Augmented Reality Based Display Of 3D Scenes

With the development of three-dimensional(3D) graphics modeling method and graphics hardware,3D modeling as a kind of presentation method are widely used in design, virtual reality,3D game, multimedia teaching, molecular biology and 3D geographic information system, and so on. However, most of the 3D scenes are simply built through montaging of 3D models, and completely showed in virtual environment. Thus, users can only interact with virtual environment. How to join 3D scene with the reality, and enable users to interact with both 3D scene and the reality for improving the user experience, are the main problems discussed in this thesis.First, we introduce the basic concepts of augmented reality technology. Then, for the large-scale realtime dynamic scene, we design the operation flow of marker based augmented reality for 3D scene display, and further propose two solutions to solve the problem of marker occluded. Moreover, for the problem of trival model search, we allow users to draw sketches on blank marker, study how to extract information from hand sketches and use these information to retrieve 3D models for generating and augmented display of 3D scene. Finally, based on the above methods, we develop the subsystem of augmented display of the large-scale realtime dynamic scene, and realize fusion display of the 3D scene and the reality.