Counters,. namely,. counters that count persons or other objects in a designated area; object detection sensors,. namely,. sensors that detect moving or stationary persons or other objects in a designated area; face image recognizers,. namely, face recognition devices; motion recognition sensors,. namely, sensors that detect movement of objects in terms of size, speed, and color; infrared sensors; digital sensors, namely, sensors that create and save images of objects in a digital form; elect...