Social pedestrian groups are the basic elements that constitute a crowd; therefore, detection
of such groups is scientifically important for modeling social behavior, as well as practically …

Recently, social theories and empirical observations identified small groups and leaders as
the basic elements which shape a crowd. This leads to an intermediate level of abstraction …

The increasing demand for human activity analysis on surveillance scenarios has been
provoking the emerging of new features and concepts that could help to identify the activities …

Since the number of surveillance cameras in public areas increases very fast, massive
crowd videos are captured and shared, which brings an urgent need to retrieve these videos …

High resolution surveillance systems are essential for security. However, these powerful
tools have been misused by several CCTV operators. The governments and civil society are …

Abstract Multiple Object Tracking (MOT) is a problem in image analysis that involves the
localization and linking of objects in an image sequence over time with numerous …

Recently the traditional video surveillance systems of crowd scenes have been deployed in
various areas of applications; health monitoring, security etc. Monitoring crowds and …

Tracking multiple objects is a challenging task when objects move in groups and occlude
each other. Existing methods have investigated the problems of group division and group …

In large cities with high population densities, the assembly of large crowds in public areas,
such as train stations and shopping malls, causes major concerns on public safety and …

A good solution to human activity recognition enables the creation of a wide variety of useful
applications such as applications in visual surveillance, vision-based Human-Computer …