IKONOS卫星图像的快速三维场景重建

IKONOS卫星立体像对一般经过图像匹配，采用RPC模型，通过繁杂的多项式迭代获取DEM，实现三维重建，其计算花费很大。在对城市三维重建时，认为城市局部的地面是平坦的，有近似相同的海拔，城市的三维信息集中就是建筑物的三维信息，针对IKONOS影像的特点，利用几何光学成像模型快速计算同名点的相对大地坐标，实现城市场景的快速三维重建。实验结果表明，场景重建结果有较好的精度，满足观测和处理的需求，实现了快速处理和分析环境数据。

Quick 3D Reconstruction of the IKONOS - Satellite Stereo Images

The traditional 3D reconstruction of IKONOS stereo images includes image matching and extracting DEM by iterative RPC model.The process is complex and costs a great deal of time.When reconstruct smooth city stereo images,the altitude of the floor is nearly the same.And the most 3D information of city is the buildings.The positioning algorithm which bases on Geometrical optics is adopted to get the 3D information of city.The experiment result turns out that this method is quick,and the accuracy achieved can fulfil the requirement of the process latter.