3维激光扫描树干提取与建模研究

由于树木生长的不规则性,造成对其各部分组件的测定与建模具有复杂性与挑战性。本文利用3维激光扫描仪获得树木的点云数据,对树干进行分离提取与3维建模研究。通过对四棵树的树干点云进行分离与提取、3维建模并计算其体积,得出由于遮挡等问题,全部提取树干点云难以实现。在提取主要树干点云的基础上,采用最大距离封装树干表面效果较好,封装表面采用网格修补可建立树干3维立体模型,实现体积计算。

A Study of Extraction and Modeling of Three-Dimensional Laser Scanning of Tree Trunk

The irregularity of the growth of trees makes the measurement and modeling of tree components complex and challenging.In this paper,we acquire point cloud data of trees using three-dimensional laser scanner,then extract and builds the model of three-dimensional trunks.Based on the extraction,3-dimensional modeling and volume calculation of point cloud data of 4 tree trunks,we conclude that total extraction of tree trunk point cloud is hard to be done due to the problem of sheltering.Based on the extraction of tree trunk point cloud data,it is effective to capsulate tree trunk surface using maximum distance method.We could set up the 3-dimensional model of tree trunks by grid mending the surface of the tree trunk and calculate the volume thereof.