关键词: 城市建筑物, 三维重构, 线面基元, 点云, 自动化

Abstract: Building is an important component of urban landscape，therefore，how to rapidly realize 3D visualization of city buildings has a great significance for constructing cyber city.Aiming at some problems in traditional 3D modeling，such as intensive manual labor，low degree of automatization and high cost etc，this paper presents a high feasible and high automatic approach to auto-reconstruct 3D framework outline based on line and plane information.The approach gets image data by common digital camera，which reduces the cost of the practical application.Moreover，distinguishing and clear 3D edges also can be achieved by the method that is better than classic 3D reconstruction based on point cloud.Finally experimental results prove the effectiveness and feasibility of the algorithm.

Key words: city building, 3D reconstruction, line and plane, point cloud, automatization