从城市道路点云数据中快速提取架空线路及其参数

Quick extraction of overhead lines and parameters from urban road point cloud data

城市架空输电线路在城市供电网络中起到重要的基础作用,需要及时负责地对线路进行检测。使用三维激光扫描技术在短时间内获取大量高精度、高密度点云,滤波后使用主成分分析获取主方向,基于投影的连通性进行单根电线的分割与参数提取。实验结果表明,本文算法能有效提取城市点云中的架空输电线路,对于城市场景的2174万点云处理时间为27.69 s,单根输电线参数提取结果与手工计算值的平均误差为0.022m,满足城市架空输电线路态势感知的效率与精度需求。

Urban overhead transmission lines play an important fundamental role in urban power supply networks and require timely and reliable detection.Three-dimensional(3D)laser scanning technology was used to obtain a large number of highprecision and high-density point clouds in a short period of time.After filtering,principal component analysis was used to obtain the principal direction and segment and extract parameters of a single wire based on the connectivity of the projection.The experimental results show that the algorithm proposed in this paper can effectively extract overhead transmission lines from urban point clouds.The urban scene-based processing time for 21.74 million point clouds is 27.69 seconds,and the average error between the parameter extraction results of a single transmission line and the manually calculated values is 0.022 meters,meeting the efficiency and accuracy requirements of situation awareness of urban overhead transmission lines.