基于UAV遥感影像的建筑物三维重建

3D Reconstruction of Buildings with Single UAV Image

提出一种基于UAV遥感影像的建模方法 ,其思路为 :通过对飞行器摄影姿态控制获取大倾角、高分辨率的城市景观影像 ,从二维GIS数据库中提取地面位置信息 ,在GIS信息辅助下利用建筑物单像立体量测算法获取建筑物的高度 ,并从中提取纹理信息 ,最终建立其精确的三维空间模型。

Today with the development of Digital Earth, Digital City and other digital projects, we have to be up against the puzzle that how to acquire 3D information of city efficiently and quickly. Many researchers all over the world bring forward different methods towards their own applications, but there is still lack of an uniform approach which can meet most demands from various users. In this paper, we put forward a 3D reconstruction method of city buildings with single UAV(Unmanned Aerial Vehicle) image. As a new platform of remote sensing, UAV has many good qualities such as low cost, simple in manipulation, high resolution, flexibility and etc. In a single UAV image, at first we get the inner elements (x 0, y 0) and f by checking up the camera. Secondly, we divide the parallel lines into three groups which parallel X, Y and Z coordinate axis respectively and compute the three joint points based on related photogrammetry theory. Thirdly calculate the three angle elements A, α and κ. Fourthly compute the scale between reality and image using the coordinate information in 2D GIS databases. Then we can measure the real height of buildings and reconstruct their 3D models. In the paper, we have also built some accurate models to test the feasibility and practicability of this method.