Impulse Noise Filtering Using Robust Pixel-Wise S-Estimate of Variance

Autor: Crnojević Vladimir, Petrović NemanjaI
Jazyk: angličtina
Rok vydání: 2010
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Zdroj: EURASIP Journal on Advances in Signal Processing, Vol 2010, Iss 1, p 830702 (2010)
Druh dokumentu: article
ISSN: 1687-6172
1687-6180
Popis: A novel method for impulse noise suppression in images, based on the pixel-wise S-estimator, is introduced. The S-estimator is an alternative for the well-known robust estimate of variance MAD, which does not require a location estimate and hence is more appropriate for asymmetric distributions, frequently encountered in transient regions of the image. The proposed computationally efficient modification of a robust S-estimator of variance is successfully utilized in iterative scheme for impulse noise filtering. Another novelty is that the proposed iterative algorithm has automatic stopping criteria, also based on the pixel-wise S-estimator. Performances of the proposed filter are independent of the image content or noise concentration. The proposed filter outperforms all state-of-the-art filters included in a large comparison, both objectively (in terms of PSNR and MSSIM) and subjectively.
Databáze: Directory of Open Access Journals
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