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arXiv 2007.09539stat.MEcs.CVstat.CO
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高斯核平滑

Gaussian kernel smoothing

University of Wisconsin-Madison(威斯康星大学麦迪逊分校)

Moo K. Chung

摘要:

图像采集和分割很可能会引入噪声。进一步的图像处理,如图像配准和参数化,可以引入额外的噪声。因此,必须减少噪声测量并提升信号。为了增加信噪比(SNR)和随后的基于随机场理论的统计推断所需的数据的平滑度,某种类型的平滑是必要的。在众多的图像平滑方法中,高斯核平滑由于其数值实现简单,已经成为脑成像研究者的一种事实上的平滑技术。高斯核平滑还增加了统计灵敏度和统计功效以及高斯性。高斯核平滑可以被视为体素值的加权平均。那么从中心极限定理看,加权平均值应该更高斯。

英文摘要:

Image acquisition and segmentation are likely to introduce noise. Further image processing such as image registration and parameterization can introduce additional noise. It is thus imperative to reduce noise measurements and boost signal. In order to increase the signal-to-noise ratio (SNR) and smoothness of data required for the subsequent random field theory based statistical inference, some type of smoothing is necessary. Among many image smoothing methods, Gaussian kernel smoothing has emerged as a de facto smoothing technique among brain imaging researchers due to its simplicity in numerical implementation. Gaussian kernel smoothing also increases statistical sensitivity and statistical power as well as Gausianness. Gaussian kernel smoothing can be viewed as weighted averaging of voxel values. Then from the central limit theorem, the weighted average should be more Gaussian.

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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