Patent ID: 8400677

Claim:
An image processing apparatus comprising: a color conversion unit that color-converts an image signal of a first color space into an image signal of a second color space by using a color conversion characteristic defining a correspondence relationship between the image signal of the first color space and the image signal of the second color space; an adjustment unit that adjusts the image signal of the second color space, which is color-converted by the color conversion unit, by using adjustment conversion factor groups, the adjustment conversion factor groups being for adjusting the image signal of the second color space in accordance with a change in the color conversion characteristic, and being set for respective types of sheets on which an image is to be printed on the basis of the image signal of the second color space; a calculation unit that calculates the adjustment conversion factor groups set in the adjustment unit; a memory that stores an associating factor group associating, with each other, the adjustment conversion factor groups of the respective types of sheets set in the adjustment unit; and an update unit that updates the adjustment conversion factor groups of the respective types of sheets set in the adjustment unit, on the basis of one of the adjustment conversion factor groups of one sheet calculated by the calculation unit and the associating factor group stored in the memory, wherein when the update unit updates a first one of the adjustment conversion factor groups of a first one of the sheets for which the associating factor group is not stored in the memory, the calculation unit calculates the first one of the adjustment conversion factor groups of the first one of the sheets and also calculates a second one of the adjustment conversion factor groups of a second one of the sheets for which the associating factor group is stored in the memory, and the image processing apparatus further comprises an associating-factor-group calculation unit that calculates the associating factor group associating, with each other, the first one of the adjustment conversion factor groups and the second one of the adjustment conversion factor groups, on the basis of the first one of the adjustment conversion factor groups and the second one of the adjustment conversion factor groups that are calculated by the calculation unit, and that stores, in the memory, the associating factor group thus calculated.