Research On 3D Reconstruction Technology Fusing Multi-source Data

With the development of Surveying and Mapping Science and technology,the technology of three-dimensional reconstruction has been more widely studied.From the initial two-dimensional plane data to the present three-dimensional laser scanning technology and photogrammetry technology,the three-dimensional reconstruction of objects is accomplished by different data acquisition methods and modeling methods.Modeling of a single data source has certain limitations and narrow scope of application.For complex scene modeling,it is far from meeting the requirements of actual modeling.Therefore,the technology of three-dimensional modeling based on multi-source data fusion has been studied more deeply.This paper focuses on the three-dimensional modeling technology which fuses different data sources,and carries out the three-dimensional reconstruction task according to the modeling requirements of different research areas.Taking a large karst cave as an example,in the stage of three-dimensional laser point clo ud data acquisition,different scanning methods are used to acquire point cloud data.Through comparative analysis,different data acquisition methods should be selected under different conditions,and the final point cloud splicing accuracy and field data acquisition efficiency under different modes are obtained accordingly.The close-range multi-baseline shooting based on three-dimensional laser scanning technology is expounded.Fine modeling of stalactite supplemented by shadow measurement,two different modeling methods and fusion methods are used to compare the advantages of fusion modeling.Taking steep cliff as the research area,this paper elaborates the model fusion of tilt photogrammetry and three-dimensional laser scanning technology by building a simple buffer zone,so as to solve the triangular mesh weight caused by model fusion under the premise of meeting the needs of Engineering projects.Taking substation modeling as an example,this paper introduces the method of model building based on 3D max,which combines a variety of measurement data,effectively reduces the workload and improves the efficiency of modeling.Generally speaking,multi-source data fusion modeling can effectively remedy the shortcomings of single modeling method.It is a trend to choose different data fusion modeling according to different scenarios.