Method, apparatus and computer program for halftoning...

Details Method, apparatus and computer program for halftoning... Method, apparatus and computer program for halftoning...

2011-06-14

2011-06-14

Dang, Duy M (Department: 2624)

Image analysis

Image compression or coding

Gray level to binary coding

Reexamination Certificate

active

07961962

ABSTRACT:
A method for generating a halftone image includes the steps of, for each input pixel, adding a previously determined error term to the input pixel value to obtain a modified input pixel value; determining an error diffusion threshold level based on the input pixel value; applying a quantization operation to the modified input pixel value using the determined error diffusion threshold level for obtaining an output pixel value; and determining an error contribution. The error diffusion threshold level depends on a result of a comparison operation performed between the input pixel value and a threshold value selected from a set of threshold values, the selection of the threshold value being based on the position of the input pixel in the input image.

REFERENCES:
patent: 5014333 (1991-05-01), Miller et al.
patent: 2002/0181024 (2002-12-01), Morimoto et al.
patent: 2005/0046903 (2005-03-01), Yoshida
patent: 0544511 (1992-11-01), None
patent: 0817466 (1998-01-01), None
patent: 1646223 (2006-04-01), None
R. Floyd et al., An Adaptive Algorithm for Spatial Greyscale, pp. 75-77.

Affiliated with

Also associated with

Rating

Method, apparatus and computer program for halftoning... 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, apparatus and computer program for halftoning..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method, apparatus and computer program for halftoning... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2715449