利用地形开度算子自动提取激光雷达点云断裂线

doi:10.13474/j.cnki.11-2246.2018.0112

测绘通报 ›› 2018, Vol. 0 ›› Issue (4): 68-72.doi: 10.13474/j.cnki.11-2246.2018.0112

利用地形开度算子自动提取激光雷达点云断裂线

张良^1,2, 张帆^1,2, 姜晓琦³, 周佳雯^1,2, 王杰栋⁴

1. 湖北大学资源环境学院, 湖北武汉 430062;
2. 区域开发与环境响应湖北省重点实验室, 湖北武汉 430062;
3. 武汉大学遥感信息工程学院, 湖北武汉 430079;
4. 浙江省第二测绘院, 浙江杭州 310012

收稿日期:2017-08-22 修回日期:2017-11-23 出版日期:2018-04-25 发布日期:2018-05-03
通讯作者: 张帆。E-mail:zlike312@163.com E-mail:zlike312@163.com
作者简介:张良(1986-),男,博士,讲师,主要研究方向为激光雷达数据处理与应用、遥感图像处理与模式识别。E-mail:zhangliang_hubeiU@hotmail.com
基金资助:
国家自然科学基金青年基金（41601504）

Automatic Break Line Extraction from Airborne LiDAR Point Cloud Using Topographic Openness

ZHANG Liang^1,2, ZHANG Fan^1,2, JIANG Xiaoqi³, ZHOU Jiawen^1,2, WANG Jiedong⁴

1. Faculty of Resources and Environmental Science, Hubei University, Wuhan 430062, China;
2. Hubei Key Laboratory of Regional Development and Environmental Response, Wuhan 430062, China;
3. School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, China;
4. The Second Surveying and Mapping Institute of Zhejiang Province, Hangzhou 310012, China

Received:2017-08-22 Revised:2017-11-23 Online:2018-04-25 Published:2018-05-03

摘要/Abstract

摘要：

基于机载激光雷达（LiDAR）点云生产高质量的数字高程模型（DEM），需要地形特征线的约束。本文针对现有断裂线提取算法仅仅考虑了地表的局部变化，错提取率高的现状，从人工解译的角度出发，引入地形开度（topographic openness）作为一种定量描述地表整体变化的地形特征，提出了基于地形开度的断裂线自动提取算法。首先将原始地面点按高程采样成距离图像，然后通过地形开度算子获取地表的主体结构变化，最后结合形态学算子和边缘提取算子提取断裂线种子点并跟踪断裂线矢量。试验结果表明，该算法无需人工干预，能够快速提取较完整的断裂线。

关键词: 激光雷达, 数字高程模型, 点云, 断裂线, 地形开度

Abstract:

In order to produce high quality digital elevation model (DEM) based on airborne lidar (LiDAR) point cloud,break lines need to be used as constraints.Aiming at the fact that error rate of break line extraction is relatively high because of existing algorithms only consider the local variation of the earth's surface,topographic openness,starting from the manual interpretation point of view,is applied as a new operator to extract breaklines.Firstly,the original ground points are sampled into the distance images.And then the main structure changes of the earth surface are extracted by topographic openness.Finally,the seed points of the break lines are extracted by morphological operators and edge extraction operators,and the vector of the broken lines is tracked.The experimental results show that the algorithm can quickly extract complete break lines without manual intervention.

Key words: LiDAR, DEM, point cloud, break line, topographic openness

中图分类号:

张良, 张帆, 姜晓琦, 周佳雯, 王杰栋. 利用地形开度算子自动提取激光雷达点云断裂线[J]. 测绘通报, 2018, 0(4): 68-72.

ZHANG Liang, ZHANG Fan, JIANG Xiaoqi, ZHOU Jiawen, WANG Jiedong. Automatic Break Line Extraction from Airborne LiDAR Point Cloud Using Topographic Openness[J]. 测绘通报, 2018, 0(4): 68-72.

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利用地形开度算子自动提取激光雷达点云断裂线

Automatic Break Line Extraction from Airborne LiDAR Point Cloud Using Topographic Openness

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