基于线特征的大规模城市场景点云配准算法  

Point Cloud Registration Algorithms for Large-scale Urban Scenes Based on Line Features

作　　者：蒋红彪 炊宇恒 张同刚 贾月江 李文君 陈婷婷 熊鑫 JIANG Hongbiao;CUAN Yuheng;ZHANG Tonggang;JIA Yuejiang;LI Wenjun;CHEN Tingting;XIONG Xin(Surveying and Mapping Engineering Brigade of Sichuan Metallurgical Geological Exploration Bureau,Chengdu 611756,China;Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China)

机构地区：[1]四川省冶金地质勘查局测绘工程大队,四川成都611756 [2]西南交通大学地球科学与环境工程学院,四川成都611756

出　　处：《测绘与空间地理信息》2024年第12期178-181,共4页Geomatics & Spatial Information Technology

摘　　要：针对大规模城市场景下同名线对精度不足导致点云配准不准确的问题,提出了基于线特征的大规模城市场景点云配准算法。首先,该方法对机载点云和车载点云中的建筑物进行3D特征线的检测和筛选,并将特征线分为横向特征线和纵向特征线两组;其次,基于线段豪斯多夫距离(Line segment Hausdorff Distance,LHD)进行初始3D同名线对的搜索;然后,通过平面拟合与相交的方法对精度不足的纵向同名线对进行优化,并设计不同组合的同名线对配准方案;最后,利用RLMR-FMII 2配准算法实现不同配准方案的点云精确配准,得出最优的配准方案。采用实测点云进行实验,得出基于优化后的纵向同名线对的配准方案为最优方案,实验结果表明该算法能够实现大规模点云的精确配准。Aiming at the problem of inaccurate point cloud registration due to insufficient accuracy of corresponding line pairs in large-scale urban scenes,a point cloud registration algorithm for large-scale urban scenes based on line features is proposed.Firstly,the method detects and screens the 3D feature lines of buildings in airborne point cloud and vehicle-borne point cloud,and the feature lines are divided into two groups:horizontal feature lines and vertical feature lines;secondly,the initial 3D corresponding line pairs is searched based on the line segment Hausdorff distance(LHD);then,the corresponding line pairs with insufficient accuracy are optimized by plane fitting and intersection methods,and different combinations of the corresponding line pair registration schemes are designed;finally,the existing RLMR-FMII 2 registration algorithm is used to achieve accurate registration of point clouds with different registration schemes,and the optimal registration scheme is obtained.Using the measured point cloud to conduct experiments,it is concluded that the registration scheme based on the optimized vertical corresponding line pairs is the optimal scheme.The experimental results show that the algorithm can achieve accurate registration of large-scale point clouds.

关 键 词：大规模城市场景 线段豪斯多夫距离 平面拟合与相交 配准方案 

分 类 号：P225[天文地球—大地测量学与测量工程] TN959.73[天文地球—测绘科学与技术]