Method for making a color transform
AssigneeOce-Technologies B.V.
InventorMaurice L.M. LUTTMER
Life of this patent
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Abstract
A method for making a color transform for an output device is provided. The color transform represents a correspondence relation between a first and a second color space. Each of the two color spaces involves a number of color channels and the color channels of the second color space control the colorants in the output device. An excess relation for the color channels of the color space associated with the output device is established and only color points in the second color space wherefor a sum of the excess values related to the color point is lower than a predetermined limit, are included in the color transform. This enables to adapt the shape of a color gamut to a behaviour of the colorants and enhances the flexibility in making a color transform for various print processes.
Claims9
A method for making a color transform, that represents a correspondence relation between a first and a second color space, each color space comprising color points for defining a color, each color point comprising a number of color channel values, the method comprising the steps of:
- obtaining a set of first color points in the first color space and a set of corresponding second color points in the second color space, wherein a first and a second corresponding color point define a corresponding color;
- establishing an excess relation for relating a color channel value of color points in the second color space to an excess value;
- and
- making the color transform for a gamut of color points in the second color space by relating color points in the first color space to color points in the second color space, wherein a color point is only included in the gamut if a sum of the excess values related to the color channel values of said color point is lower than a predetermined limit.
Dependencies are inferred from the claim text.