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测绘学报  2013 

车载激光扫描的三维道路自动提取方法

, PP. 260-267

Keywords: 车载LiDAR,激光点云,道路提取,扫描线,移动窗口

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Abstract:

车载激光扫描系统获取的复杂道路环境点云数据量大、目标复杂,难以有效提取出道路的点云。本文通过分析扫描线上激光点云的空间分布和统计特征,提出一种适用于复杂道路环境的道路点云自动提取方法。该方法首先根据点的扫描角度或GPS时间信息提取扫描线;利用移动窗口法进行高程滤波,提取地面点云,然后采用基于路坎模型的移动窗口法提取路坎点;利用局部区域相邻扫描线的相似性特点,对提取的路坎点云进行跟踪和优化;最后利用优化后的路坎作为道路的边界实现道路路面精确提取。经过实验和分析,该方法不仅适应于有固定道路宽度的结构化道路提取,同样适用于无固定宽度的复杂道路提取。

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