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Design of Tone-Dependent Color-Error Diffusion Halftoning Systems

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3 Author(s)
Monga, V. ; Xerox Wilson Res. Center, Webster, NY ; Damera-Venkata, N. ; Evans, B.L.

Grayscale error diffusion introduces nonlinear distortion (directional artifacts and false textures), linear distortion (sharpening), and additive noise. Tone-dependent error diffusion (TDED) reduces these artifacts by controlling the diffusion of quantization errors based on the input graylevel. We present an extension of TDED to color. In color-error diffusion, which 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 human visual system 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

Published in:

Image Processing, IEEE Transactions on  (Volume:16 ,  Issue: 1 )

Date of Publication:

Jan. 2007

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