A 3-D computer is a model of the face all 44 muscles and it's called an "action unit". The Dr. Huang relies to work on of psychologists and Dr. Paul ECAM, the created of FACS (Facial Action Coding System). Dr. Beckman classified six basic emotions surprise, anger, happiness, fear, and sadness. Then he made associated each with characteristic movements of the facial muscles.

Dr. Huang smiling broadly" even though individuals often show varying degrees of expression". Huang using video imagery, new emotion-recognition software tracks these movements in a real face or the painted picture of Mona Lisa. The weighting the different units in the software can be even identify mixed emotions. Even each expression can be compared against the neutral face.

The humans perform the same impressive "calculation" every single day. If we can probably tell our friend how they're feeling because by the way look on their faces. But most of us would have trouble describing each facial.