基于计算机视觉的地形3D重建

构造3D地形模型有很多种方法．本文提出一种用数码相机获得的未标定照片获取三维地形模型的简单方法．这种方法仅需要从两幅或多幅照片中选取对应点，根据这些对应点，求出基本矩阵，摄像机矩阵，进而进行三维地形表面的估计，实验结果及算法分析表明，本文提出的特征匹配算法精确度较高，实现地形重建方法切实可行，生成的模型可视效果较好。

RECONSTRUCTION ON 3D TOPOGRAPHY BASED ON COMPUTER VISION

There are many methods to estimate 3D topography model. Here we present a simple methodology to extract the three-dimensional topographic surface from photographs taken with a hand-held camera with no constraints imposed on the camera positions or field survey. The technique requires only the selection of corresponding points in three or more photographs. From these corresponding points,we could calculate fundamental matrix and camera matrix, and estimate 3D surface topography. Experimental results demonstrate the high accuracy of the corner matching algorithm and vividness of the topography model. Algorithmic analysis shows that our approaches can be applied to topography reconstructon.