Process for electronic processing of multi-colored continuous-to

Details Process for electronic processing of multi-colored continuous-to Process for electronic processing of multi-colored continuous-to

1993-05-20

1996-08-20

Wong, Peter S.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358533, 358535, 358536, H04N 140, H04N 146, H04N 152

Patent

active

055484077

ABSTRACT:
Halftoned frequency modulated color separations are produced from continuous-tone multicolored artefacts. The continuous tone values of the pixels of the scanned artefact are simulated by once and for all fixed halftone dot patterns within the pixels (tiles) of the halftoned reproduction. The dot patterns of the different tone levels are different for each individual color separation but are connected with each other through criteria specifying an overlapping dot ratio in conjunction with a translation prohibition, thereby substantially suppressing moire, disturbing effects of mis-register (e.g. color shifts) and graininess that is often seen in the highlights and midtones of reproductions with stochastic distribution of the halftone dots.

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