基于航空LiDAR数据的桥梁边界线提取方法

A Method of Bridge Outline Extraction based on Airborne LiDAR Data

桥梁三维信息是构建三维数字城市和虚拟地球重要的基础空间信息。快速准确地提取桥梁边界线信息是桥梁三维提取的核心问题,也是目前的研究热点。提出了一种基于航空LiDAR数据的桥梁提取方法。该方法最大的优点是采用基于知识引导进行桥梁边界线提取,通过分析桥梁的空间结构特征和几何特征,较好地提取出桥梁边界线。通过与专家人工桥梁判读的结果比较,该方法提取结果具有较高的精度。

The three dimensional information of bridge is of great significance in building 3Ddigital city and virtual earth.Especially,the method of automatic and quickly extraction of bridge information from LiDAR data is a crucial problem.It is a concern of many scholars research focus.This paper presented a method of bridge extraction using airborne LiDAR data.The biggest advantage of the method is based on prioriknowledge by analyzing the spatial structural characteristics and geometric characteristics of the bridge.Experiments show that this method has a good accuracy compared with the result of expert interpretation.