Patent ID: 6757429
Filing Date: 2004-06-29
Classification: G06T

Abstract:
A sequence of subsampling representations of decreasing length for compressing a digital representation of an image, the digital representation comprising a two-dimensional array of pixels wherein a primary color component and secondary color components are associated with each pixel, the sequence comprising:a first subsampling representation wherein all color components are present at each pixel; a second subsampling representation wherein the primary color component and one secondary color component are present at each pixel; a third subsampling representation wherein a primary color component is present at each pixel and quadruple as many primary color components as each secondary color components are present; a fourth subsampling representation derived from the first subsampling representation by reducing the number of pixels in the horizontal direction and in the vertical direction by dividing each dimension of the two-dimensional array by an integral factor; a fifth subsampling representation derived from the fourth subsampling representation wherein the primary color component and one secondary color component are present at each pixel; and a sixth subsampling representation derived from the fourth subsampling representation wherein a primary color component is present at each pixel and quadruple as many primary color components as each secondary color component are present.