FACS Explained

FACS stands for Facial Action Coding System and is a way to describe a person’s facial expression in terms of muscle contraction and relaxation. A single muscle group is called an Action Unit (AU) and either has a value between 0-5 or 0-1 (FACSvatar). It is a system found by Paul Ekman and is often used in affective research. Since FACS describes facial configurations, it is not only useful for affective analysis, but also for animation. More information about FACS can be found here: https://en.wikipedia.org/wiki/Facial_Action_Coding_System

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