Quick Bird卫星图像几何精校正初探

Discussion on Geometric Accurate Correction for Quick Bird Satellite Image

以云南省宜良县匡远镇集体林权制度改革中所使用的Quick Bird卫星图像作为试验数据,对该卫星图像的几何精校正方法进行了初步研究,分析了几何多项式模型、RPC模型、投影变换模型以及DEM对高分辨率的Quick Bird卫星图像几何校正的作用。通过把该镇的原始图像整体进行几何精校正(即整乡校正)和切割成小块分别校正(即分村校正)2种方式的对比试验表明,利用RPC模型与DEM相结合的整乡校正的方法最为适合于林权制度改革宗地勘测对Quick Bird卫星图像的要求。

A methodological investigation was carried out on the geometric correction of the high-resolution Quick Bird satellite images used in the reform of collective forest property right of Kuangyuan Township, Yiliang County, Yunnan Province. Functions of polynomial mode, RPC mode, Projective transform mode and DEM in the image were discussed. Geometric corrections were conducted on the original image of the whole townships and on the images of individual villages. The results indicated that the RPC mode integrated with DEM to geometrically correct the image of the whole township could meet the demand of the reform of collective forest property right.