Realistic Crying Simulation of 3D virtual human: A survey

Recent advancements in technology, PC facial animation is utilized in a critically large number of fields that carried human and social to contemplate PC games, films, and intuitive sight and sound reality development. this study aims to pro-vide a survey of efficient computer facial animation techniques. The proposed approach consists of two basic techniques for the generation of extreme 3D facial animation expression; facial expressions were created and described using FACS. This system disintegrates facial expressions into minor units referred to as Action Units (AUs). The generation of the emotional facial expressions relied on the combination of the independent AUs. Then, crying teardrops were created following the rules of physics by using the SPH method. The SPH rule was used to simulate and control the particles in the tears drop. Expressions such as happiness and sadness were created with FACS, followed by the addition of the tears based on the SPH rules. This provides the avatar tears that portrayed the desired expression. The study succeeded in combining the FACS & SPH approaches in creating a system that can express and implement extreme facial animation expressions. there are still areas that need to be furthered, such as modeling of muscle movement in certain expressions like crying.