机载LiDAR点云数据中电力线的提取方法研究
Powerlines Extraction Techniques from Airborne LiDAR Data
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摘要: 提出了一种基于机载LiDAR点云数据的电力线提取方法。首先在进行LiDAR数据滤波的基础上,分离地面点与非地面点;然后针对非地面点采取一种基于角度的滤波方法,分离非地面点中的植被点与电力线点,对电力线点,采用二维Hough变换进一步分离各条电力线点;最后使用双曲余弦函数模型,对单条电力线进行曲线拟合。实验结果表明,该方法能够从LiDAR点云数据中较完整地提取出电力线点,电力线点提取正确率达96.2%,并能够对电力线走廊进行三维重建。Abstract: A kind of powerlines extraction method based on airborne LiDAR point clouds data is introduced.Firstly,a TIN densification filter is used to separating the ground points and object points.Then,an angle filter is adopted for extracting powerlines points from object points.For the powerlines points,a 2D Hough transform method is used to separating these several lines.Finally,a hyperbolic cosine function model is used for the single line curve fitting.The experimental results show that the powerlines points could be relatively complete extracted from LiDAR data using this method,the accuracy of powerlines points extraction is 96.2% and the 3D reconstruction of powerlines corridor is also procured.
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