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arXiv 2204.07544stat.MEstat.CO
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三点先验的Gamma-Minimax小波收缩

Gamma-Minimax Wavelet Shrinkage with Three-Point Priors

Dixon Vimalajeewa, Brani Vidakovic

摘要:

在本文中,我们提出了一种方法的小波去噪的信号污染的高斯噪声时,先验信息的$L^2$能量的信号。假设独立模型,根据该模型的小波系数被单独处理,我们提出了一个简单的,水平相关的收缩规则,原来是$Γ$ -极小极大的一个合适的类的先验。所提出的方法是特别适合在去噪任务时的信噪比是低的,这是由模拟电池的标准测试功能。并与一些常用的小波收缩方法进行了比较。

英文摘要:

In this paper we propose a method for wavelet denoising of signals contaminated with Gaussian noise when prior information about the $L^2$-energy of the signal is available. Assuming the independence model, according to which the wavelet coefficients are treated individually, we propose a simple, level dependent shrinkage rules that turn out to be $Γ$-minimax for a suitable class of priors. The proposed methodology is particularly well suited in denoising tasks when the signal-to-noise ratio is low, which is illustrated by simulations on the battery of standard test functions. Comparison to some standardly used wavelet shrinkage methods is provided.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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