Image subtraction
OwnerPaul Bromiley, Neil Thackerinventors
Life of this patent
Estimating the term…
Abstract
A method of generating a difference image base upon a comparison of two input images, the method comprising generating a scattergram representing correspondence between intensity values of areas in the first image and intensity values of areas in the second image, and using characteristics of the scattergram to generate a difference image in which the effect of a global change between the first and second input images is reduced.
Claims22
A method of generating a difference image based upon a comparison of two input images, the method comprising generating a scattergram representing correspondence between intensity values of areas in the first image and intensity values of areas in the second image, and using characteristics of the scattergram to generate a difference image in which the effect of a global change between the first and second input images is reduced.
A method according to any preceding claim, wherein the areas are pixels
A method according to any preceding claim, wherein the intensity values are grey level values.
A method according to any preceding claim, wherein the scattergram is smoothed.
A method substantially as hereinbefore described with reference to the accompanying figures.
Dependencies are inferred from the claim text.