结合影像的LIDAR数据三维建筑物提取

A method of 3D buildings extraction from LIDAR data based on image

随着LIDAR技术的出现,三维建筑物的提取也受到越来越多的重视。由于LIDAR数据分布的不连续性和不规律性,直接从机载激光扫描测距数据中进行建筑物提取较为困难。本文提出了一种结合灰度影像的LIDAR数据三维建筑物提取方法,分三个步骤:首先对灰度影像进行建筑物二维提取;然后将处理后影像和LIDAR数据粗匹配,初步确定LI-DAR数据中的三维建筑物区域;最后利用一组阈值操作进行三维建筑物的精确提取。实验结果表明该方法简单实用,适应性强。

Along with the appearance of LIDAR,the extraction of 3D buildings becomes more and more important.Because of the discontinuity and irregularity of the LIDAR data,it is difficulty that building characters are extracted from LIDAR data directly.A new method of the 3D building characters extraction from LIDAR data based on image is presented in this paper.The method consists of three steps.First,2D building characters are extracted by processing the image.Second,the image and LIDAR data are matched to confirm the region of extracted buildings in the LIDAR points.Third,3D buildings characters are accurately extracted by a group of thresholds.The experimental results illustrate the advantage and applicability of this method.