text: Well the whole process begins when the computer constructs a 3-D computer model of all faces; all 44 major musals in the model must move like human muscels. Movement of one or more muscels is called an "action unit." Then Dr. Huang relies on the work of psychologist, such as Dr. Paul Eckman, Creator of FACS. Eckman has classifed six basic emotions-happiness, surprise, anger,disgust, fear, and sadness and then associated each with characteristic movements of the facial muscles