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arXiv 0903.2654stat.MEstat.CO
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相关系数贝叶斯小波阈值分割的理想模拟

Perfect simulation for Bayesian wavelet thresholding with correlated coefficients

Graeme K. Ambler, Bernard W. Silverman

摘要:

我们介绍了一种新的方法贝叶斯小波收缩重建信号时,我们观察到一个嘈杂的版本。而不是作出共同的假设,即信号的小波系数是独立的,我们允许的可能性,它们是本地相关的位置(时间)和规模(频率)。这导致我们的先验结构,这是分析上难以处理的,但它是可能的绘制独立的样本从一个密切的近似后验分布的方法的基础上耦合从过去。

英文摘要:

We introduce a new method of Bayesian wavelet shrinkage for reconstructing a signal when we observe a noisy version. Rather than making the common assumption that the wavelet coefficients of the signal are independent, we allow for the possibility that they are locally correlated in both location (time) and scale (frequency). This leads us to a prior structure which is analytically intractable, but it is possible to draw independent samples from a close approximation to the posterior distribution by an approach based on Coupling From The Past.

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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