Patent ID: 7408677
Filing Date: 2008-08-05
Classification: H04N

Abstract:
1. A profile creation method of creating a profile to define correspondence between a first color space range expressed by a device-dependent component coordinate and a second color space range expressed by a device-independent component coordinate corresponding to said first color space range, said method comprising: a first gamut acquisition step of acquiring a first gamut for said first color space range based on a chart supplied from a specified input device; a second gamut acquisition step of measuring a color in said chart and acquiring a second gamut for said second color space range; a first reduced region acquisition step of acquiring a reduced first color space range by reducing said first color space range into said first gamut and acquiring a reduced first gamut by reducing said first gamut based on a corresponding reduction ratio; a second reduced region acquisition step of acquiring a reduced second color space range and a reduced second gamut corresponding to said reduced first color space range and said reduced first gamut based on a specified interpolation algorithm; a magnification ratio calculation step of calculating a first magnification ratio corresponding to said second gamut for each grid in said acquired reduced second gamut and calculating a second magnification ratio from a reduced second color space range to a second color space range based on said calculated first magnification ratio; and a profile creation step of calculating a second color space range based on said calculated second magnification ratio and creating a profile defining correspondence between said first color space range and said second color space range based on a calculation result.