基于MPEG-4的人脸表情动画

.MPEG-4 Based Face Expression Animation

为了减少人脸表情动画中奇异的变形,提出了一种用人脸表情库来实现人脸表情动画的方法。这种方法利用人脸表情库中模型的先验知识来约束模型变形,有效地防止了奇异变形的产生。该方法首先对照MPEG-4中定义的人脸定义参数(FDP)选取一些特征点,然后根据人脸动画参数(FAP)来计算这些特征点的位移,最后由人脸表情库实时地组合出新的人脸表情。

In order to decrease the non-realistic deformation in face expression animation, a method of using face expression database to realize face expression animation is presented. This method adopts the priori knowledge of models in face expression database to restrict the model deformation, which effectvely prevents non-realistic deformation. According to this method, some feature points are firstly selected from face definition parameters (FDP) in MPEG-4; Then the feature points' displacement is caculated based on face animation parameter(FAP); Finally, expression database composes new face expression.