Systems, methods, and programs for converting externally defined four-dimensional pigments into equivalent four-dimensional pigments defined by four inks associated with the printer

摘要

The system, method and program of the present invention have the same color value (e.g., L^*a^*b^*Value) determines the only combination of four dyes of a given printer (C'M'Y'K ') that is equivalent to an externally defined four dye combination (CMYK). L associated with each three element combination (CMY) with a fourth element value (K) equal to 0, the value of the externally defined four dye combination (CMYK)^*a^*b^*The value is used in an inverse transformation / interpolation program. The printer also prints a matrix of predetermined variable combinations (CMY) p of the three dyes of the printer where the fourth dye K is zero. L for each printed patch^*a^*b^*The value is measured. Three dye combination values corresponding to this value are input to the inverse transform / interpolation program. Any given three dye combinations (CMY) or L defined externally^*a^*b^*For values, L^*a^*b^*By matching the values, the corresponding three dye combinations C'M'Y 'of the printer can be determined from the inverse transform / interpolation program. Next, the fourth dye of the four externally defined combinations of dyes, eg black (K), is the color value (eg L^*) Is mapped to the fourth equivalent dye (K ') of the printer. For example, L for various percentages of the fourth dye through the standard table when C = 0, M = 0, Y = 0^*The value is found. Print the changing percentage of the fourth element and its L^*a^*b^*Measure the value a^*Wowb^*Let L be almost 0^*By using the value, L for various percentages of the fourth dye in the printer^*The value is found. As such, the transformation occurs in two steps: C'M'Y 'in CMY and K' in K '. When the two steps are combined, the CMYK is converted to C'M'Y'K '. Therefore, a unique solution is obtained using a three-dimensional transformation and a separate one-dimensional transformation.