测绘通报 ›› 2018, Vol. 0 ›› Issue (11): 69-72.doi: 10.13474/j.cnki.11-2246.2018.0352

• 学术研究 • 上一篇    下一篇

一种依据点云法向量相似度的结构化道路提取方法

安瑶军1, 陈晓轩2, 隋立春1,3, 周荣荣1   

  1. 1. 长安大学地质工程与测绘学院, 陕西 西安 710054;
    2. 陕西省交通规划设计研究院, 陕西 西安 710065;
    3. 地理国情监测国家测绘地理信息局工程技术研究中心, 陕西 西安 710064
  • 收稿日期:2018-06-01 修回日期:2018-06-24 出版日期:2018-11-25 发布日期:2018-11-29
  • 作者简介:安瑶军(1993-),男,硕士生,主要研究方向为车载激光扫描数据处理。E-mail:824893600@qq.com
  • 基金资助:

    国家自然科学基金(41372330)

A Structural Road Extraction Method Based on Normal Vectors Similarity of Point Clouds

AN Yaojun1, CHEN Xiaoxuan2, SUI Lichun1,3, ZHOU Rongrong1   

  1. 1. College of Geology Engineering and Geomatics, Chang'an University, Xi'an 710054, China;
    2. Shaanxi Provincial Transport Planning Design and Research Institute, Xi'an 710065, China;
    3. National Administration of Surveying, Mapping and Geoinformation Engineering Research Center of Geographic National Conditions Monitoring, Xi'an 710064, China
  • Received:2018-06-01 Revised:2018-06-24 Online:2018-11-25 Published:2018-11-29

摘要:

结合结构化道路的点云法向量分布特征,提出了一种依据点云法向量相似度的道路提取方法。首先,对原始点云进行滤波处理,去除非地面点干扰;然后,对滤波后地面点云采用主成分分析法估算出各激光脚点的局部法向量及曲率值;最后,依据点云法向量相似度作为约束条件,采用改进的区域生长算法分割出路面点云。使用两组不同场景下的车载点云数据进行试验,道路提取的完整率与准确率均在93%以上。试验结果表明,该方法提取的道路精度与完整性受路面宽度、形状的影响不大,适用于城镇环境下的结构化道路提取。

关键词: 点云, 道路提取, 主成分分析, 法向量, 区域生长

Abstract:

With the distribution characteristics of point clouds in structural roads, a road extraction method based on similarity of point cloud vector is proposed. The method firstly filters the original point cloud to remove the non-ground point interference, and then uses the principal component analysis method to estimate the local normal vector and the curvature value of each laser foot point after filtering the ground point cloud. As a constraint condition, degree is used to segment the road surface point cloud using an improved region growing algorithm. Using the vehicle point cloud data under two different scenarios to carry out experiments, the completeness and accuracy of road extraction are above 93%. The experimental results show that the accuracy and completeness of the road extracted by this method are not affected by the width and shape of the road. It is applicable to the extraction of structured roads in urban environments.

Key words: point cloud, road extraction, principal component analysis, normal vector, region growing

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