Apparatus for reducing artifacts in error diffused images

Details Apparatus for reducing artifacts in error diffused images Apparatus for reducing artifacts in error diffused images

1988-08-29

1991-11-26

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

358166, 358167, 382 27, H04N 521, H04N 140

Patent

active

050689142

ABSTRACT:
A recursive spatial filter interchanges the value of a control pixel with that of the value of a predetermined one of the surrounding pixels in a pixel mask when a specific image pattern occurs in the digital image. The use of such a filter eliminates certain highly visible grain patterns from the halftoned digital image while preserving the average gray level.

REFERENCES:
patent: 4231065 (1980-10-01), Fitch et al.
patent: 4339774 (1986-07-01), Temple
patent: 4360883 (1982-11-01), Ejiri et al.
patent: 4482923 (1984-11-01), Fischer et al.
patent: 4517606 (1985-05-01), Yokomizo
patent: 4532503 (1985-07-01), Pennebaker
patent: 4541116 (1985-09-01), Lougheed
patent: 4573070 (1986-02-01), Cooper
patent: 4578713 (1986-03-01), Tsao et al.
patent: 4593278 (1986-06-01), Koos, Jr. et al.
patent: 4625330 (1986-11-01), Higgins
patent: 4694342 (1987-09-01), Klees

Affiliated with

Also associated with

Rating

Apparatus for reducing artifacts in error diffused images does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for reducing artifacts in error diffused images, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for reducing artifacts in error diffused images will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2390602