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Color error diffusion based on multilevel halftone

[+] Author Affiliations
Wenhua Zhu

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

Hangzhou Dianzi University, School of Information Engineering, Hangzhou 310018, China

Chun Chen

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

Qiang Wang

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

Jiajun Bu

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

J. Electron. Imaging. 23(4), 043006 (Jul 14, 2014). doi:10.1117/1.JEI.23.4.043006
History: Received November 18, 2013; Revised June 5, 2014; Accepted June 16, 2014
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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.

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Citation

Wenhua Zhu ; Chun Chen ; Qiang Wang and Jiajun Bu
"Color error diffusion based on multilevel halftone", J. Electron. Imaging. 23(4), 043006 (Jul 14, 2014). ; http://dx.doi.org/10.1117/1.JEI.23.4.043006


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