一种基于高程差粗糙度的建筑物激光脚点提取方法

摘要

LiDAR技术逐渐成为获得城市三维信息的主要手段之一,其中建筑物信息的提取,是目前研究的难点和热点.为了能够更好地提取建筑物信息,在分析现有建筑物提取方法优缺点的基础上,结合高程信息和滤波结果信息,设计了一套基于虚拟格网的建筑物激光脚点提取方法.实验表明该方法提取效果较好,而且对数据质量要求较低.%The technology of LIDAR has gradually been developed into one of the primary means in obtaining 3D city information in which the building extraction is currently became a research focus and difficulty.In order to do building extraction better,on the basis of analyzing the advantages and disadvantages of existing building extraction methods of airborne LIDAR point cloud data,and combining the height information and filtering information,a method of building extraction based on roughness of height difference was put forward.The experimental result showed that the method had a low demand in data and could get a better result in building extraction.