Method and system for printing in one or more color planes with

Details Method and system for printing in one or more color planes with Method and system for printing in one or more color planes with

1990-09-12

1992-08-18

Miller, Jr., George H.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358455, 358458, 358460, H04N 121, H04N 123, H04N 140

Patent

active

051404320

ABSTRACT:
A pixel assignment and error diffusion system and method for gray scale printing in one or more color planes in the fields of ink jet printing, electrophotographic printing, or the like. The direction of each error diffusion with respect to the location of a just-scanned or just-processed super pixel within a larger scanned area is controlled by the contemporaneously developing gray scale profile and gradient over a previously scanned area defined by a predetermined number of previously scanned super pixels. This developing gray scale profile and gradient of a scanned image is used to select a matching error diffusion set of diffusion points, each having a relative weight W and a location L, from a chosen look-up table stored in memory. The relative weight W is proportional to the gray level intensity of the developing profile and the location L is proportional to the slope of the gradient of a family of gray level profile or contour lines, wherein the gradient is generally perpendicular to these lines. The selected error diffusion set is in turn used to control the direction and weighted distribution of an error remainder value R into areas of a processed image adjacent each just-scanned or just-processed super pixel within a larger scanned area.

REFERENCES:
patent: 4924322 (1990-05-01), Kurosawa
patent: 4969052 (1990-11-01), Ishida
patent: 5051844 (1991-09-01), Sullivan

Affiliated with

Also associated with

Rating

Method and system for printing in one or more color planes with does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and system for printing in one or more color planes with , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for printing in one or more color planes with will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1253148