Combined color halftoning

Details Combined color halftoning Combined color halftoning

1997-09-18

1999-10-26

Grant, II, Jerome

Facsimile and static presentation processing

Natural color facsimile

Specific image-processing circuitry

382162, 382166, 358530, G06K 900, H04N 146

Patent

active

059738030

ABSTRACT:
Halftoning algorithms such as error diffusion, blue noise mask, and void and cluster mask are known to produce visually pleasing, random, homogeneously distributed patterns of dots on output devices such as color displays or printers, for example. These algorithms are extended to take advantage of the mechanisms of each that cause a homogeneous distribution of dots of one colorant to produce a substantially homogeneous distribution of dots when using multiple colorants. The number of dots of each colorant are combined to form an output dot level number of dots that is caused to be substantially homogeneously distributed.

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patent: 5493804 (1996-02-01), Harrington
patent: 5509085 (1996-04-01), Kakutani
patent: 5611027 (1997-03-01), Edgar

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