Patent ID: 6822757
Filing Date: 2004-11-23
Classification: H04N

Abstract:
A color transformation method for transforming device data in a first device space represented by a first color system into device data in a second device space represented by a second color system in which a number of dimensions is different from said first color system, comprising the steps of:determining a first relationship of correspondence from the device data in said first device space to color information of a third color system different from said first and said second color systems and a second relationship of correspondence from the device data in said second device space to the color information of said third color system; constraining any element in the second color system using a predetermined condition and determining an inverse relationship of correspondence from the color information of said third color system to the device data in said second device space on the basis of said second relationship of correspondence; determining a forward relationship of correspondence from the device data in said first device space to the device data in said second device space on the basis of said first relationship of correspondence and said inverse relationship of correspondence; and transforming the device data in said first device space into device data in said second device space by using said forward relationship of correspondence determined.