长江科学院院报 ›› 2018, Vol. 35 ›› Issue (2): 151-154.DOI: 10.11988/ckyyb.20161047

• 信息技术应用 • 上一篇    

基于特征差异的机载LiDAR侵蚀沟点云分割方法

许 颖1,2,岳东杰2,孟德友1   

  1. 1.河南财经政法大学 资源与环境学院,郑州 450046;
    2.河海大学 地球科学与工程学院,南京 211100
  • 收稿日期:2016-10-10 出版日期:2018-02-01 发布日期:2018-03-01
  • 作者简介:许 颖(1986-),女,河南柘城人,讲师,博士,研究方向为点云数据处理与应用。E-mail:xy1986630@163.com
  • 基金资助:
    国家自然科学基金项目(41501178);水利部重点实验室开放研究基金项目(2015003)

Point Cloud Segmentation of Erosion Gully from AirborneLiDAR Data Based on Characteristic Difference

XU Ying1,2, YUE Dong-jie2, MENG De-you1   

  1. 1.Institute of Resources and Environment, Henan University of Economics and Law, Zhengzhou 450046,China;
    2.School of Earth Sciences and Engineering, Hohai University, Nanjing 211100, China
  • Received:2016-10-10 Online:2018-02-01 Published:2018-03-01

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摘要： 为克服数字高程模型(Digital Elevation Model, DEM)提取侵蚀沟特征的局限性,提出一种基于机载激光雷达(Light Detection and Ranging,LiDAR)点云的不同尺度下的表面特征差异侵蚀沟点云分割方法。该方法首先对侵蚀沟点云进行特征分析,在对点云预处理的基础上,基于不同尺度获取点云表面特征差异,再结合曲率阈值方法分割得到初始侵蚀沟,最后基于聚类分析得到侵蚀沟点云。试验结果表明,该方法能够精确地从机载LiDAR点云中分割得到侵蚀沟,为侵蚀沟的定量评价提供了一种新思路。

关键词: 机载LiDAR, 侵蚀沟, 点云数据, 分割方法, 表面特征

Abstract: To overcome the limits of Digital Elevation Model in extracting erosion gully features, a method of point cloud segmentation for airborne LiDAR data based on characteristic difference is proposed. Firstly, the characteristics of point cloud of gullies are analyzed, and then the differences in surface features are obtained based on different scales after preprocessing of the point cloud. Initial gullies are segmented from point clouds with the aid of a curvature threshold. Finally, real gully point clouds are obtained based on clustering analysis. The experimental results demonstrate that gullies can be detected accurately with airborne LiDAR point clouds, and the present method provides a new idea for quantitative evaluation of gullies.

Key words: airborne LiDAR, erosion gully, point cloud, segmentation, surface feature

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