Apparatus and method for producing color half-tone images

Details Apparatus and method for producing color half-tone images Apparatus and method for producing color half-tone images

1992-11-06

1995-05-16

Coles, Sr., Edward L.

Facsimile and static presentation processing

Natural color facsimile

Image reproduction

358502, 358459, H04N 146

Patent

active

054166128

ABSTRACT:
A method and apparatus for producing a color half-tone image from a digital data file are disclosed. The method includes the step of filling a pattern of dots for each of a plurality of colors, wherein the configuration and size of dots in a macropixel varies as a function of input density for each of the plurality of colors. The step of filling includes the step of producing a plurality of multiple droplet dots in less than the total available pixel locations in a macropixel in at least part of a range of input densities. The apparatus performs the operations of the method. The pixels are of variable size as a function of the number of droplets deposited at the pixel locations.

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Doering et al, "Hardcopy Reproduction of Color Videotex Images by Means of Trilevel Dot Space Modulation and Ink Jet Printing" J. of Imaging Tech. vol. 14, No. 3, Jun. 1988. pp. 73-78.
Fukuda, "Analysis of Superposed Moire Patterns in Halftone Screen", Systems & Computers in Japan, vol. 21, No. 2, 1990, New York, pp. 49-54.

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