Method and apparatus for rendering a continuous tone image...

Details Method and apparatus for rendering a continuous tone image... Method and apparatus for rendering a continuous tone image...

2005-03-22

2005-03-22

Grant II, Jerome (Department: 2626)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003060, C382S237000

Reexamination Certificate

active

06870640

ABSTRACT:
A system for rendering an image representation is disclosed. The system includes a halftone processor; a printer interfaced to the halftone processor; and a software routine operative on the halftone processor for a) classifying an input pixel value in either a first classification or a second classification, b) determining an output pixel value by error diffusing the input pixel value when the input pixel value is classified in the first classification, c) determining a temporary output pixel value by stochastic screening the input pixel value when the input pixel value is classified in the second classification, d) determining an adjusted input pixel value based on the input pixel value, the temporary output pixel value and a weighting value, e) determining the output pixel value by error diffusing the adjusted input pixel value, and f) rendering the output pixel value in the printer.

REFERENCES:
patent: 5673121 (1997-09-01), Wang
patent: 5805734 (1998-09-01), Ebner
patent: 5835687 (1998-11-01), Brown et al.
patent: 6026199 (2000-02-01), Sommer
patent: 6363177 (2002-03-01), Loce et al.
patent: 6694041 (2004-02-01), Brunk

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