基于激光测距数据的公共建筑物三维信息提取方法  

A Three-dimensional Information Extraction Method for Public Buildings Based on Laser Ranging Data

作　　者：师倩[1] 阮国杰[1] SHI Qian;RUAN Guojie(College of Surveying and Mapping Engineering,Gansu Forestry Technological College,Tianshui 741020,Gansu,China)

机构地区：[1]甘肃林业职业技术学院测绘工程学院,甘肃天水741020

出　　处：《科技和产业》2024年第1期247-251,共5页Science Technology and Industry

基　　金：甘肃林业职业技术学院2023年大学生创新训练项目(20231283526)。

摘　　要：常规方法进行公共建筑物三维信息提取时易出现信息提取不准确、数据分析存在误差等情况。基于激光扫描技术激光测距数据设计一种方法,对甘肃省天水市一公共建筑物的三维信息进行提取。将数据进行获取和预处理,按要求获得点云数据,根据获取的外业点云数据开展对扫描点云数据的预处理。此操作后基于激光测距数据获取建筑物边缘轮廓信息,采用Carmy算子来检测边缘并通过形态学标记,对上述检测到的边缘信息二值图像连通区域一一标记,并基于激光扫描得到的像素点计算边缘矩形尺寸。最后经过三维激光扫描和双向投影后,依据激光采样点提取建筑物三维信息。经实例分析后,对提取的数据信息与实际信息进行比较,证明所提方法可有效降低激光测量的误差,提高公共建筑物三维信息提取的准确性,具有较好的应用价值。Conventional methods for extracting three-dimensional information of public buildings are prone to inaccurate information extraction and errors in data analysis.A method based on laser scanning technology and laser ranging data is designed to extract three-dimensional information of a public building in Tianshui City,Gansu Province.Obtain and preprocess the data,the point cloud data as required is obtained,andthe preprocessing of the scanned point cloud data is carried out according to the obtained field point cloud data.After this operation,the edge contour information of the building is obtained based on the laser ranging data,and the Carmy operator is used to detect the edge and mark it through morphological marking,and the above-mentioned detected edge information binary image connection area is marked one by one,and the edge rectangle size is calculated based on the pixels obtained by laser scanning.Finally,after 3D laser scanning and two-way projection,the 3D information of the building is extracted according to the laser sampling point.After case analysis,the extracted data information is compared with the actual information,and the error is within the allowable range,so the three-dimensional information extraction method of public buildings based on laser ranging data has usability.

关 键 词：激光测距 公共建筑物 三维信息提取 

分 类 号：G642[文化科学—高等教育学]