Mask producing method, image outputting device and computer...

Details Mask producing method, image outputting device and computer... Mask producing method, image outputting device and computer...

2006-09-05

2006-09-05

Rogers, Scott A. (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003140, C358S003180, C358S003220, C358S003260, C358S533000, C358S535000

Reexamination Certificate

active

07102791

ABSTRACT:
A mask is produced for converting multi-level image data into a halftone image through comparison with a threshold for each pixel. For this purpose, a dot pattern is determined on each of predetermined gray scale levels, and, the mask is created by the dot patterns obtained at the step, where the respective dot patterns are determined independently for every gray scale level.

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Robert Ulichney, “The Void-and-Cluster Method for Dither Array Generation”; SPIE vol. 1913, pp. 332-343.

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