Patent ID: 7595919
Filing Date: 2009-09-29
Classification: H04N

Abstract:
1. A color conversion definition creating method of creating a color conversion definition for converting coordinate points in a color reproduction area of a first device that mediates between an image and image data, in a first RGB color space, which depends on the first device, into coordinate points in a color reproduction area of a print in a CMYK color space for printing, the color conversion definition creating method comprising: a profile creating process of creating a virtual device profile between a predetermined common color space and a second RGB color space depending on a virtual second device that mediates an image and image data, the virtual device profile having a color reproduction area tracing the color reproduction area for printing; reading a device profile of the first device from memory; a first color conversion definition creating process of creating a first color conversion definition for converting coordinate points in the color reproduction area of the first device in the first RGB color space into coordinate points in the color reproduction area of the second device in the second RGB color space, using the device profile of the first device and the virtual device profile created in the profile creating process; and a second color conversion definition creating process of creating a second color conversion definition for converting coordinate points in the color reproduction area of the second device in the second RGB color space into coordinate points in the color reproduction area for printing in the CMYK color space, wherein the profile creating process comprises a color reproduction area definition process in which the color reproduction area of the second device is defined in such a manner that vertexes of W, C, M, Y, R, G, B of the color reproduction area of the second device are coincident with vertexes of associated W, C, M, Y, R, G, B of the color reproduction area for printing, respectively, and edge lines for connecting the vertexes of W, C, M, Y, R, G, B of the color reproduction area of the second device with one another are coincident with the associated edge lines of the color reproduction area for printing, respectively, and with respect to the vertex of K of the color reproduction area of the device, the vertex of K is coincident with points (C, M, Y, K)=(100, 100, 100, K