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Journal of Electronic Imaging

Block-based threshold modulation error diffusion
Author(s): Yan Zhou; Chun Chen; Qiang Wang; Jiajun Bu; Hua Zhou
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Paper Abstract

In this paper, we describe a block-based threshold modulation error diffusion algorithm to parallelize the halftone process without generating both block-boundary and diagonal artifacts. A novel scan path is used to pass the quantization error effectively between blocks and the input-dependent threshold modulation is applied during the inner-block processing. To obtain a suitable parameter set for the error weights and threshold modulation strength, a cost function is designed. Experimental results show that the proposed algorithm generates high quality halftone images which are visually similar to those generated by serial error diffusion algorithms. Our algorithm achieves better performance both in quality and parallelism compared to other halftoning approaches.

Paper Details

Date Published: 1 January 2011
PDF: 10 pages
J. Electron. Imag. 20(1) 013018 doi: 10.1117/1.3555132
Published in: Journal of Electronic Imaging Volume 20, Issue 1
Show Author Affiliations
Yan Zhou, Zhejiang Univ. (China)
Chun Chen, Zhejiang Univ. (China)
Qiang Wang, Zhejiang Univ. (China)
Jiajun Bu, Zhejiang Univ. (China)
Hua Zhou, Zhejiang Sci-Tech Univ. (China)

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