text: It help us by recognize the face of our peer, "For instance, you can probably tell how a friend is feeling simply by the look on her face. Of course, most of us would have troubles actually describing each facial triat conveys happy, worries, etc.". Just the computer can know the feeling you feel. if we face with an angry face but meanwhile it showing a happy face to us."They even indicate the difference between a genuine smile and a forces one". By identifity a real smile not a fake one its muscle it go the cheek. A fake smile the mouth its stretched sideway