一种基于点云数据快速生成建筑物断面图的方法

A Method for Generating Building Sectional Drawing Using 3D Laser Point Cloud Data

提出了一种基于点云数据快速生成建筑物断面图的方法,首先利用设计的裁剪面对建筑物断面进行截取,得到该断面的边缘点云数据,形成断面边缘点云的二维平面数据;通过改进的Hough变换算法提取出共线点云,并对共线点云进行去噪、分割;采用选权迭代法拟合提取出的线状点云数据,找出各条线段端点,进而对端点进行连线绘制断面图。编程实现了基于点云数据快速生成建筑物断面图的算法,通过工程实例验证了该方法的可靠性和实用性。

This paper proposes a method to generate building sectional drawing based on 3 D laser point cloud data.Given the input point cloud,three steps are performed to obtain the building sectional drawing.Firstly,a cutting surface with certain range and thickness is designed to intercept the section of a building,then we get the 2 D projected point cloud of the section.Secondly,collinear points are extracted through an extended Hough transform algorithm,and noise points from the collinear points are removed.The collinear points are then segmented into separated line segments.Finally,we adopt selecting weight iteration method to obtain the endpoint coordinates of each line segment and generate sectional drawing by connecting the endpoints.The reliability and practicability of the process are verified by an engineering example.