关键词: 实时Web图形应用, 场景传输, 层次细节, 渐进网格

Abstract: To solve the long time needed to download large-scale scene data from Web, a selective scene transfer algorithm was proposed for real-time graphics applications (e.g. cooperative CAD and virtual touring, etc.). Based on the quantitative analysis on the contribution of the model and texture data needed to be transferred to the final display, an approach to estimate the visual importance of each object or even each polygon was proposed. Based on the measurement, an algorithm for selectively transferring the models and textures in the scene was developed and a graphic hardware acceleration based method was presented. Results from a prototype system showed that user-waiting time could be greatly reduced while image quality could be remained unchanged. So, the algorithm could be used as a powerful tool to boost the efficiency of Web-based real-time graphic applications.

Key words: Web based real-time graphic applications, scene transfer, level of detail, progressive mesh