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针对既有道路特征精确提取的难题,该文提出了一种基于断面剖分的线状道路特征提取方法。通过引入断面剖分思想,将所采集的密集三维激光点云投影到二维剖分切片中进行处理,简化了特征提取难度。针对不同的特征形态,分别采用基于RANSAC稳健估计直线拟合求交的方法和基于道路特征点云模板配准的方法来获取道路特征点的精确位置。通过对某公路工程路缘石、护栏等简单和复杂线状道路特征进行试验,验证了该文方法的有效性。
Aiming at the problem of accurate extraction of existing road features, this paper proposes a method of feature extraction of linear road based on sectioning. By introducing the idea of sectioning and dividing, the dense three-dimensional laser point cloud collected is projected onto two-dimensional sectioned slices for processing, which simplifies the feature extraction. According to different morphological features, the method of straight line fitting and intersection based on robust estimation of RANSAC and the method of registration based on the template of road feature point cloud are respectively used to obtain the exact location of the road feature points. By testing the characteristics of simple and complex linear roads such as curbs and guard rails of a highway project, the validity of this method is verified.