Color image processing apparatus using a deformed dot matrix

Details Color image processing apparatus using a deformed dot matrix Color image processing apparatus using a deformed dot matrix

1989-05-22

1990-01-30

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 75, 358298, 358459, H04N 140, H04N 146

Patent

active

048977365

ABSTRACT:
A color image processing apparatus avoids uneven recording of date used to form the reproduced color image, which using a reduced memory capacity, by suitable deformation of square dot submatrices within a square dot matrix used in halftone dot reproduction, to provide desired screen angles, and by reproducing different density levels with different arrangements of dots within the same dot pattern.

REFERENCES:
patent: 3742129 (1973-06-01), Roberts et al.
patent: 3922484 (1975-11-01), Keller
patent: 4052715 (1977-10-01), Streifer
patent: 4149194 (1979-04-01), Holladay
patent: 4185304 (1980-01-01), Holladay
patent: 4412225 (1983-10-01), Yoshida et al.
patent: 4486788 (1984-12-01), Yamada
patent: 4752822 (1988-06-01), Kawamura
patent: 4783837 (1988-11-01), Kawamura et al.
P. Stucki, "Electronic Halftoning for Color Reproduction", IBM Technical Disclosure Bulletin, vol. 20, No. 6, Nov. 1977, pp. 2423-2425.

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