IEEE Transactions on Image Processing,
vol. 16, no. 1, Jan. 2007, pp. 198-211.
Design of Tone Dependent Color Error Diffusion Halftoning Systems
Vishal Monga (1),
Damera-Venkata (2) and
Brian L. Evans (1)
(1) Embedded Signal Processing
Center for Perceptual Systems,
The University of Texas at Austin,
Austin, TX 78712-1084 USA
(2) Hewlett-Packard Laboratories,
1501 Page Mill Road,
Palo Alto, CA 94304
Draft of Paper
at UT Austin
Conventional grayscale error diffusion halftoning produces worms and other
Tone dependent error diffusion reduces these artifacts by controlling the
diffusion of quantization errors based on the input graylevel.
This paper extends tone dependent error diffusion to color.
In color error diffusion, what color to render becomes a major concern
in addition to finding optimal dot patterns.
We propose a visually meaningful scheme to train input level (or tone)
dependent color error filters.
Our design approach employs a Neugebauer printer model and a color HVS
model that takes into account spatial considerations in color reproduction.
The resulting halftones overcome several traditional error diffusion
artifacts and achieve significantly greater accuracy in color rendition.
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Last Updated 01/18/07.