Facsimile and static presentation processing – Natural color facsimile – Image reproduction
Patent
1994-11-14
1996-07-16
Coles, Sr., Edward L.
Facsimile and static presentation processing
Natural color facsimile
Image reproduction
358505, 358520, 358534, H04N 146, G03F 308
Patent
active
055372287
ABSTRACT:
The invention is for use with a visible medium capable of light reflection etc., and for use with a color-image source that defines a desired color. Here a device for causing the medium to appear colored includes a gray-scale subsystem to achromatically suppress a stated fraction of the reflection; and at least two device-primary subsystems to cause selective reflection of light of two associated device-primary colors. Even if the device, as originally made, in effect uses the gray-scale subsystem to help construct colors, or the device-primary subsystems to help form gray-scale "values", such cross-dependency is essentially removed. A programmed processor resolves the desired-rendition information into Fraction-Black, Fraction-Colorant, and hue. Fraction-Black information is applied exclusively to control only the gray-scale subsystem; Fraction-Colorant to control only the device-primary subsystem; and hue to select a dominant and a subordinate primary subsystem and as between them apportion the Fraction-Colorant.
REFERENCES:
patent: 4468692 (1984-08-01), Yamada et al.
patent: 4500919 (1985-02-01), Schreiber
Coles Sr. Edward L.
Hewlett-Packard
Nguyen Madeleine Au
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