Dissertation > Excellent graduate degree dissertation topics show

Geometry Simplification for Buildings in Virtual City

Author: LiuYanLi
Tutor: ZhouJianZhong
School: Huazhong University of Science and Technology
Course: System Analysis and Integration
Keywords: Level of detail mesh simplification progressive mesh virtual scene
CLC: TP391.9
Type: Master's thesis
Year: 2005
Downloads: 320
Quote: 3
Read: Download Dissertation

Abstract


Virtual city is usually based on the detail and huge-sized geometric models. These models, often represented as complex triangle meshes. It costs much and takes times to build virtual cities and it also takes much time to visualize in real time. To reduce the rendering time the geometric models are usually managed in the LOD (level-of-detail) strategy. The traditional method is to set up different LOD models by hand. This kind of method has kept a lot of copies of the primitive model; each copy corresponds to a certain models of specific resolution. It cost much time to load these geometric models, and it will present the popping on the vision when switch over among different LOD models. Our suggested method in this paper uses the opposite approach to that of virtual city. It based on the mesh simplification for constructing a progressive mesh representation from an arbitrary mesh. Thus the data are kept as compact as possible and then the data building time in addition to the loading time is reduced significantly. This paper proposed a novel edge-collapse based LOD algorithm to simplify the geometric models of architecture and simultaneously preserve the characteristic edge. Our method makes pre-simplified progressive mesh as a function of normal and edge-energy. We collapse the edges with closed normals in order to keep the characteristic planes, and collapse the edges by the control of edge-energy.

Related Dissertations

  1. Research on Visualization of Data and Accelerate Rendering Method Based on Virtools,TP391.41
  2. A Research on Mesh Simplification and Surface Subdivision,TP391.41
  3. Research on Virtual Scene of Virtual Training System,TP391.9
  4. Research on Organization and Visualization of Global Terrain Data,TP391.41
  5. Research and Development of System for Reconstruction and Optimization of 3D Mesh Model,TP391.41
  6. On the Progressive Mesh Simplification Algorithms in Virtual Environment Based on LOD Technology,TP391.9
  7. LOD-Mesh Generation Based on Carving Operator,TP391.41
  8. 3D model simplification algorithm demo platform,TP391.41
  9. Research on the 3d Real-time Interactive Computer Aided Design System of Highway and Its Kernel Arithmetic,TP391.41
  10. Three-dimensional model for mobile platforms Progressive Compression Algorithm and Implementation,TP391.41
  11. Research on Optimization Techniques of Complex Scene,TP391.41
  12. The 3D Model Simplification Technology in Virtual Reality,TP391.41
  13. Research and Implementation of 3D Model Watermarking Algorithms,TP309.7
  14. Research Triangle mesh parameterization,TP391.41
  15. Simplification Algorithm for Complex Models Based on Multiresolution,TP391.41
  16. Research on Image-Based Rendering Panorama Space Based on Virtual Reality,TP391.9
  17. Research on the Technique of 3D Reconstruction and Measurement of Vertebra Based on CT Image,TP391.41
  18. Distance-weighted Quadric Error Metric Simplification Algorithm Based on Triangle Collapse,TP391.41
  19. The Typical Road Traffic Scene Design and Implementation for Drivers’ Safety Awareness Training,U491
  20. Research of Interaction between 3D Virtual Scene Based on VRML and 2D Map,TP391.9
  21. Research and Implementation on the Algorithm of LOD Model Simplification,TP391.41

CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Computer simulation
© 2012 www.DissertationTopic.Net  Mobile