Biography
Biography: Vishal Verma
Abstract
Image-based rendering (IBR) is a new powerful approach to computer graphics that allows three-dimensional objects and scenes to be visualized in a realistic way without full 3D geometric model reconstruction. Conventional computer graphics systems use geometry-based rendering (GBR) techniques to render three-dimensional objects or scenes. These techniques produce images from 3D geometric model of the scene which may include a variety of information like geometry of scene objects, position of light sources, optical properties of the surfaces, viewer position, and so forth. The main bottleneck of GBR pipeline is that model generation is a time consuming process and is highly dependent on the scene complexity. Further, such systems have a limited ability to construct a photo-realistic virtual environment. Thus, the researchers in the field of computer graphics have recently turned to IBR techniques due to many forces like these techniques are computationally less expensive, close to photorealism, and their rendering time is usually constant and does not depend upon the scene complexity. IBR techniques use pre-acquired reference images together with other parameters like depth maps, positional correspondences etc. in order to synthesize the arbitrary views of an object or scene. These techniques have many potential applications in the domains like virtual reality, electronic games, sports broadcasting, 3D-Television, movie industry, mobile/ handheld devices etc. The objective of this talk is to discuss the concept of image-based rendering, fundamental principles behind various IBR techniques, and the strengths & limitations of each technique.