Facial expression recognition is used to recognize a number of human facial expressions. Face expression recognition application identifies the facial expressions based on the variations in the pigmentation of a human face. With the help of facial expression recognition, every expression of different feature points such as, eyes, nose, ear, mouth, cheeks, chin, etc. of the human face can be captured and recognized.
Many advanced face recognition devices also have face expression recognition feature enabled. The methodology of face expression recognition technology is a little different from that of face recognition technology as it scans the face in three phases to give the precise information of the feature points of the face.