三维坐标转换在震后建筑物LiDAR点云中的应用  

Application of Three-dimensional Coordinate Transformation to LiDAR Point Clouds of Post-earthquake Buildings

作　　者：杨凡 温超[2] 范志伟[2] 刘晓丹[2] 王晓山[1,2] 李志强 李晓丽[4] Yang Fan;Wen Chao;Fan Zhiwei;Liu Xiaodan;Wang Xiaoshan;Li Zhiqiang;Li Xiaoli(Hebei Hongshan National Observatory on Thick Sediments and Seismic Hazards,Xingtai 055350 China;Hebei Earthquake Agency,Shijiazhuang 050021 China;Institute of Geology,China Earthquake Administration,Beijing 100029 China;China Earthquake Networks Center,Beijing 100045 China)

机构地区：[1]河北红山巨厚沉积与地震灾害国家野外科学观测研究站,河北邢台055350 [2]河北省地震局,石家庄050021 [3]中国地震局地质研究所,北京100029 [4]中国地震台网中心,北京100045

出　　处：《华北地震科学》2023年第3期28-35,共8页North China Earthquake Sciences

基　　金：河北省地震科技星火计划项目(DZ2021120300001)。

摘　　要：为了解决建筑物LiDAR点云数据震害信息定量分析中坐标系转换的问题,对经过滤波、去噪、分割提取的建筑物独立墙面LiDAR点云数据进行了三维坐标转换,并与仪器配套软件的转换结果进行对比验证,坐标系转换算法的结果与x轴方向水平线吻合,优于软件转换结果。该方法的建立降低了数据处理过程中人为误差因素,提高了地基LiDAR点云数据坐标系转换的精准性和准确性,有助于提高震后建筑物LiDAR点云数据处理分析的效率,为后期建筑物震害信息定量分析判定奠定理论基础和技术支撑。As an emerging active remote sensing technology,ground-based 3D laser scanner is gradually applied to various fields such as surveying,and it is the main way to obtain ground target data with the advantages of high accuracy and high efficiency,but the coordinate system of LiDAR point cloud data acquired by it exists randomly relative to the internal coordinate system of the instrument system.In order to solve the problem of coordinate system conversion in quantitative analysis of seismic damage information of building LiDAR point cloud data,this paper establishes an origin coordinate system conversion method based on three-dimensional coordinate system conversion matrix for LiDAR point cloud data extracted by filtering,denoising and segmentation of building independent walls.Comparing the conversion results with the results of the instrument supporting software,we verifies that the results of the coordinate system conversion algorithm coincide with the horizontal line in the X-axis direction and are better than the software conversion results.The establishment of the method in this paper reduces the human error factor in the data processing,improves the precision and accuracy of the coordinate system conversion of foundation LiDAR point cloud data,improves the efficiency of post-earthquake LiDAR point cloud data processing and analysis of buildings,and lays the theoretical foundation and technical support for the later quantitative analysis and determination of building damage information.

关 键 词：三维激光扫描仪 LIDAR 坐标转换 建筑物 地震 

分 类 号：P315-39[天文地球—地震学]