Method of producing halftone images

Details Method of producing halftone images Method of producing halftone images

1992-03-04

1993-08-10

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

340793, 358298, 358455, H04N 140

Patent

active

052354350

ABSTRACT:
An improved method is described for producing halftone images with halftone cell dimensions and orientation to match a desired screen grid by choosing reference halftone gray values for each pixel in a supertile of representative halftone cells, testing source pixel gray values against corresponding reference gray values and selectively displaying corresponding pixels, where the supertile includes more than one halftone cell, is composed of whole pixels, can tile the source image plane when placed side-by-side with copies of itself, and includes halftone cells on adjacent supertiles that, in tiling the plane, align exactly or closely to approximate a smooth halftone screen. The invention also includes ways of manipulating the supertile for faster output of a halftone image.

REFERENCES:
patent: 4149194 (1979-04-01), Holladay
patent: 4185304 (1980-01-01), Holladay
patent: 4531160 (1985-07-01), Ehn
patent: 4578713 (1986-03-01), Tsao et al.
patent: 4615013 (1986-09-01), Yan et al.
patent: 4700235 (1987-10-01), Gall
patent: 4758897 (1988-07-01), Hiratsuka et al.
patent: 4823194 (1989-04-01), Mishima et al.
patent: 4897736 (1990-01-01), Sugino
patent: 4903123 (1990-02-01), Kawamura et al.
patent: 4926267 (1990-05-01), Shu et al.
patent: 4930023 (1990-05-01), Yakame
patent: 4972500 (1990-11-01), Ishii et al.
patent: 4977464 (1990-12-01), Ikuta
patent: 4985779 (1991-01-01), Gall

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