基于PCI的SPOT5遥感影像正射校正方法分析

正射校正是各种遥感应用过程中必不可少的基础工作，对于某些地形起伏较大、常规的几何校正难以消除由此引起的几何变形的影像，有必要进行正射校正。正射校正的方法很多，以攸县黄丰桥林场柏市分场为研究区，以SPOT5高分辨率遥感影像为校正数据进行正射校正，采用Satellite Orbital Mod—elling模型和Rational Functions模型，针对不同方法所产生的正射影像图精度以及运算速度进行比较与分析。实验结果表明：在相同的控制点条件下，对于SPOT5数据来说，Satellite Orbital Modelling模型的精度更高，但是此模型计算速度相对稍慢一点。该研究对SPOT遥感影像能更正确地选择正射校正方法提供参考。

Analysis on Ortho-rectification Methods of SOPT5 Satellite Image Based on PCI

Ortho-rectification is the essential basic work to the process of remote sensing applications, for some undulating terrain, conventional geometric correction is so difficult to eliminate the geometric distortion in the image, so ortho-rectification is necessary for the image. Ortho-rectification has many methods, it took Baishi sub- frame of Huangfengqiao forest farm in Youxian county as the research area, high-resolution remote sensing image of SPOT5 as the ortho-rectification data by using satellite orbital modelling model and rational functions model, we can compare and analyze the image precision and operating speed according to different methods. The experimental results showed that, the precision of satellite orbital modelling model is higher than rational functions model, but the satellite orbital modelling calculation speed slightly slow down a bit, which provided the reference for the correction method of SPOT5 remote sensing image according to the requirements of processing.