In the interior zones of a shop, where the products are exposed,
it is possible that malicious clients can commit a theft. In these situations, the shopping mall owners want to protect specific zones,
specially where the more expensive articles are located.
Attending to this, our system gives off alarms when a person has
a suspicious behavior of loitering around a specific zone of the
shop. As stated in Candamo, Shreve, Goldgof, Sapper, and Kasturi
(2010), loitering is defined as the presence of an individual in an
area for a period of time longer than a given time threshold.