| 摘要 |
An electronic device is connected to a controller. The controller is connected to an infrared light-emitting diode (LED), a camera and one or more infrared illuminators installed in a monitored area. The camera captures images of the monitored area. The electronic device selects a person appears in the images as a tracking target, determines movement information of the tracking target in the monitored area, and controls the camera to track the tracking target according to the movement information. The infrared LED emits infrared rays. The infrared illuminators determine intensity variation of the infrared rays that penetrated the tracking target, generate a pulse signal based on the intensity variation. The electronic device determines if a frequency of a digital signal, which is converted from the pulse signal, falls within a normal human heartbeat rate range, to determine if the tracking target is a suspect.
|
