Method and system for designing multilevel halftone screens...

Details Method and system for designing multilevel halftone screens... Method and system for designing multilevel halftone screens...

2005-06-10

2009-10-06

Haskins, Twyler L (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003140, C358S003030, C358S003130

Reexamination Certificate

active

07599097

ABSTRACT:
A method and system for generating halftone tables, using a spot function, subdivides the pixels within the halftone cell of a halftone matrix into a plurality of sub-pixels, determines the value of the spot function corresponding to the position of each of the sub-pixels within the halftone matrix, repeats the subdividing and determining for all of the sub-pixels in the halftone matrix, ranks the values for the entire halftone matrix, normalizes the ranked values, generates a cumulative histogram based upon the normalized values, and stores the cumulative histogram as a halftone table.

REFERENCES:
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patent: 6757078 (2004-06-01), Bai et al.
patent: 2004/0190092 (2004-09-01), Silverbrook et al.

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