Patent ID: 7379204

Claim:
An image processing apparatus for performing color adjustment for image data, comprising: designating means for designating a reference color, an adjusted color of the reference color, and an adjustment region in a color space, wherein the adjustment region has an interior portion and a boundary, wherein the adjustment region is contained within the color space such that the adjustment region is only a part of the color space, and wherein the adjustment region includes the reference color and the adjusted color; region determining means for determining whether a pixel value of input image data is in the adjustment region; adjusted value calculating means for calculating an adjusted pixel value of the image data on the basis of a function of the reference color, the adjusted color and the boundary of the adjustment region, if said region determining means determines that the pixel value of the image data is in the adjustment region, wherein said adjusted value calculating means derives an intersection of a straight line which connects the reference color and the pixel value of the image data and the boundary of the adjustment region, and calculates the adjusted pixel value of the image data on the basis of the adjusted color of the reference color and the intersection; and an output section for outputting the adjusted pixel value.