Color error diffusion with error signal offset

Details Color error diffusion with error signal offset Color error diffusion with error signal offset

2011-07-19

2011-07-19

Williams, Kimberly A (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003050, C358S534000, C382S162000, C382S252000

Reexamination Certificate

active

07982916

ABSTRACT:
A method for multi-toning an input digital image having input pixels with two or more color channels to form an output digital image having modified output levels. The method includes determining modified output levels using a combined error signal formed from intermediate error signals for each color channel together with an error signal offset value, and adjusting the input levels for the nearby pixels responsive to weighted error signals.

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“Digital Color Halftoning” by Henry R. Kang, SPIE Optical Engineering Press, 1999, Chapter 16.

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