Stochastic halftone screening method

Details Stochastic halftone screening method Stochastic halftone screening method

2007-08-28

2007-08-28

Moe, Aung S. (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S001900, C358S003060, C358S302000, C358S535000, C362S257000

Reexamination Certificate

active

09888668

ABSTRACT:
A method for halftoning a gray scale image to generate a halftoned image uses a stochastic screen is designed to provide visually pleasing, blue noise dot profiles when thresholded at any gray level and wherein substantially all the threshold values corresponding to gray levels between gs1and gs2coincide with black positions in a constraining checkerboard pattern and substantially all the threshold values corresponding to gray levels between gs2and gs3coincide with white positions in the constraining checkerboard pattern.

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Meng Yao and Kevin J. Parker, “Modified Approach to the Construction of a Blue Noise Mask”, Journal of Electronic Imaging, Jan. 1994, vol. 3(1), pp. 92-97.

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