Patent ID: 8159343

Claim:
An abnormality detecting device detecting an occurrence of an abnormal state in a monitored area based on a video signal in the monitored area comprising: a movement detecting unit detecting a presence of a movement of a body in the monitored area based on the video signal in the monitored area; a body detecting unit detecting an existence of a predetermined body in the monitored area based on the video signal in the monitored area; a brightness level detecting unit detecting a brightness level of the video signal in the monitored area; a determining unit determining whether or not the brightness level detected by the brightness level detecting unit is within a predetermined range; a first abnormality detecting unit, in the case where the brightness level is determined to be within the predetermined range by the determining unit, detecting the occurrence of the abnormal state when a presence of a movement of a body is detected by the movement detecting unit and an existence of the predetermined body is detected by the body detecting unit; and a second abnormality detecting unit, in the case where the brightness level is determined to be outside the predetermined range by the determining unit, detecting the occurrence of the abnormal state when a presence of a movement of a body is detected by the movement detecting unit, and detecting the occurrence of the abnormal state when an existence of the predetermined body is detected by the body detecting unit.