]. 武汉大学学报 ( 信息科学版), 2013, 38(6): 631-636.
PAN Li, HE Xiao. Rectification Method of Linear CCD Image from HJ-1A/1B Satellites[J]. Geomatics and Information Science of Wuhan University, 2013, 38(6): 631-636.
Citation: PAN Li, HE Xiao. Rectification Method of Linear CCD Image from HJ-1A/1B Satellites[J]. Geomatics and Information Science of Wuhan University, 2013, 38(6): 631-636.

环境减灾卫星CCD影像精纠正方法研究

Rectification Method of Linear CCD Image from HJ-1A/1B Satellites

  • 摘要: 针对环境减灾卫星配备的CCD传感器宽幅侧视观测特点,构建了一种在线阵传感器共线方程基础上的扩展几何模型。用多项式和分段Hermite插值拟合卫星外定向参数,用高次多项式拟合成像畸变,应用谱修正解法克服系统病态造成的不收敛问题。针对该模型对图像控制点分布的特殊要求,提出一种基于二分图匹配算法的控制点自动搜索策略。实验表明,本文模型对于环境减灾卫星CCD影像的几何纠正精度以及对求解所需条件数的要求,都优于现有的通用模型方法。

     

    Abstract: According to the character of the CCD sensors which set up on HJ-1A/1B satellites,a new imaging model which is extended from the collinear equation for linear sensor is built.In this model,quadratic polynomial and Hermite interpolation polynomial are employed for fitting the variation of the exterior orientation elements,and high-order polynomial is used as distortion model,plus engaging iteration method to solve the frequent problem,ill-conditioned system.Furthermore,we also present a method based on bipartite graph matching for correspondence points matching to meet the requirement of the distribution of control-points.The empirical results show that the proposed model compared with existing models such as quadratic polynomial and rational function model is able to achieve a higher accuracy,and requires for smaller condition number,that is sufficient for keeping pace with the demand of the research for global land cover.

     

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