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大数据时代的来临以及数字城市概念的提出在一定程度上推动了地面激光雷达技术的发展,激光点云数据处理技术应运而生。激光点云曲面重构技术在三维可视化建模中起到举足轻重的作用。为验证曲面重构效果,本文使用Riegl-VZ1000地面三维激光扫描仪获取中国矿业大学南湖校区北门雕塑点云数据。经过点云数据预处理阶段后对其进行NURBS建模,并使用Geomagic Studio偏差分析模块逐站对比点云数据和重构曲面模型。实验结果表明,NURBS模型视觉效果良好、重构精度较高,平均偏差达到10-2mm数量级,基本与扫描原始点云一致,满足高精度建模的目的。
The advent of big data era and the concept of digital city have promoted the development of ground lidar technology to a certain extent. Laser point cloud data processing technology came into being. Laser point cloud surface reconstruction techniques play a decisive role in 3D visualization modeling. In order to verify the effect of surface reconstruction, this paper uses the Riegl-VZ1000 terrestrial 3D laser scanner to obtain the data of the north gate sculpture cloud at South China Campus of China University of Mining and Technology. NURBS modeling was performed after the point cloud data preprocessing stage and Geomagic Studio deviation analysis module was used to compare point cloud data and reconstruct the surface model. The experimental results show that the NURBS model has a good visual effect and a high reconstruction accuracy, with an average deviation of 10-2mm, which is basically consistent with the original point cloud of the scan and meets the requirements of high-precision modeling.