Patent ID: 7239425

Claim:
An image processing method for generating a conversion condition for converting input color data in a device independent color space into output color data in a device dependent color space, comprising the steps of: inputting measurement data, indicated in the device independent color space, of a color patch output by an output device; converting the input color data indicated in the device independent color space into color data indicated by a first plurality of color components, the first plurality of color components consisting of three color components none of which is a black component, on the basis of the measurement data; setting a condition for restricting an amount of recording material; computing color data indicated by a second plurality of color components at each vertex of a solid defining a color reproducible by the output device on a three-dimensional color space, based on the set condition, wherein the second plurality of color components includes plural color components, one of which is a black component; and interpolating the output color data, indicated by the second plurality of color components, corresponding to the converted input color data, from the computed color data at at least one of the vertices.