基于凸包算法的隧道点云中轴线提取  

Tunnel Axis from Point Cloud Via Convex Hulls

作　　者：赵昭明 何华 李郭超 梁宝新 孟文宾 张璞金 Zhao Zhaoming;He Hua;Li Guochao;Liang Baoxin;Meng Wenbin;Zhang Pujin(Information Engineering University,Zhengzhou,China;PLA 93920,Xi'an,China)

机构地区：[1]战略支援部队信息工程大学,河南郑州 [2]中国人民解放军93920部队,陕西西安

出　　处：《科学技术创新》2024年第19期37-40,共4页Scientific and Technological Innovation

摘　　要：本文提出了一种改进的基于凸包算法与多项式拟合的隧道中轴线提取方法。该方法通过对点云数据进行精细切分、凸包计算、圆柱体拟合、三次B样条插值和多项式曲线拟合等步骤,准确捕捉隧道姿态,提取隧道中轴线,为其形变评估提供了坚实基础。实验表明,该算法在模拟数据和实测数据上均表现出色,提取的中轴线精度高、光滑性好,且算法抗差性强,更为高效,为隧道安全监测和后续设计施工提供了有力支持。This paper presents an improved method for extracting the central axis of tunnels based on the convex hull algorithm and polynomial fitting.Through precise segmentation of point cloud data,convex hull calculation,cylinder fitting,cubic B-spline interpolation,and polynomial curve fitting,this method accurately captures the tunnel's posture and extracts its central axis,providing a solid foundation for its deformation assessment.The results demonstrate that the algorithm performs well on both simulated and measured data,delivering a central axis with high precision and smoothness.Additionally,the algorithm exhibits strong robustness and efficiency,providing valuable support for tunnel safety monitoring and subsequent design and construction.

关 键 词：隧道中轴线 凸包计算 圆柱体拟合 

分 类 号：U456[建筑科学—桥梁与隧道工程]