“…Surveillance, entertainment and social sciences are examples of fields that can benefit from the development of this area of study. Literature presents different applications of crowd analysis, like counting people in crowds [9,6], group and crowd movement and formation [41,45,38,26] and detection of social groups in crowds [40,39,21,10]. Normally, these approaches are based on personal tracking or optical flow algorithms, and handle with features like walking speed, directions and distances over time.…”