A Three-dimensional Information Extraction Method for Public Buildings Based on Laser Ranging Data
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.
laser rangingpublic buildings3D information extraction
NETL
NSTL
万方数据
维普
