Color conversion definition correcting method, color conversion definition correcting apparatus, and color conversion definition correcting program storage medium

A color conversion definition correcting apparatus for correcting a color conversion definition consisting of a combination of a target profile representative of an association between coordinates on a target color space depending on a target device for outputting an image based on image data and coordinates on a calorimetric color space of a device non-dependence with an output profile representative of an association between coordinates on an output device color space depending on an output device for outputting an image based on image data and coordinates on the calorimetric color space, said color conversion definition correcting apparatus comprising:

• a target profile correcting section for applying to said target profile such a correction that coordinate values out of a color gamut for said output device in the colorimetric color space, of coordinate values in a color gamut for said target device in the calorimetric color space, all go in the color gamut for said output device;
• a first calorimetric data obtaining section for measuring color patches of a color chart outputted from said target device in accordance with first chart data representative of a color chart in which a plurality of color patches is arranged to obtain first calorimetric data defined by the coordinates on said calorimetric color space;
• a second calorimetric data obtaining section for measuring color patches of a color chart outputted from said output device in accordance with second chart data in which the first chart data is converted in accordance with said color conversion definition to obtain second calorimetric data defined by the coordinates on said calorimetric color space;
• a calorimetric data correcting section for applying same correction as the correction in said target profile correcting section to the first calorimetric data obtained in said first calorimetric data obtaining section;
• and
• a definition correcting section for further correcting the color conversion definition in which the target profile is corrected in said target profile correcting section, in accordance with the first calorimetric data corrected in said calorimetric data correcting section and the second calorimetric data obtained in said second calorimetric data obtaining section.

A color conversion definition correcting program storage medium storing a color conversion definition correcting program which causes a computer to operate as a color conversion definition correcting apparatus, when said color conversion definition correcting program is incorporated into the computer and executed, said color conversion definition correcting program correcting a color conversion definition consisting of a combination of a target profile representative of an association between coordinates on a target color space depending on a target device for outputting an image based on image data and coordinates on a calorimetric color space of a device non-dependence with an output profile representative of an association between coordinates on an output device color space depending on an output device for outputting an image based on image data and coordinates on the calorimetric color space, and said color conversion definition correcting program comprising:

• a target profile correcting section for applying to said target profile such a correction that coordinate values out of a color gamut for said output device in the calorimetric color space, of coordinate values in a color gamut for said target device in the calorimetric color space, all go in the color gamut for said output device;
• a first calorimetric data obtaining section for measuring color patches of a color chart outputted from said target device in accordance with first chart data representative of a color chart in which a plurality of color patches is arranged to obtain first calorimetric data defined by the coordinates on said colorimetric color space;
• a second calorimetric data obtaining section for measuring color patches of a color chart outputted from said output device in accordance with second chart data in which the first chart data is converted in accordance with said color conversion definition to obtain second calorimetric data defined by the coordinates on said calorimetric color space;
• a calorimetric data correcting section for applying same correction as the correction in said target profile correcting section to the first calorimetric data obtained in said first calorimetric data obtaining section;
• and
• a definition correcting section for further correcting the color conversion definition in which the target profile is corrected in said target profile correcting section, in accordance with the first calorimetric data corrected in said calorimetric data correcting section and the second calorimetric data obtained in said second calorimetric data obtaining section.