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Block-based threshold modulation error diffusion

[+] Author Affiliations
Yan Zhou

Zhejiang University, Zhejiang Key Laboratory of Service Robot, College of Computer Science, Hangzhou, 310027, China

Chun Chen

Zhejiang University, Zhejiang Key Laboratory of Service Robot, College of Computer Science, Hangzhou, 310027, China

Qiang Wang

Zhejiang University, Zhejiang Key Laboratory of Service Robot, College of Computer Science, Hangzhou, 310027, China

Jiajun Bu

Zhejiang University, Zhejiang Key Laboratory of Service Robot, College of Computer Science, Hangzhou, 310027, China

Hua Zhou

Zhejiang Sci-Tech University, College of Materials and Textiles, Hangzhou, 310008, China

J. Electron. Imaging. 20(1), 013018 (March 25, 2011). doi:10.1117/1.3555132
History: Received February 12, 2010; Revised January 25, 2011; Accepted January 26, 2011; Published March 25, 2011; Online March 25, 2011
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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.

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Citation

Yan Zhou ; Chun Chen ; Qiang Wang ; Jiajun Bu and Hua Zhou
"Block-based threshold modulation error diffusion", J. Electron. Imaging. 20(1), 013018 (March 25, 2011). ; http://dx.doi.org/10.1117/1.3555132


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