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Journal of Electronic Imaging

Color error diffusion based on multilevel halftone
Author(s): Wenhua Zhu; Chun Chen; Qiang Wang; Jiajun Bu
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Paper Abstract

We propose a multilevel halftone-based color error diffusion (ED) algorithm. Our algorithm aims to achieve a “blue noise” color halftone by exploiting the interchannel relationship of a separated color image. The method focuses on dot distribution and dot overlapping control to yield high quality results. It treats color ED as a multilevel halftone and employs an embedded multilevel ED algorithm to determine the number of color dots in the processing pixel. In the color rendering process, the most suitable colors are selected as output based on the sum of the input and the error diffused from the processed dot. Experimental results show that the proposed algorithm generates high-quality halftone images with “blue noise” characteristics. Comparisons with state-of-the-art methods using objective and subjective measures show that our method is superior, as it effectively avoids dot overlapping and preserves the details of the original image.

Paper Details

Date Published: 14 July 2014
PDF: 11 pages
J. Electron. Imag. 23(4) 043006 doi: 10.1117/1.JEI.23.4.043006
Published in: Journal of Electronic Imaging Volume 23, Issue 4
Show Author Affiliations
Wenhua Zhu, Zhejiang Univ. (China)
Hangzhou Dianzi Univ. (China)
Chun Chen, Zhejiang Univ. (China)
Qiang Wang, Zhejiang Univ. (China)
Jiajun Bu, Zhejiang Univ. (China)

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