测绘科学技术学报2025，Vol.41Issue(1)：68-73,6.DOI:10.3969/j.issn.1673-6338.2025.01.010
一种顾及几何约束的机载LiDAR点云建筑物轮廓线提取方法
An Automatic Extraction Method of Building Outlines Based on Airborne LiDAR Point Cloud Data with Emphasis on Geometric Constraints
摘要
Abstract
Buildings are the main feature in urban area and the accurate extraction of building outlines is essential for building reconstruction.Airborne LiDAR(Light Detection and Ranging)technology is a relatively new way to obtain the earth's surface information directly,and the point cloud data generated by this way can be used for building outline extraction.For the problem that the threshold radius is not easily controlled in the extraction of the contour lines from point cloud data,a method of extracting building contour lines directly from airborne LiDAR point cloud data is proposed in this paper.Firstly,the original building edge points are extracted,and the trigono-metric functions and slopes are utilized to obtain initial contour points.Secondly,outline fitting is conducted using polynomial and least squares principles.Then,the fitted outlines are regularized and extended.Finally,the coordi-nate of each corner point can be calculated.According to the error of the corner points obtained from the experi-mental results,it is evident that the complete building outlines can be accurately extracted from the point cloud da-ta by using the proposed method.关键词
机载激光雷达/轮廓点提取/轮廓线拟合/轮廓线规则化/几何约束Key words
airborne LiDAR/edge point extraction/outlines fitting/outline regularization/geometric constraints分类
天文与地球科学引用本文复制引用
石义煌,蔡湛..一种顾及几何约束的机载LiDAR点云建筑物轮廓线提取方法[J].测绘科学技术学报,2025,41(1):68-73,6.基金项目
湖北省教育厅科研中青年人才项目(Q20202801) （Q20202801）
湖北科技学院博士启动基金项目(L07903/170428). （L07903/170428）
