Digital halftoning with correlated minimum visual modulation pat

Details Digital halftoning with correlated minimum visual modulation pat Digital halftoning with correlated minimum visual modulation pat

1990-05-29

1993-05-25

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358429, 358463, 358448, H04N 140

Patent

active

052145174

ABSTRACT:
A digital halftone image is produced by providing a binary bit image pattern having a minimum visual noise for each density level in the image, and the binary bit patterns being correlated in a manner that reduces visual noise resulting from transitions between patterns. The patterns are addressed by pixel density and x,y location to produce a halftone image. The patterns are generated by employing a stochastic minimization technique with a constraint to insure correlation between patterns.

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