Image production using color error diffusion

Details Image production using color error diffusion Image production using color error diffusion

1993-12-08

1997-04-15

Coles, Sr., Edward L.

Facsimile and static presentation processing

Natural color facsimile

Color correction

358534, 358456, 395109, H04N 140, H04N 146, G03F 308

Patent

active

056215452

ABSTRACT:
A color printing system includes a discrete CMY color printer, a LAB color error diffuser, and a LAB/CMY converter. The diffuser includes an image compensator, a vector color space reverter, an error calculator, and an error diffuser. The vector color space reverter provides for error diffusion in a LAB color space that is different from the CMY color space of the printer. The perceptual linearity of the LAB color space provides for enhanced color fidelity in the printed image. In addition, color conversion and error diffusion are performed together, minimizing computational error accumulation and maximizing computational throughput.

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Ulichney, Robert Digital Halftoning, The MIT Press, 1987, pp. 340-342.

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