Research And Practice Of The Visualization Technology On The Reconstruction Of Realistic Scenes

With the rapid development of various technologies, such as computer hardware, virtual reality technology, visualization and graphics, a new field - Realistic scene reconstruction has developed in recent years. This technology plays a very important role in the computer reconstruction of historic relic, virtual display and the computer reconstruction of damaged relic. The scenes for the reconstruction process there exist ? large amount of data redundancy, incomplete scenes information and other issues, the realistic scene of the reconstruction carried out in-depth research, mainly on the following:Focus on the establishment of 3D model of the terrain and building. We take pretreatment of data by Cyra 3D laser scanner. Based on OpenGL, the terrain is reconstructed on grid methods and the building is reconstructed on irregular methods. Terrain model using DEM data form and improved Delaunay Triangulation method is used in the building reconstruction.This can avoid the large number of data redundancy by using only one Modeling methods. It makes a good foreshadowing of the model level of detail shows.Based on the level of detail (LOD) technology to simplify scenes in the ROAM algorithm, given the algorithm to improve the block strategy. For 3D terrain data, shows that when all the models show that not all the characteristics, consider distance of seeing and the terrain circumstance, the realization of the ROAM algorithm to improve the block, be used to achieve real-time rendering of the terrain, dynamic changes in topography shows that the level of details, economize the calculation resources effectively, raise the processing speed of the data.Designing and implementing a Realistic scenes 3D visualization system. As an example small wild goose pagoda realistic scene has been has been designed and implemented, experimental verification of the results of this study on the feasibility and effectiveness.In short, the solution proposed by this paper solves some problems of Realistic scene reconstruction in a certain degree effectively.