Combining video surveillance with wireless sensor networks brings important advantages in many fields. Resulting video-based wireless sensor networks have a large applicability especially in surveillance of critical zones to detect suspect activities. Beside obvious military applications, a lot of systems were developed for surveillance in subway and train stations, airports, hospitals, parking zones, stores, and other public places (Fernandez, 2013). Along common intrusion detection tasks, these systems can be used also to identify persons, vehicles or other kind of targets.