High precision gradation compensation for stochastic screening

Details High precision gradation compensation for stochastic screening High precision gradation compensation for stochastic screening

1996-05-02

1998-10-06

Frahm, Eric

Facsimile and static presentation processing

Facsimile

Recording apparatus

358456, 358536, H04N 140, H04N 152

Patent

active

058186042

ABSTRACT:
A halftone screen and method for generating halftones representing a continuous tone image, wherein the number of halftone dots per unit area varies non-proportionally with the tone values utilized as inputs to the screening process. The method incorporates an implicit gradation compensation as part of the frequency modulation halftoning itself to correct for the additional tone gain due to recording, plate processing and/or printing, as well as aesthetic corrections. This implicit compensation has the advantage that no external compensation is required, thereby maintaining the number of tone values which can be rendered on a digital system. Finally, the implicit gradation compensation enables the combination of page elements rendered according to either "conventional" or "frequency-modulated" halftoning techniques with appropriate tone-matching.

REFERENCES:
patent: 4347523 (1982-08-01), Ohara
patent: 4920501 (1990-04-01), Sullivan et al.
patent: 5111310 (1992-05-01), Parker et al.
patent: 5166809 (1992-11-01), Surbrook
patent: 5278670 (1994-01-01), Eschbach
patent: 5335089 (1994-08-01), Xie et al.
patent: 5341228 (1994-08-01), Parker et al.
patent: 5363213 (1994-11-01), Coward et al.
patent: 5394252 (1995-02-01), Holladay et al.
patent: 5426519 (1995-06-01), Barton

Affiliated with

Also associated with

Rating

High precision gradation compensation for stochastic screening does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High precision gradation compensation for stochastic screening, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High precision gradation compensation for stochastic screening will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-85068