Method of non-overlapping additive color printing

Details Method of non-overlapping additive color printing Method of non-overlapping additive color printing

1995-11-30

1997-09-23

Vu, Kim

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358501, 358515, 358518, 395109, 348577, G06F 1500, H04N 146, H04N 514, G03F 308

Patent

active

056713401

ABSTRACT:
A multicolor printing method employing a color printer capable of printing non-overlapping red, green, blue and black colorants, includes the steps of: providing a digital color image having n-bit/color pixels; dividing the digital image into a plurality of pixel blocks; identifying pure red, green, blue, black and white pixels in each block and assigning such pixels to be printed with the corresponding colorant or white (no colorant); calculating percent red, green, blue, black and white for remaining pixels in each block; using the calculated percentages, assigning remaining pixels in each block to be printed with pure colorant or white according to a predetermined filling procedure; and printing the image using the assigned colorants.

REFERENCES:
patent: 4809063 (1989-02-01), Moriguchi et al.
patent: 4893177 (1990-01-01), Tada et al.
patent: 4959790 (1990-09-01), Morsan
patent: 4974067 (1990-11-01), Suzuki et al.
patent: 5010814 (1991-04-01), Shishikura
patent: 5206918 (1993-04-01), Levene
patent: 5416612 (1995-05-01), Ingraham et al.

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