视频监控系统由于能对保护目标进行现场实时观察和提供防范信息,又能在事故发生后回放录相提供破案线索,以及它在城镇“天眼”网络防范系统等等领域里的广泛使用,因此其重要性十分突出。然而,目前使用的摄像头在目标亮度较低或在黑暗隐蔽条件下,如地铁或隧道内部、黑夜设伏观察、暗处刑侦取证等使用时会因灵敏度太低而难以奏效。目前国内广为应用发光二极管(LED)、红外光、红外激光对摄象头进行补助照 Video surveillance system can protect the target in real-time observation and provide information on the scene, but also in the event of an accident to provide video clues to solve the case, as well as it in the city “day eye ” network defense system and so on the field of widespread use, So its importance is very prominent. However, the currently used cameras may not work well due to their low sensitivity or their low sensitivity when they are used under the conditions of low target brightness or hidden under dark conditions, such as inside metro or tunnel, dark night observation, dark criminal investigation card and the like. Currently widely used light-emitting diode (LED), infrared light, infrared laser camera to subsidize photos