激光雷达点云电力线三维重建模型的对比与分析

发布时间：2019-06-24 13:28

【摘要】：电力线三维重建是直升机激光雷达(light detection and ranging,LiDAR)电力巡线的一项重要内容。提出了两种基于直升机LiDAR点云的电力线三维重建模型,包括直线段与悬链线段相结合的模型(简称为"模型一")、直线段与抛物线段相结合的模型(简称为"模型二")。其中,直线段位于xy平面,悬链线段和抛物线段位于过直线段的铅垂面。模型的创新之处在于两者均使用了电力线LiDAR点水平坐标进一步投影到xy平面上相应的拟合直线产生的比例因子作为悬链线、抛物线方程的参数。使用6个有代表性的实验数据、4个评价指标对6种重建模型(已有的4种和上述提出的两种)的性能进行评价和对比。实验结果表明,模型二具有最高的重建效率和最高的重建精度。另外,实验结果进一步说明铅垂面及铅垂面上投影模型的选择、误差因素的考虑等3个因素对重建模型性能有着显著影响。
[Abstract]:Power line 3D reconstruction is an important part of helicopter lidar (light detection and ranging,LiDAR) power patrol. Two 3D power line reconstruction models based on helicopter LiDAR point cloud are proposed, including the combination of straight line segment and catenary segment ("Model 1" for short) and the model of combining straight line segment with parabola segment (referred to as "Model 2" for short). Among them, the straight line segment is located in the xy plane, and the catenary segment and the parabolic line segment are located on the vertical surface of the straight line segment. The innovation of the model is that both of them use the proportional factor produced by the horizontal coordinate of the power line LiDAR point projected to the xy plane as the parameters of the catenary and parabola equation. Six representative experimental data and four evaluation indexes were used to evaluate and compare the performance of six reconstruction models (the existing four and the two proposed above). The experimental results show that Model 2 has the highest reconstruction efficiency and the highest reconstruction accuracy. In addition, the experimental results further show that the selection of the projection model on the vertical surface and the consideration of the error factors have a significant impact on the performance of the reconstruction model.
【作者单位】：国家测绘产品质量检验测试中心;武汉大学资源与环境科学学院;中国测绘科学研究院;城市空间信息工程北京市重点实验室;
【基金】：国家自然科学基金(41371405,41671440) 城市空间信息工程北京市重点实验室开放基金(2015102)~~
【分类号】：TM755

【相似文献】