Patent ID: 7420705

Claim:
An image processing apparatus comprising: storing means that stores data of an input color group including at least one color, data of a corresponding color group made up of colors obtained by allowing an image output apparatus to output the colors of the input color group, the colors of the corresponding color group having a preset relationship with the colors of the input color group, and data of an acceptable range of the corresponding color group which is provided according to type of paper sheet used by the image output apparatus; setting means for setting a type of paper sheet used by the image output apparatus; inputting means for inputting, from outside said image processing apparatus, data indicating a color group obtained by allowing the image output apparatus to print the input color group on paper sheet of the type set by said setting means and then measuring colors on the printed paper sheet; calculating means for calculating a lightness error, chroma error and hue error using the input data inputted by said inputting means, the data of the corresponding color group stored in said storing means, and the data of the acceptable range corresponding to the type set by said setting means stored in said storing means, and further calculating a color reproduction index for color matching using these errors; profile storing means for storing profiles of devices including said image output apparatus; and notifying means for deciding whether a profile of any one of the devices stored in said profile storing means will be updated or not based on the color reproduction index, and notifying a user of the decision result.