Patent ID: 7382898
Filing Date: 2008-06-03
Classification: G06K,G08B

Abstract:
1. A method for detecting an object left in a field of view, comprising: constructing a long-term representation of said field of view; constructing a short-term representation of said field of view that is shorter in duration than said long-term representation; calculating a difference between said long-term representation and said short-term representation; and classifying said difference as said left object, said classifying being performed in accordance with at least one predefined criterion, said at least one predefined criterion comprising a constancy in appearance of said difference, wherein at least one of said long-term representation and said short-term representation is constructed according to a method based on, for each pixel in each frame of a sequence of frames of a desired representation of the field of view, modeling a histogram representation of intensity variations of said pixel over said sequence.