
People counting systems are the devices that are used to count the number of people traveling a certain entrance or passage. In retail stores, they are usually deployed to calculate conversion rate of the consumer traffic, analyzing marketing effectiveness and are used in resource planning & allocation. The people counting system has implementation both in 2D and 3D technology. The 3D technology drivers are accurately distinguished between people, objects and the background of the space, identify the direction of travel (entering or exiting) and handle high volume traffic and identify and measure groups (for example, families shopping together). People counting system have wide potential applications such as in video surveillance and public resources management. Recently there has been a rise the events, concerts and night clubs. In some countries, their government have rules that specify the maximum capacity of any venue. In such cases a people counting system becomes mandatory for avoidance of breaking the law. There are many night clubs that guaranty security of their clients to make profit, but police department also make sure that the rules are followed especially in places like nightclubs, bars and others. So to dedicate resources and time to make sure the maximum capacity on these locals is never surpassed, in order to avoid dangerous situations people counting systems are adopted.