Adaptable color density management system

Details Adaptable color density management system Adaptable color density management system

1996-06-27

1999-04-13

Lee, Thomas D.

Facsimile and static presentation processing

Natural color facsimile

Black signal synthesis

358515, 358518, G03F 308

Patent

active

058943587

ABSTRACT:
A method and system for determining an equal amount of a plurality of color densities to be removed in rendering a multicolor image using a black toner and the plurality of colored toners. The rendering of the multicolor image is executed with a multicolored digital inputs according to undercolor removal techniques. The includes providing a black toner coverage bit count and a total colored toner coverage bit from a plurality of colored toners (often cyan, magenta and yellow) to be used in rendering the multicolored image. The black toner and colored toner coverage estimations are summed; if this sum exceeds a predetermined maximum total toner density level, an equal amount R of toner to be removed from each colored toner separation is determined by subtracting the predetermined maximum from the sum of the black and colored toner estimations, and then dividing the result by the number of colored toner used to produce gray (again, usually 3-cyan, magenta and yellow).

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Publication entitled "Reducing Ink Coverage Levels in Binary CMYK Images" by R. Victor Klassen. IS&T's 46th Annual Conference (1993) p. 173.

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