隧道点云格网化方法分析研究

Research on the Gridding Methods of Tunnel Point Cloud

面对海量点云数据,如何根据点云特征和应用目的选择合适的格网化方法十分重要。分析了主要的格网化方法,并根据地铁隧道实测点云数据进行实验分析。结果表明,不同点云格网化方法存在很大差异,克里格法整体效果较好,最小曲率法存在伪趋势现象,加权反距离插值边缘表现失真,三角剖分法存在断层现象,应用时要根据需要选择合适的格网化方法。

In the face of mass point clouds data, how to select appropriate grid handling methods is very important, according to the characteristics of point clouds and application purpose. We analyzed the main grid handling methods, and used the subway tunnel point clouds data to do experiment analysis in this paper. The results show that there is different in different grid handling methods, Kriging method own better effect in overall, the minimum curvature method exists the phenomenon of trend pseudo, and the weighted inverse distance interpolation edge has distortion performance. According to the need of application, we can choose appropriate grid handling method.