一种树枝点云的骨架提取方法  

A Tree Branch Skeleton Extraction Approach Based on Point Cloud

作　　者：赵艳妮[1] 郭华磊[2] 

机构地区：[1]陕西职业技术学院计算机科学系,西安710100 [2]西安通信学院信息服务系,西安710106

出　　处：《计算机与数字工程》2016年第7期1333-1337,共5页Computer & Digital Engineering

基　　金：陕西省科技厅自然科学基金(编号:2014JM8354);陕西省教育厅重点实验室科技项目(编号:13JS083)资助

摘　　要：针对目前点云的树枝建模方法仅仅是使得树杆的骨架线与真实树枝的伸张形状相似,忽略了树杆局部细节层次的几何形状的展现的问题,论文提出一种树枝点云骨架点的提取方法。首先对能够表征真实树枝的骨架点的几何参数进行详细分析,然后对3D激光扫描仪采集的树枝的单侧点云数据中所蕴含的骨架点的几何参数进行了深入研究,得出了描述其几何特性的数学模型;接着通过求取树枝局部最优切分点集的主方向来描述骨架点的轴方向;最后通过运用LSMethod方法来拟合逼近树枝横截面圆的位置和半径两个几何参数,从而从树枝点云中准确的提取出了树枝骨架点位置、半径和轴方向三个几何参数。实验证明,该方法提取的树枝骨架点逼近了原始点云所蕴含的真实树枝的中轴线,有一定的实用价值。Aiming at the branch point cloud modeling method is only done so that the shape of the skeleton Trunk line similar to the real branches,ignoring the geometry Trunk show details of local level issues,this paper presents a point cloud branch skeleton points extraction approach.First,we are able to characterize the real point of the branches of the skeleton detailed analysis of the geometric parameters,and then 3Dlaser scanners capture branches of unilateral point cloud data inherent in the geometrical parameters skeleton point depth study,obtained describe geometric characteristics of the mathematical model.then strike the branches by local optimal cut points set to describe the main direction of the skeleton point axis direction,and finally to fit the approximate cross-section of the branches circle position and radius of two methods by using LSMethod geometric parameters to accurately extracted from a branch point cloud branch skeleton position,radius and three-axis geometry.The experimental results show that the proposed approach has a certain practical value to approximate the axis of the real tree branches contained in the original point cloud.

关 键 词：点云 骨架建模 局部最优切分 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]