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Proceedings Article

Moire-free color halftoning using 2x2 printer modeling

[+] Author Affiliations
Shenge Wang, Zhigang Fan

Xerox Corp. (USA)

Proc. SPIE 4300, Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts VI, 397 (December 21, 2000); doi:10.1117/12.410813
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From Conference Volume 4300

  • Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts VI
  • Reiner Eschbach; Gabriel G. Marcu
  • San Jose, CA | January 20, 2001

abstract

This paper introduces a moire-free color half toning algorithm. Moire patterns might appear in traditional halftone images. This could be caused by interference among halftone screens of different colors, or beating between he input image and the screens. In our algorithm, we adjust the halftone screens of different colors, or beating between the input image and the screens. In our algorithm, we adjust the halftone output in such a way that the low-frequency difference between the input and the appearance of the output is minimized. Due to non-linear color mixing, the appearance of a color print is not a simple combination of CMYK four channels, and is hence not easily predictable. We use the 2 by 2 printer model to estimate the pixel-level CIE-Lab values from the halftone output. Next we calculate the difference between the original CIE-Lab input image and the 2 by 2 estimation and run a low-pass filtering on the result. Then, we feed back the low-frequency difference into the input. The low-frequency-feedback process cancels the potential color moire patterns.

© (2000) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Shenge Wang and Zhigang Fan
"Moire-free color halftoning using 2x2 printer modeling", Proc. SPIE 4300, Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts VI, 397 (December 21, 2000); doi:10.1117/12.410813; http://dx.doi.org/10.1117/12.410813


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