Method for forming color images, using a hue-plus-gray color model and error diffusion

摘要: The invention is for use with a visible medium capable of light reflection etc., and color-image source that defines desired color. Here device causing the to appear colored includes gray-scale subsystem achromatically suppress stated fraction reflection; at least two device-primary subsystems cause selective associated colors. Even if device, as originally made, in effect uses help construct colors, or form "values", such cross-dependency essentially removed. A programmed processor resolves desired-rendition information into Fraction-Black, Fraction-Colorant, hue. Fraction-Black applied exclusively control only subsystem; Fraction-Colorant hue select dominant subordinate primary between them apportion Fraction-Colorant. These parameters are used not color selection but also halftoning, where they enable colorant choice each pixel terms input rather than after resolution pigment terms; this capability prevent artifacts pixels irrelevant