Patent ID: 6661925
Filing Date: 2003-12-09
Classification: H04N

Abstract:
A method of compressing image data comprising the steps of:a) Providing data representing a set of individual images, said set of images having a correlation greater than 0.5; b) Applying a wavelet transform to a reference image of said set to determine a series of coefficients wi(1) related to said reference image, wherein said reference image may be any image in said set; c) Applying a wavelet transform to remaining images of said set to determine a series of coefficients wi(k) for k>1 related to said remaining images; d) Comparing the series of coefficients wi(kâˆ’1) and wi(k), for k>1 to determine a further coefficient, ci(k), such that wi(k) is determined from the relationship: wi(k)=&boxur;b(k)wi(kâˆ’1)&boxul;+c(i(k), e) Entropy encoding said coefficients wi(1), ci(k) for k>1 and thereby forming a compressed set of image data.