Emotion is a strong feeling deriving from one's circumstances, mood, or relationship with others. It tells us about one’s social behaviour and presence of mind. Social etiquettes play a major role in one’s personality.
A growing number of applications rely on the ability to extract information about people from real time input through the camera. Examples are the person identification for surveillance or access control the estimation of gender and age that have been addressed in isolation in the past, there often exists a variety of methods for each.