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Image Denoising in Steerable Pyramid Domain Based on a Local Laplace Prior Publisher



Rabbani H1
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Authors Affiliations
  1. 1. Department of Biomedical Engineering, Isfahan University of Medical Sciences, Isfahan, Iran

Source: Pattern Recognition Published:2009


Abstract

This paper presents a new image denoising algorithm based on the modeling of coefficients in each subband of steerable pyramid employing a Laplacian probability density function (pdf) with local variance. This pdf is able to model the heavy-tailed nature of steerable pyramid coefficients and the empirically observed correlation between the coefficient amplitudes. Within this framework, we describe a novel method for image denoising based on designing both maximum a posteriori (MAP) and minimum mean squared error (MMSE) estimators, which relies on the zero-mean Laplacian random variables with high local correlation. Despite the simplicity of our spatially adaptive denoising method, both in its concern and implementation, our denoising results achieves better performance than several published methods such as Bayes least squared Gaussian scale mixture (BLS-GSM) technique that is a state-of-the-art denoising technique. © 2009 Elsevier Ltd. All rights reserved.
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