A Video-Based Rendering Acceleration Algorithm for Interactive Walkthroughs

摘要

We present a new approach for faster rendrring of large synthetic environments using video-based representations. We decompose the large environment into cells and pre-compute video based impostors using MPEG compression to represent sets of objects that are far from each cell. At runtime , we decode the MPEG streams and use redndering algorithms that provide nearly constant-time random access to any frame. The resulting system has been implemented and used for an interactive walkthrough of a model of a house with 260,000 polygons and realistic lighting and tedxtures. It is able to render this model at 16 frames per sceond (an eightfold improvement over simpler algorithms) on average on a Pentium II PC with an off-the-shelf graphics card.