摘要
利用三维激光扫描测量技术测得的点云数据获取数字地面模型的关键之处在于将地面点与非地面点进行分离。提出了一种基于高程直方图进行多阈值分割的方法。首先对点云进行离散化,然后进行多阈值分割分层,再对各层中的地面点进行连通,最后利用趋势面拟合法再次对各层地面点进行滤波,最终即可获取纯净的地面点。经试验验证,该方法有效可行。
The key of obtaining digital terrain model through using point cloud data measured by three-dimen- sional laser scanning technology is to separate the ground points and non-ground points. A method was put forward based on height histogram threshold segmentation. Firstly the point cloud data were discretized, and then threshold segmentation were threshdded and connected with the ground points of each layer, and finally trend surface fitting to each point was used to filter on the ground, eventually pure ground points can be obtained. It has been verified by experiment that this method is effective and feasible.
出处
《科学技术与工程》
北大核心
2014年第18期1-5,24,共6页
Science Technology and Engineering
关键词
点云数据
高程直方图
单阈值分割
多阈值分割
连通
趋势面拟合
point cloud dataheight histogram single threshold segmentationmentation connection trend surface fittingmulti-threshold seg-
