Impulsive noise removal via sparse representation

Fenge Chen; Guorui Ma; Liyu Lin; Qianqing Qin

doi:10.1117/1.JEI.22.4.043014

12 November 2013 Impulsive noise removal via sparse representation

Fenge Chen, Guorui Ma, Liyu Lin, Qianqing Qin

Author Affiliations +

Journal of Electronic Imaging, Vol. 22, Issue 4, 043014 (November 2013). https://doi.org/10.1117/1.JEI.22.4.043014

Abstract

We propose a two-phase approach to restore images corrupted by impulsive noise based on sparse representation. In the first phase, we identify the outlier candidates—the pixels that are likely to be corrupted by impulsive noise. In the second phase, the image is denoised via dictionary learning by using the outlier-free data. The dictionary learning task is formulated as a modified l [sub]1 −l ₁ minimization objective and solved under the alternating direction method. The experimental results demonstrate that our method can obtain better performances in terms of both quantitative evaluation and visual quality than the state-of-the-art impulse denoising methods.

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Fenge Chen, Guorui Ma, Liyu Lin, and Qianqing Qin "Impulsive noise removal via sparse representation," Journal of Electronic Imaging 22(4), 043014 (12 November 2013). https://doi.org/10.1117/1.JEI.22.4.043014

Published: 12 November 2013

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