摘要
随着工程数字化及BIM设计的不断发展,3D测量在项目中的应用已不可或缺。在三维激光扫描点云处理中,以规则表面(平面、圆柱面、球面)的法向量和主曲率为参数建立了规则几何表面自动提取的数学模型,并对利用该模型提取的表面同名点距离与精密全站仪测距结果进行了模型精度对比分析。通过点云数据去噪、降采样、规则几何表面自动提取,结合3D贴图、渲染等操作,以某大楼空间仿真为实例,得到了一种厘米级的点云数据规则表面提取和空间仿真的应用方法。
With the continuous development of engineering digitization and BIM design,the application of 3D measurement in project is indispensable.In 3D laser scanner point cloud processing,taking the normal vector and principal curvatures of a regular surface(plane,cylindrical surface and spherical surface)as the parameters,the mathematical model of regular geometric surface automatic extraction is established.The distance of surface namesake point and the ranging result of precision total station extracted by this model are compared and analyzed for model precision.The noise reduction,downsampling and regular geometric surface automatic extraction are carried out through point cloud data.Combined with the operation of 3d chartlet and rendering,taking the spatial simulation of a building as an example,an application method of centimeter-level point cloud data regular surface extraction spatial simulation is obtained.
出处
《城市道桥与防洪》
2020年第7期317-319,326,M0029,共5页
Urban Roads Bridges & Flood Control
关键词
三维激光扫描
预处理
规则表面
自动提取
空间仿真
3D laser scanner
pre-processing
regular surface
automatic extraction
spatial simulation
作者简介
赵佩铭(1988—),男,硕士,工程师,从事市政工程测量工作。
