Patent ID: 10154157

Abstract:
A calibration system includes an image forming apparatus, a color-measurement device, a primary-color-input-output-characteristics adjustment unit, and a secondary-color-input-output-characteristics adjustment unit. The primary-color-input-output-characteristics adjustment unit adjusts input-output characteristics of a primary color of the image forming apparatus by correcting a gamma correction table for the primary color. The secondary-color-input-output-characteristics adjustment unit adjusts input-output characteristics of a secondary color of the image forming apparatus by correcting the gamma correction table for the primary color using the measurement results of the chart for the secondary color. The chart for the secondary color is printed by the image forming apparatus after the adjustment. The secondary-color-input-output-characteristics adjustment unit, as a combination ratio of two color materials, obtains the combination ratio where a hue angle of the specific secondary color becomes a defined hue angle so as to correct the gamma correction table for the primary color corresponding to the obtained combination ratio.