“…The main problems include: high dimensional search space, image noise, the large variability in the appearance of the tracked humans and environment, the complexity of human motion and the fact that particular parts of the body are often obscured. Although these issues can be solved in many different ways, the most common methods use simplified human body models (Deutscher and Reid, 2005;John et al, 2010;Kwolek et al, 2012;Krzeszowski et al, 2016), uniform background (Deutscher and Reid, 2005), and also properly selected clothes of the tracked human body in order to facilitate the determination of distinctive features. In the process of tracking, a particle filter algorithm (Sidenbladh et al, 2000) or its modified versions are frequently used (Deutscher and Reid, 2005).…”