Halftone dot arrangement in gray level halftone printing

Details Halftone dot arrangement in gray level halftone printing Halftone dot arrangement in gray level halftone printing

1992-06-05

1993-11-02

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358457, 358459, H04N 123

Patent

active

052588491

ABSTRACT:
A method and apparatus for reproducing an original image, having a scanner which scans and digitizes the original image into pixels, a controller coupled to the scanner to receive the digitized original image, and which produces a first signal corresponding to a gray level halftoned representation of the digitized original image, and a printer coupled to the controller to receive the first signal and which produces a gray level halftoned reproduction of the original image. The controller groups the pixels into cells that each have a determined cell gray level, and controls the formation of dots within the pixels of an individual cell by the printer such that for each increase in cell gray level, a dot at at least one of the pixels in the cell forms to a larger dot-size. Sequential forming of the dots occurs at the pixels in the cell in a pre-defined order such that each dot is formed to a first dot-size less than a maximum dot-size before beginning the formation of a dot at another pixel within the cell. When all of the dots in the cell have been formed to the first dot-size corresponding to a specific cell gray level, the dot-size of each of the dots is increased in the pre-defined order to a second dot-size, corresponding to increasing cell gray levels.

REFERENCES:
patent: 4412226 (1983-10-01), Yoshida
patent: 4736254 (1988-04-01), Kotera
patent: 5075780 (1991-12-01), Shibahara

Affiliated with

Also associated with

Rating

Halftone dot arrangement in gray level halftone printing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Halftone dot arrangement in gray level halftone printing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Halftone dot arrangement in gray level halftone printing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1761792