Patent ID: 8675255
Filing Date: 2014-03-18
Classification: G06F,H04N

Abstract:
1. A profile creation method according to which a profile of defining an ink amount is created by determining an ink amount for reproducing a hue value indicated by a lattice point in a device-independent color system, the method comprising: firstly obtaining for each kind of chromatic ink in a plurality of chromatic inks a first chromaticity feature representing a variation in a chromaticity on a first print medium corresponding to a variation in an ink amount up to a limit value of an ink amount which can adhere to the first print medium; secondly obtaining for each kind of chromatic ink in the plurality of chromatic inks a second chromaticity feature representing a variation in chromaticity on a second print medium, which is different from the first print medium, corresponding to a variation in an ink amount up to a limit value of an ink amount which can adhere to the second print medium; determining a new limit value of the ink amount based on the second chromaticity feature after approximation for each kind of chromatic ink in the plurality of chromatic inks by correcting and approximating the second chromaticity feature to the first chromaticity feature for each kind of chromatic ink; determining an ink amount which is equal to or less than the determined new limit value to execute optimization when the ink amount for reproducing the hue value indicated by the lattice point is determined by the ink amount optimization with the use of an object function for evaluating image quality when a designated amount of ink is made to adhere to the first print medium; and creating a profile for the second print medium, for which the converted ink amount has been defined, by converting the ink amount determined by the optimization with a conversion relationship based on the first chromaticity feature and the second chromaticity feature for each kind of chromatic ink in the plurality of chromatic inks.