虚拟与增强现实研究进展

虚拟与增强现实是一门集多媒体数据分析、合成和场景重构的综合学科。该学科主要研究真实感图像合成，虚拟和真实物体的融合，大规模虚拟环境中的动态表达等。该学科的研究成果有：与环境无关的高质量图像的获取；降低实时场景导航和交互计算；交互运动的多元环境下的一致性。我们的研究主要在构造真实场景的模型及其实时渲染，基于多元模型的交互／模拟，以及增强的图像／视频处理。     

Real-time rendering algorithm based on a hybrid rendering scheme

A real-time rendering algorithm based on a hybrid rendering scheme is presented. The key frames of the virtual scene are generated with a geometry-based approach, then a non-linear transformation to all visible points of each frame near the current viewpoint is performed to reveal their coplanar characteristics and a hierarchical polygon ap-proximation of the local scene is set up. Any intermediate image between the two key frames could be obtained by re-projecting these polygons onto the view plane related to the current viewpoint. The gaps that might appear on the inter-mediate image are filled through bi-directional backward image warping. Experimental results show that our approach is insensitive to the complexity of the scene and has a satisfactory performance.