Method of creating and applying half tone screen patterns

Details Method of creating and applying half tone screen patterns Method of creating and applying half tone screen patterns

1990-02-09

1993-02-16

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358459, 358465, H04N 140

Patent

active

051875942

ABSTRACT:
A technique for creating and applying half tone screen patterns by computer, consisting of a screen generator and a screen applicator. The screen generator accepts a set of parameters specifying the angle and frequency of the desired screen, the output printing device resolution, and parameter tolerances. It then produces a half tone screen pattern file according to the specified parameters, as a set of repeat arrays for each desired gray level. The screen applicator accepts an input contone image representation such as is produced by a scanner or other device, and the half tone screen pattern file produced by the screen generator. It then interpolates between the pixel values, at the output device resolution, by examining the repeat arrays for each device cell. In this way, a representation of a half tone screening of the input contone image results where the output device resolution is fully exploited.

REFERENCES:
patent: 4075663 (1978-02-01), Wellendorf
patent: 4231069 (1980-10-01), Wellendorf et al.
patent: 4236174 (1980-11-01), Gall
patent: 4393399 (1983-07-01), Gast et al.
patent: 4413286 (1983-11-01), Boston
patent: 4419690 (1983-12-01), Hammes
patent: 4486788 (1984-12-01), Yamada
patent: 4499489 (1985-02-01), Gall et al.
patent: 4506301 (1985-03-01), Kingsley et al.
patent: 4516155 (1985-05-01), Hennig et al.
patent: 4554594 (1985-11-01), Ciardiello et al.
patent: 4618523 (1986-10-01), Yoshida
patent: 4635131 (1987-01-01), Terada et al.
patent: 4661859 (1987-04-01), Mailloux et al.
patent: 4686579 (1987-08-01), Sakamoto
patent: 4701401 (1987-10-01), Leenders et al.
patent: 4706206 (1987-11-01), Benoit et al.
patent: 4710444 (1987-12-01), Leenders et al.
patent: 4730221 (1988-03-01), Roetling
patent: 4758886 (1988-07-01), Rylander
patent: 4933775 (1990-06-01), Shimura

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