Patent ID: 7548644

Claim:
A digital image processing apparatus for applying pixel-based color correction to an input image to generate an output image, said apparatus comprising: a color correction module configured to apply varying degrees of color correction and to provide two or more color correction processes each having a respective associated locus in a color space and a respective associated color mapping operation; said two or more color correction processes being sequential so that results of a color correction process form an input to a next such process in said sequence; each of said two or more color correction processes detects whether each pixel lies within said respective locus in color space and, if so, applies said color mapping operation to the pixel, wherein once a first color correction process is performed on a particular pixel, each additional color correction process of said two or more color correction processes with respect to the particular pixel is limited to an extent dependent on a degree by which previous color correction processes in the sequence were applied thereby inhibiting color mapping in respect of loci associated with the previous color correction processes in the sequence.