Image-Based Digital Campus Implement And Technology Research

Based on the traditional campus, digital campus is using advanced information methods and tools to form a digital space by digitalizing various resources on actual campus. Virtual campus touring system, part of the digital campus, shows the outlook of the campus via virtual reality technology under the computer environment. Visitors could surf on the virtual campus and enjoy the amorous feeling on the culture without actual visit on site.Image Based Rendering (IBR) is a new method that has been widely used in creating a virtual reality system. It is preferred over the traditional 3D geometry modeling and rendering technology that has its limitations on rendering quality and scene complexity. IBR is based on the theory and method of computer vision and image processing, and it uses photo-realistic renderings and warping. It is appealing since natural scenes, which are very difficult to model using traditional 3D geometry modeling, can be acquired semi-automatically using cameras and other devices. Also IBR has a potential to create high-quality output images if the rendering stage can preserve the quality of the reference images.In this paper, the concept and construction of digital campus are studied mostly, and a virtual touring campus constructed based on IBR technique is implemented, several key techniques of virtual environment touring based on image are studied, which include image mosaicing ,panoramic image generation and view organization and scene touring. The main works are detailed as followed:1) The development process of digital campus is reviewed, and the status of digital campus in both inland and overseas is discussed. The concept and content are also discussed.2) The key technique of virtual campus - image based rendering(IBR) is discussed, the advantage and disadvantage of several kinds of IBR technique are analyzed.3) The generation of cylinder panoramic image is studied, the image mosaic process is discussed in emphatically, the advantage and disadvantage of general image mosaicing algorithms are discussed. Moreover, an image mosaicing algorithm based on image edge feature is implemented.4) Some methods of scene touring are summarized, and the view organization and storage of image data are discussed. A framework of scene touring system is...