摘要
针对无法精确计算不规则物体体积的问题,提出利用点云三维坐标数据,采用法向量有向体积法计算复杂物体体积。其方法就是将不同高程面上三维坐标数据投影到XOY平面上,采用Delaunay法对离散点云进行三角形剖分,再还原到各三角形顶点的真实高程生成单面倾斜五面体,逐个计算出单一五面体的体积,最后求和得出整个物体的总体积。
In this paper,the volume of complex object is calculated based on directed volume method of normal vector with the datum of three-dimensional coordinates point cloud.The method is to project different three-dimensional elevation data onto the surface of the coordinate plane,using the Delaunay method to triangular partition of discrete points cloud,and then restore to the true elevation points to generate one-sided slant pentahedron,and calculate the volume of a single five face one by one.The total volume of the entire object is obtained by sum.Simulated calculation is made by using 1°and 0.05°for the reference which cuts up the first octant sphere respectively.Results are accurate and reliable.Results of rockery data calculated by using the effective scanning out are close to the actual volume.
作者
刘明学
崔进业
LIUMingxue;CUI Jinye(College of Bridge, Engineering,Shaanxi Railway Institute, Weinan 714000, China;College of Geomatics, Xi＇an University of Science and Technology, Xi＇an 710054,Shaanxi, China)
出处
《测绘地理信息》
2018年第3期96-98,共3页
Journal of Geomatics
基金
国家自然科学基金资助项目(41304013)
关键词
点云三维坐标
复杂物体
体积
五面体
有向体积法
three-dimensional coordinates of the point cloud
complex objects
volume
pentahedral
directed volume method
