Research On 3D Reconstruction And Digital Protection Of Ancient Architecture Cultural Heritage Based On LiDAR Remote Sensing

Traditional ancient architectural cultural heritage protection methods have problems such as low precision and low information processing efficiency.LiDAR remote sensing combined with digital technology in the field of digital protection of ancient architectural can make up for the shortcomings of existing ancient building archiving and protection methods.As a new type of modern mapping technology,LiDAR remote sensing is widely used in ancient building surveying and mapping because of its high efficiency,high precision and high precision.The use of point cloud data for 3D reconstruction of ancient architectural is an important part of the protection of ancient architectural,and the digitalization of ancient architectural can realize the three-dimensional digital information management of ancient architectural,which can easily query and analyze the space and attribute information of ancient architectural.The application of BIM in the protection of ancient architectural can manage and preserve the building information,and real-time monitoring is the management,protection,repair,overall translation and remote restoration of ancient architectural,providing detailed and accurate engineering for the restoration of damaged ancient architectural cultural heritage.The data has practical application value for the research,utilization,dissemination and sharing of the value of these precious architectural artifacts.In addition to providing three-dimensional information,BIM can provide two-dimensional drawings directly in the digital protection of ancient architectural,providing a basis for the restoration of ancient architectural,and visualizing the repair process.Each stage of the ancient building is preserved.The use of existing ancient architectural cultural heritage components to create a "family" library,applied to the construction of damaged ancient architectural cultural heritage BIM,can complete the digital restoration of ancient architectural cultural heritage.The BIM model not only supports the acquisition of geometric information of ancient architectural,but also supports the management and preservation of attribute information.However,BIM focuses on single building management and cannot meet the needs of spatial information management of buildings;GIS focuses on macro management,especially in buildings.The advantages of information management are obvious,but the 3D building model used by GIS is insufficient in the management of ancient architectural details.The combination of BIM and GIS,on the one hand,GIS has realized the entry into the interior from the outside,from the macro into the micro,and enriched the new generation of 3DGIS technology system;on the other hand,enriched the application of BIM in the whole life cycle of the building,making up for The existing deficiencies in the archival and protection forms of ancient architectural,the permanent preservation of the digitalization of ancient architecturalBased on the combination of LiDAR remote sensing and ancient architecture informationization,this paper studies the three-dimensional reconstruction and digital protection of ancient architectural cultural heritage based on LiDAR remote sensing under the goal of “smart city”.Based on LiDAR remote sensing,the 3D rapid and fine modeling method of ancient architectural is elaborated.The method and process of point cloud data acquisition and processing are elaborated.The purpose and significance of 3D model reconstruction are analyzed.The method of 3D modeling is summarized and the point cloud based on point cloud is discussed.The rapid and fine three-dimensional modeling method is used to prepare the building of ancient architectural.The method of establishing BIM model based on point cloud data is proposed.The method and process of establishing BIM model are introduced.An ancient method combining LiDAR remote sensing and BIM is proposed.The effective expression method of building information realizes the BIM model based on point cloud data to express the life cycle information of ancient architectural,obtains the two-dimensional plan paper and component information needed for the restoration of ancient architectural,and scientifically and systematically manages the protection of ancient architectural cultural heritage.It has important reference value;a digital virtual restoration method based on BIM for ancient architectural cultural heritage is proposed.The "family" library of the same building of the existing ancient architectural is used to call the "family" library of the damaged ancient architecture cultural heritage BIM model,and the digital restoration and protection of the ancient architectural cultural heritage is completed.