Patent ID: 8154777
Filing Date: 2012-04-10
Classification: H04N

Abstract:
1. A color transformation method comprising: in an image processing device with a color correction system comprising memory and a processing component associated with the memory, for each of a plurality of color separations of a digital image: a) establishing a tone reproduction curve in the form of a vector and storing the vector in the memory of the imaging device, the vector being a function of a plurality of basis vectors, which accounts for non-linear interactions between colorants selected from inks and toners, the non-linear interactions comprising interactions between a primary colorant with which the color separation is to be rendered and at least one secondary colorant with which at least a second of the plurality of color separations is to be rendered, the vector including modified input values corresponding to input values for the color separation which vary, depending on the input values of at least the second color separation, wherein the establishing of the vector includes rasterized sampling of an N-dimensional tone reproduction curve where N is the number of the plurality of color separations, each dimension representing a respective one of the color separations; and b) with the processing component of the imaging device associated with the memory, for a pixel of interest in the digital image having a given input value for the color separation and a given input value for at least the second color separation, identifying, from the vector, a modified input value for the color separation for the pixel of interest which corresponds to the input value of the color separation.