text: Dr. Huang, says in paragraph four, "The facial expressions for each emotion are universal." He says, " even though individuals often show varying degrees of expression." Using video imagery, the emotion-recongnition software tracks these facial movements on a real face or even a picture. The author uses an example of the Mona Lisa painting by Leonardo da Vinci. They used the emotion-recongnition on the painting and it showed how Mona Lisa was feeling. It not only looks at how your smiling or how your eye are placed, it also looks at the structure of ur face and how your muscles move.