Patent Document ID: 20070291312
Application ID: 11820005
Patent Status: 0

Claim One:
1. An apparatus for performing color conversion by referring to a profile defining correspondence relationship between calorimetric values and ink amount data, comprising: a profile memory that stores a plurality of profiles; and a color converter that selects one profile from among the plurality of profiles and converts given calorimetric values into ink amount data by referring to the selected profile, wherein each profile is produced using a plurality of sample ink amount data selected based on evaluation indices including a color difference index and an image quality index, the color difference index represents a color difference between a sample color calculated from a spectral reflectance of a virtual sample patch that has to be printed with an ink amount represented by the sample ink amount data and a comparative color selected as a basis for comparison, and at least one of the image quality indices is a graininess index obtained by applying the sample ink amount data to a graininess profile prepared based on a plurality of correspondence relationships between ink amount data for graininess evaluation and sample graininess indices obtained by actually evaluating a patch for graininess evaluation that is actually printed with the ink amount represented by the ink amount data for graininess evaluation.