The Methodology And Application Of Campus Street View Map Making Based On Portable 3D Laser Measuring System

The second generation street view map based on the portable 3D laser scanners,can not only provides panoramic image services,but also point cloud data.Street view maps for campuses,especially in colleges and universities,are the suitable carriers to provide the campus reality to users.Vehicle-mounted portable 3D laser scanner is the most common street view map data collection equipment,but for small areas,such as campus,which has a lot of narrow or hidden areas that are not convenient for vehicles to get in.In these kind of scenarios,portable 3D laser scanner has its advantages.In this thesis,based on the campus street view establishing project of Guangzhou Architectural Engineering Vocational School,the researches of the whole work flow of using Hi Scan-P bag pack portable scanner to collect original data,then using the software includs Inertial Explorer?HD Data Combine?HD Pano Factory?HD₃LS_SCENE?HD Pt Cloud Street View and HD Map Cloud Server to finish the POS calculating?fusion calculating?panoramic joint?data preprocessing?street view data producing and publishing,are presented.To be more specific,the researches include: the method and suggestions of panoramic images checking;the method and comparison of data matching between images and point cloud data,and propose the rectification suggestion of “adjust the parameters of camera firstly,then modify the HDI values”.In addition,the application of Street View Map is described in detail from two aspects of front-end browsing and background data.Front-end browsing mainly studies the application of assistant professional teaching,background data mainly studies the application of DEM production and point cloud modeling.The main conclusions of this paper are as follows:?1?Based on the Street View Project of Area A of Guangzhou Construction Engineering Vocational School,this paper studies the whole process of making the Street View of Campus.The street view of Guangzhou Vocational School of Architectural Engineering Area A based on point cloud and image is generated and can be applied online.?2?Aiming at panoramic image mosaic,the methods of panoramic image inspection and processing are studied emphatically.Different panoramic images are processed and compared,and the results are analyzed.It is proposed that "rod-shaped ground object staggered layer is edited by splicing line;serious mislocation and obvious deformations of buildings are edited by controlling points;two images of similar scenes are corrected by parameters." The method of image patching is used to deal with small spot or stain.?3?Aiming at the problem of image and point cloud registration,the registration principle is studied,and the semi-automatic matching method based on sensors is adopted for registration.Through practice,the registration proposal of "modifying the camera database first and then modifying the HDI file locally" is obtained.?4?Through the application practice of campus street scenery assistant specialty teaching,it is concluded that adding annotation improves the teaching efficiency obviously and the accuracy of teaching evaluation is insufficient.