Halftoner block employing average values and shifts

Details Halftoner block employing average values and shifts Halftoner block employing average values and shifts

2011-08-09

2011-08-09

Lee, Thomas D (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S001900, C358S003030

Reexamination Certificate

active

07995244

ABSTRACT:
Halftoning apparatus and method that may generate and employ average values and shifts are described herein. The apparatus may include an unpacker to determine shifts and average values for a plurality of input pixel values, each pair of average value and shift being associated with a corresponding pair of the input pixel values. The apparatus may further include a halftone core coupled to the unpacker to receive the shifts and the average values from the unpacker and to generate pairs of output pixel values based at least in part on the received shifts and average values, wherein the output pixel values are for generating pixels of an image.

REFERENCES:
patent: 5602653 (1997-02-01), Curry
patent: 7031025 (2006-04-01), He et al.
patent: 7164502 (2007-01-01), Nose et al.

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