Halftone super-cell optimization for artifact reduction

Details Halftone super-cell optimization for artifact reduction Halftone super-cell optimization for artifact reduction

2007-09-04

2007-09-04

Lee, Thomas D. (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003070, C358S003160, C358S003190, C358S003260

Reexamination Certificate

active

10619385

ABSTRACT:
Artifact reduction is achieved by altering the growth of sub-cells for each super-cell in either a pre-determined or random manner. The means of alteration is selected such that the sum of all the groups equals a halftone value. In another embodiment, the random group is selected by using predetermined patterns which are different among sub-cells, such as different means of constructing a dot. Preferably a different pattern is used in adjacent super-cells. In yet another embodiment, the method selects sub-cells patterns that are not aligned on the super-cell boundaries.

REFERENCES:
patent: 5121198 (1992-06-01), Maronian
patent: 5815286 (1998-09-01), Matsuba et al.
patent: 6377330 (2002-04-01), Vanderbrook et al.
patent: 1 199 881 (2002-04-01), None

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