Salt-and-pepper-noise reduction

Details Salt-and-pepper-noise reduction Salt-and-pepper-noise reduction

1996-09-09

1998-11-17

Evans, Arthur G.

395102, G06K 1500

Patent

active

058388850

ABSTRACT:
In a controller for an ink-jet printer that employs both a colored-ink cartridge and a black-ink cartridge, an error-diffusion-type half-toning operation (62) determines a binary value (K.sub.B) for the black component independently of the half-toning performed to determine binary values (C.sub.B, M.sub.B, Y.sub.B) for the color components. Furthermore, the commands that specify the pixel locations at which black ink is to be deposited are determined in accordance with the binary black value K.sub.B independently of the commands for colored ink. Together with an undercolor-removal process (59) in which a high-resolution black-component input to the half-toning process is significantly less than the minimum of the values of the color components throughout most of their range, this arrangement minimizes the salt-and-pepper noise that can otherwise afflict printers in which the black and colored inks are applied from different ink cartridges.

REFERENCES:
patent: 4682186 (1987-07-01), Sasaki et al.
patent: 4959790 (1990-09-01), Morgan
patent: 5031050 (1991-07-01), Chan
patent: 5111302 (1992-05-01), Chan et al.
patent: 5387987 (1995-02-01), Ino
patent: 5402245 (1995-03-01), Motta et al.
patent: 5428377 (1995-06-01), Stoffel et al.
patent: 5469276 (1995-11-01), Shu
patent: 5473446 (1995-12-01), Perumal, Jr. et al.
patent: 5475800 (1995-12-01), Vaughn et al.
patent: 5488672 (1996-01-01), Mita
patent: 5488673 (1996-01-01), Katayama et al.
patent: 5497180 (1996-03-01), Kawakami et al.
patent: 5675716 (1997-10-01), Shu
Foley, James D., et al., Computer Graphics, Second Edition, Addison-Wesley Publishing Company Nov. 93.

Affiliated with

Also associated with

Rating

Salt-and-pepper-noise reduction does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Salt-and-pepper-noise reduction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Salt-and-pepper-noise reduction will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-893943