초록 ▼

A method and apparatus for isochromatic simulation of a multi-colored reproduction on a color monitor. Before simulation, colors are generated on the color monitor and are matched to corner colors of a printed color chart or the like by measuring or visual comparison. The color values required for t

A method and apparatus for isochromatic simulation of a multi-colored reproduction on a color monitor. Before simulation, colors are generated on the color monitor and are matched to corner colors of a printed color chart or the like by measuring or visual comparison. The color values required for the chromatically coinciding generation of the corner colors on the color monitor are measured and allocated to color separation values of the corner colors. The color values required for generating intermediate colors are calculated upon consideration of the printing process of the multi-colored reproduction and are allocated to the corresponding color separation values of the intermediate colors. During the simulation, the color separation values of the multi-colored reproduction are output, modified according to a gradation curve, and transformed into the color values for driving the color monitor in accordance with the previously identified allocations.

대표청구항 ▼

An arrangement for isochromatic simulation of a multi-colored reproduction on a color monitor, comprising: (a) signal source means for outputting color separation values Y,M,C,K of a multi-colored reproduction; (b) transformer stage means connected to said signal source means for transformation of s

An arrangement for isochromatic simulation of a multi-colored reproduction on a color monitor, comprising: (a) signal source means for outputting color separation values Y,M,C,K of a multi-colored reproduction; (b) transformer stage means connected to said signal source means for transformation of said color separation values Y,M,C,K into color monitor video drive values required for the isochromatic simulation; (c) a color monitor means connected to receive said video drive values; (d) said transformer stage means comprising (i) gradation stage means connected to said signal source means for changing the color separation values Y,M,C,K output by said signal source means according to a reproduction gradation curve dependent on the later to occur reproduction process; (ii) an arithmetic stage means for calculation of color value triads r,g,b for a supporting point network of a reproduction color space; (iii) a supporting value memory means connected to said arithmetic stage means for deposit of the calculated color value triads of the supporting point network; (iv) an interpolation stage means communicating with said gradation stage means, arithmetic stage means, and supporting value memory means for interpolation of color value triads r,g,b from color value triads rn,bn, gn of said supporting point network dependent on altered color separation values Y′, M′, C′of the three chromatic color separations of the multi-colored reproduction; (v) logic stage means communicating with said interpolation stage means and gradation stage means for formation of corrected color value triads r′, g′, b′from the color value triads r,g,b and from color separation values K′of a black separation; (vi) linearization stage means connected to said logic stage means for generating linearized color value triads rv, gv, bv from the color value triads r,g,b according to the radiation density characteristics of the color monitor means; and (vii) analog-to-digital converter means communicating with the linearization stage means for generating video drive values r′v, g′v, b′v from the linearized color value triads rv, gv, bv.