基于三维TIN的非地面点云剔除方法研究

The exclusion method for removing noise in ground point clouds based on the 3D TIN

三维激光扫描仪对地面进行扫描时,会产生很多非地面点,即噪声点,对后续研究带来很多不便。针对这一问题,提出两种基于三维TIN的非地面点云剔除方法,分别是根据判断相邻三角形法向量的夹角以及构建局部平面的方法,介绍两种剔除方法的原理及实现过程,以拟合局部平面的方法进行实例分析,得出剔除结果。

When we are scanning the ground with three-dimensional laser scanner,it will generate a lot of non-ground points that is noise data,which will bring a lot of inconvenience on the follow-up study.In response to this problem,we have proposed two methods to remove the points with much error.They are respectively based on the judgment of the angle of two normal vectors between two adjacent triangles,as well as ways to build local plane.It has introduced the principle of the two methods and the implementation process.We have already done a case study by the method of building local plane and got a satisfactory result.