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- W2161882007 abstract "Recently, the dual-tree complex wavelet transform has been proposed as an analysis tool featuring near shift-invariance and improved directional selectivity compared to the standard wavelet transform. Within this framework, we describe a novel technique for removing noise from digital images. We design a bivariate maximum a posteriori estimator, which relies on the family of isotropic α-stable distributions. Using this relatively new statistical model we are able to better capture the heavy-tailed nature of the data as well as the interscale dependencies of wavelet coefficients. We test our algorithm for the Cauchy case, in comparison with several recently published methods. The simulation results show that our proposed technique achieves state-of-the-art performance in terms of root mean squared (RMS) error." @default.
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- W2161882007 date "2005-01-01" @default.
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- W2161882007 title "Image denoising using bivariate α-stable distributions in the complex wavelet domain" @default.
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- W2161882007 doi "https://doi.org/10.1109/lsp.2004.839692" @default.
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