Research On Ancient Building Surveying And Modeling With Terrestrial Laser Scanning

Terrestrial laser scanning technology is a new data acquisition technology, it can not only collect three-dimensional coordinates of the target object surface points, but also get their reflectance image data and information, but it also has high speed, high precision, non-contactetc., it is widely used in landslide monitoring, topographic mapping, heritage, deformation monitoring, industrial reverse engineering and other fields, the technology used to reconstruct ancient architecture mapping and three-dimensional model, the protection of the ancient buildings of great significance. The main research contents are as follows:(1)Introduces the principle and classification of terrestrial laser scanning system, analyze the laser scanner to scan accuracy and resolution, scan angle, the relationship between distance and other factors. With antique buildings as the research object, discusses the field data collection and data processing within the industry, and precautions were analyzed field data collection source of error, when data processing within the industry, the accuracy of registration errors, data classification and de-noising method, data reduction methods.(2)Describes some of the characteristics of ancient buildings line algorithms autom atically extract and extract pavilion features LMH line Hough transform method, since the automatic extraction method of characteristics can not meet the actual needs. The refore, this binding method using Cloudworx and Auto CAD point cloud data, cut, cont our extraction gazebo, breaklines and feature points, and drawing two-dimensional line graph with the traditional manual method of comparing measurements to obtain the e rror precision methods to verify the feasibility of this method.(3)Both methods use three-dimensional modeling of the pavilion, that triangulation geometry modeling and solid modeling, analysis and comparison of the advantages and disadvantages of the two methods, using Delaunay triangulation build three-dimensional surface mesh model, and its vulnerability fixes simplify, smooth triangulation to generate the final model, the texture data processing, and finally use 3ds Max software to build a solid model geometry, built on the three-dimensional model of texture mapping to give a three-dimensional model of a real scene.