2-D impulse noise suppression by recursive gaussian maximum likelihood estimation.
2-D impulse noise suppression by recursive gaussian maximum likelihood estimation.
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通过递归高斯最大似然估计抑制二维脉冲噪声
DOI:
10.1371/journal.pone.0096386
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Toumoulin C
中科院分区:
文献类型:
--
作者:
Chen Y;Yang J;Shu H;Shi L;Wu J;Luo L;Coatrieux JL;Toumoulin C
An effective approach termed Recursive Gaussian Maximum Likelihood Estimation (RGMLE) is developed in this paper to suppress 2-D impulse noise. And two algorithms termed RGMLE-C and RGMLE-CS are derived by using spatially-adaptive variances, which are respectively estimated based on certainty and joint certainty & similarity information. To give reliable implementation of RGMLE-C and RGMLE-CS algorithms, a novel recursion stopping strategy is proposed by evaluating the estimation error of uncorrupted pixels. Numerical experiments on different noise densities show that the proposed two algorithms can lead to significantly better results than some typical median type filters. Efficient implementation is also realized via GPU (Graphic Processing Unit)-based parallelization techniques.
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