Black recalculation for arbitrary HSL corrections in CMY color s

Details Black recalculation for arbitrary HSL corrections in CMY color s Black recalculation for arbitrary HSL corrections in CMY color s

1992-11-12

1994-10-25

Coles, Sr., Edward L.

Facsimile and static presentation processing

Natural color facsimile

358529, 358520, H04N 146

Patent

active

053594363

ABSTRACT:
A method for defining a new value of K (black) corresponding with a change in CMY components. Original CMYK printing colors are provided. The original CMY printing colors are corrected to create new CMY printing colors. A value of a smallest one of the original CMY colors is sensed. A value of a smallest one of the new CMY colors is sensed. By use of each of these smallest values, the original K printing color value is modified to create a recalculated K printing color value. The recalculated black value corrects for distortion of original gray balance.

REFERENCES:
patent: 3758707 (1973-09-01), Keller et al.
"Principles of color reproduction applied to photomechanical reproduction, color photography, and the ink, paper, and other related industries", by J. A. C. Yule, John Wiley & Sons, Inc., pp. 282-304.
Pocket Guide to Color Reproduction Communication & Control by Miles Southworth, 1979, pp. 12 and 41-44.
Combi-Chromagraph CT 288 of Dr.-Ing. Rudolf Hell, Jul. 1968, pp. 14 and 52.

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