云南高原地区CBERS CCD影像几何精纠正方法比较研究

The study on the ways of geometric correction compare on CBERS CCD images of Yunnan plateau area

由于云南地处云贵高原,山高坡陡,地表崎岖不平且无法获取中巴地球资源1号卫星02星轨道星历参数和传感器姿态参数,不能利用严格的数学模型对其变形进行纠正,为此,本文通过选择三种近似几何模型:多项式模型、有理函数模型、直接线性变换模型,对其开展几何精纠正试验,以期得出适合云南高原地区CBERSCCD图像数据纠正的最优方法,解决我省中巴地球资源卫星CCD影像几何纠正的精度控制问题。

Because Yunnan is located Yunnan-Guizhoup lateau which is in the high mountains and stee Pslopes and the surface is rugged.So the greater undulating terrain,the greater the degree of image distortion and Unable to get the ephemeris parameters and the sensor profile parameters on 02 orbit of the 1st China-Brazil Earth Resources Satellite and can not the use of rigorous mathematical model for its distortion corrected.In this paper through the analysis the reasons of satellite images distortion they can choose three suitable areas of Yunnan Plateau CBERS CCD images to correct the approximate geometric model:polynomial model,rational function model,direct linear transformation model,its correct geometric tests carried out with a view to arrive at the Yunnan Plateau areas suitable for CBERS CCD image data to correct the optimal solution to our province CBERS CCD image geometric correction accuracy of the control problem.