Methods and systems for providing halftone screens

Details Methods and systems for providing halftone screens Methods and systems for providing halftone screens

2005-10-18

2005-10-18

Lee, Thomas D. (Department: 2624)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003030, C358S001900

Reexamination Certificate

active

06956676

ABSTRACT:
Halftone generating methods and systems convert continuous tone anti-aliased image data to halftone image data using halftoning techniques that efficiently use memory resources. One of a plurality of Holladay counters is selected and the address bits from the selected Holladay counter are output to a look-up table that efficiently stores various halftone screens. Halftone image data is then output. If necessary, the halftone image data is unpacked and replicated as required depending on the resolution requirements of the halftone screen.

REFERENCES:
patent: 4149194 (1979-04-01), Holladay
patent: 4185304 (1980-01-01), Holladay
patent: 5200831 (1993-04-01), Tai
patent: 5410414 (1995-04-01), Curry
patent: 5625460 (1997-04-01), Tai
patent: 5696604 (1997-12-01), Curry
patent: 5701366 (1997-12-01), Ostromoukhov et al.
patent: 5729632 (1998-03-01), Tai
patent: 5745249 (1998-04-01), Crean et al.
patent: 5859955 (1999-01-01), Wang
patent: 6512597 (2003-01-01), Cooper et al.

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