LoD management on animating face models

Presents our work on a level-of-detail (LoD) technique for human-like face models in virtual environments. Conventional LoD techniques have been adapted to allow facial animation on simplified geometric models. This includes the optimization of both geometric and animation parameters. Simplified models are generated in a region-based manner, considering the mobility of each region. The animation process is decomposed into two sub-processes, and each step is optimized. In the MPA (minimum perceptible action) level optimization, a hierarchical structure is devised for the multi-level animation model. The deformation level is simplified by reducing the number of control points. At run-time, the animation level is selected in combination with viewpoint information at the geometric level.