Patent ID: 6421462
Filing Date: 2002-07-16
Classification: G06K,G06T,G08B

Abstract:
A method for differencing images, said method comprising the steps of:measuring light values by one camera in a scene to generate a first image and a second image; wherein the first and the second image generations are separated in time, separating the first image into first luminance and chrominance components and the second image into second luminance and chrominance components; determining a difference between the first and second luminance components, wherein areas of the scene having a substantial difference define a luminance mask; determining a difference between the first and second chrominance components, wherein areas of the scene having a substantial difference define a chrominance mask; and combining into a single mask the luminance mask and chrominance mask to determine a difference between the first and second images, and wherein the single mask defines areas of the scene occupied by an object to be identified.