 Many different technologies are used in people counting devices, such as smart-flooring technologies, infrared beams, thermal imaging, computer vision, and WiFi counting.The current fourth generation of people counter utilize stereoscopic imaging to overcome the limitations imposed by previous generations such as shadow issues, high traffic counting, and disruption of patterns on the floor.Computer vision works via an embedded device, reducing the network bandwidth usage, as only the number of people must be sent over the network.