Scientists from New Zealand have created mats that are able to distinguish between people on the traces left by shoes. When this Mat takes into account not only the sole but also the weight of a person, and weight distribution, says N+1.
Inside the pad, engineers have installed a 15.3-inch rectangular capacitive sensor that can detect objects height up to four inches before him. This property is needed to create a boot scan, when the man comes to the door.
Technology proposed to be used in conjunction with electronic door lock.