Patent ID: 6657746
Filing Date: 2003-12-02
Classification: G06K,H04N

Abstract:
A method of constructing a look-up table to be referred to when converting color information of a lattice point in a first color space, into color information of a lattice point in a second color space, comprising the steps of:defining first divided areas by dividing the first color space on the basis of one of color attributes and at least one optionally designated first reference value; defining second divided areas by dividing each of the first divided areas on the basis of one of color attributes and at least one optionally designated second reference value; calculating and providing an appropriate conversion matrix parameter for each of the second divided areas, the appropriate conversion matrix parameter being used to execute conversion from the first color space to the second color space; and constructing, using the provided conversion matrix parameters, a look-up table that indicates a correspondence relationship between lattice points in the first color space and lattice points in the second color space.