INTRUDING OBJECT DETECTION METHOD AND INTRUDING OBJECT MONITOR APPARATUS AUTOMATICALLY SET THRESHOLD FOR OBJECT DETECTION

摘要

PURPOSE: An intruding object detection method and an intruding object monitor apparatus which automatically set a threshold for object detection are provided to detect an intruding object within a monitoring field of view by applying a subtraction method to an image obtained from an imaging device. CONSTITUTION: A differential image of luminance values between an input image from the imaging device and a reference background image stored in a storage device is generated(112). The differential image is binarized using a predetermined binarization threshold value and the binarization threshold value is changed until a noise level of a binarized image becomes not greater than a predetermined value and based on a binarization threshold value at which the noise level becomes not greater than the predetermined value, an intruding object is detected(113,114).