Journal of University of Chinese Academy of Sciences >
Building roof point extraction based on airborne LiDAR data
Received date: 2015-09-23
Revised date: 2016-03-15
Online published: 2016-07-15
Airborne LiDAR technology is an effective method for obtaining three-dimensional spatial data of buildings with high point density and accuracy, and building roof point cloud extraction is a key process in three-dimensional digital reconstruction.This study proposes a gradually advanced method to extract building roof points.Firstly, most of vegetation points and building wall points are removed by using multiple echo and normal characteristics, which are based on filtering results.Secondly, the remaining points are segmented into clusters by using Euclidean clustering method.Finally, by combining with a digital terrain model (DTM), the points on building roofs are isolated using the building area and height characteristics.The results show that the proposed method extracts roof points based on raw LiDAR data efficiently.
Key words： airborne LiDAR; point cloud; filter; building; roof point extraction
LI Liang , WANG Cheng , LI Shihua , XI Xiaohuan . Building roof point extraction based on airborne LiDAR data[J]. Journal of University of Chinese Academy of Sciences, 2016 , 33(4) : 537 -541 . DOI: 10.7523/j.issn.2095-6134.2016.04.015
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