Halftoning method and apparatus, and computer-readable...

Details Halftoning method and apparatus, and computer-readable... Halftoning method and apparatus, and computer-readable...

2005-12-06

2005-12-06

Rogers, Scott A. (Department: 2626)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003260

Reexamination Certificate

active

06972873

ABSTRACT:
A halftoning apparatus free of the occurrence of moiré and other artifacts under a simple technique. In the apparatus, a binarizing section converts the multilevel value of a given noteworthy pixel of the multilevel input image into a binary value while pixels of the input image are scanned successively, an error diffusing section diffuses an occurred error in binary value with respect to the noteworthy pixel to unscanned pixels adjacent to the noteworthy pixel by one diffusion technique, and an error diffusion technique changing section changes the diffusion technique to another in accordance with a predetermined manner as the scanning of the successive pixels of the multilevel input image progresses.

REFERENCES:
patent: 4654721 (1987-03-01), Goertzel et al.
patent: 4876610 (1989-10-01), Ohsawa et al.
patent: 4878125 (1989-10-01), Katayama et al.
patent: 4955065 (1990-09-01), Ulichney
patent: 5051844 (1991-09-01), Sullivan
patent: 5140432 (1992-08-01), Chan
patent: 5201013 (1993-04-01), Kumagai
patent: 6026199 (2000-02-01), Sommer
patent: 6427030 (2002-07-01), Williams et al.
patent: 474 985 (1992-03-01), None
patent: 696 129 (1996-02-01), None
patent: 734 150 (1996-09-01), None
patent: 837 598 (1998-04-01), None
patent: 58-189641 (1983-11-01), None
patent: 06-006586 (1994-01-01), None
patent: 06-070144 (1994-03-01), None
patent: 07-274015 (1995-10-01), None
“Multiple Error Correction Algorithm for Halftone, Continuous Tone and Text Reproduction”, S.J. Fox, et al., IBM Technical Disclosure Bulletin, vol. 23, No. 10, Mar. 1981 (pps. 4433-4435).

Affiliated with

Also associated with

Rating

Halftoning method and apparatus, and computer-readable... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Halftoning method and apparatus, and computer-readable..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Halftoning method and apparatus, and computer-readable... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3522985