基于线特征的SPOT影像几何纠正方法

Rectification Methods Based on Line Features for SPOT Imagery

摘要:

探讨了利用线特征实现SPOT影像的精确几何纠正问题.在研究SPOT卫星影像星历参数的应用基础上，提出了利用卫星星历参数确定纠正模型的初始参数，将直线方程作为纠正模型的约束条件，通过迭代计算获取纠正模型的精确参数，实现SPOT卫星影像的精确纠正.结果表明，提出的线特征SPOT影像几何纠正方法，可以满足1∶5万数字正射影像的精度要求.

Abstract:

This paper discusses the problem of the accurate geometric correction based on line features for SPOT imagery.On the basis of researching the use of SPOT images’ ephemeris parameters,satellite ephemeris parameters are proposed to be adopted to determine initial parameters of correction model.Then,accurate parameters are obtained by means of iterative calculations,while the linear equations are used as the set of constraint conditions for the correction model,and precise correction of SPOT imagery is achieved by using the accurate parameters of the correction model.The experimental results show that the geometric correction method of SPOT imagery based on line features can meet the accuracy of digital orthophoto in 1∶50000.