SPOT图像的几何纠正

采用了 3种几何纠正 SPOT图像的方法 :多项式纠正法、数字微分纠正法、直接线性变换法。在精度上 ,数字微分纠正法最高 ,直接线性变换法次之 ,多项式纠正法最低。在数字微分纠正中 ,采用了直接法和间接法两种方案 ,两者在纠正精度上基本一致 ,但后者纠正精度稍优于前者。最后又利用直接线性变换模型简单而严密地纠正了 SPOT图像。

Geometric Rectification of SPOT Imagery

In this paper three methods to realize the geometric rectification of SPOT imagery are used, that is, polynomial rectification method, digital differential rectification method and direct linear transformation method. The results show that the digital differential rectification method is the method with the highest accuracy, the direct linear transformation method comes second, and the polynomial rectification method with the lowest among the three methods. This paper also presents the direct and the indirect digital differential rectification methods. The geometry accuracy of two kind of rectifications is close, but the latter is a little bettre than the former. In the end, The results show that Direct linear transformation method is simple and rigorous method for the geometric processing of SPOT images.