An LUT1 preparation section 1 and an LUT2 preparation section 2 prepare an LUT1 and an LUT2 for producing linear output from first raw data or second raw data. Using the LUT1 and LUT2, an LUT1 conversion section 3 and an LUT2 inverse conversion section 4 convert CMYK of the first raw data and C'M'Y'K' of the second raw data into four color values adjusted, and an L matching LUT preparation section 5 prepares an L matching LUT so that the K value of the four color values adjusted becomes equal. A K preservation 4DLUT preparation section 6 prepares a K preservation 4DLUT from the four color values adjusted, the L matching LUT, and the Lab value of the first and second raw data. A 4DLUT reset section 7 resets some of data in the prepared K preservation 4DLUT, whereby partial calorimetric match is intended.