基于三维点云制作虎丘塔平立剖面图方法研究

Research on a method for making the Tiger Hill pagoda flat vertical section drawing based on 3D point clouds

三维激光扫描技术可以快速、精确、多方位地获取建筑物表面的三维数据,在古建筑物保护和数字化中得到了广泛的应用。平立剖面图能够准确直观地表达出建筑物的真实形态,因此对建筑物的保护有着重要作用。本文以虎丘塔为研究对象,提出了一种基于三维点云的平立剖面图制作方法,首先对虎丘塔点云数据进行预处理,然后将点云数据进行切片,并把切片点云投影到栅格平面上,接着将落入栅格内部的点云重心化以得到特征点,据此构建点云特征轮廓线,最后得到平立剖面图。结果表明,该方法可以快速、准确地制作虎丘塔的平立剖面图。

Three-dimensional laser scanning technology can obtain the 3D data of the building surface quickly and accurately, it has been widely used in the conservation and digitization of ancient buildings. The flat vertical section drawing can accurately and directly describe the real shape of a building, therefore it plays an important role in the protection of buildings. In this paper, a method of generate the flat vertical section drawing based on 3D point clouds is proposed, which is based on the research of the Tiger Hill pagoda. Firstly, need to preprocess the Tiger Hill pagoda point cloud data. Secondly, take slicing point clouds and projected onto the grid plane, then fall into a grid point clouds inside the center of gravity in order to obtain the feature points, then point cloud feature contour is constructed. Finally the flat vertical section drawing is achieved. The results show that this method can get the fiat vertical section drawing of the Tiger Hill pagoda quickly and accurately.