Patent ID: 6819353
Filing Date: 2004-11-16
Classification: G06K,G06T,G08B,H04N

Abstract:
A method for monitoring a monitored area comprising:recording an image of the monitored area; comparing the recorded image with a reference image in order to determine whether there is an alarm situation, wherein the reference image is created by combining at least two previously stored images from a set of images, so that the lighting conditions in the reference image are adjusted to the lighting conditions in the recorded image; calculating a difference image as the difference between the reference image and the recorded image; determining at least one divergence area in the difference image, in which at least certain pixels exceed a particular level; determining whether the divergence area represents a scene change; and if the divergence area represents a scene change, removing the pixels that correspond to the divergence area in the recorded image for the creation of the next reference image.