利用激光扫描和数码相机进行古建筑三维重建研究

本文提出了一种利用激光扫描仪和数码相机对古建筑物进行快速三维重建的方案。对于待扫描的建筑物,获取从不同角度扫描的激光点云,并用手持数码相机拍摄具有一定重叠度的序列图像。首先,对相邻扫描站的激光点云自动拼接,生成统一的点云模型。通过在点云和图像上分别提取特征直线,利用共面条件,解算各张照片相对于激光扫描坐标系的方位元素。利用已配准的两种传感器数据,提取建筑物框架,并映射纹理,生成三维模型。文章最后给出对武汉大学老图书馆三维重建的实验结果。

3D reconstruction of old architecture by laser scanner and digital camera

This paper provides a scheme to construct old architecture using laser scanner and digital camera.In our approach,laser point clouds are scanned from different scan positions and a sequence of overlapping images are taken by digital camera.The point clouds coming from neighbor scan station are automatic registered to combine a uniform model.Line feature are extracted from both image and depth intensity map which build from point cloud,and the pictures external orientation parameters are determined by the coplanar condition.The framework of the building and the texture are created from the aligned data sets.At last,an experiment provides the result of construction of old library of Wuhan University.