A process is provided for developing and converting a lookup table composed of only characteristic points of the characteristic of a color device and having a volume smaller than that of a multidimensional LUT into a multidimensional LUT by a table development process. The rack piston is two separate components. The output-information creating unit creates a second image based on a shape of the first image stored by the image memory. A polymethane gel may be disposed in a recess of the base frame.