A color chart and an illumination unevenness correcting chart are shot by a digital camera 1 under the same illumination, and color data on a first image obtained by shooting the color chart and color data on a second image obtained by shooting the illumination unevenness correcting chart are input to a color processing parameter editing apparatus 2 for generating a color processing condition used in color processing to be performed on an image shot by the digital camera 1. A correcting unit 204 corrects the color data on the first image using the color data on the second image. Target color data corresponding to the corrected color data on the first image is input. A parameter optimizing unit 205 generates a color processing condition for converting the corrected color data on the first image into the target color data.