Variational Learning of Clusters of Undercomplete Nonsymmetric Independent Components

Variational Learning of Clusters of Undercomplete Nonsymmetric Independent Components (2002)

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by Kwokleung Chan , Te-won Lee , Terrence Sejnowski

Venue:	In Proc. Int. Conf. on Independent Component Analysis and Signal Separation (ICA2001
Citations:	17 - 6 self

BibTeX

@INPROCEEDINGS{Chan02variationallearning,
    author = {Kwokleung Chan and Te-won Lee and Terrence Sejnowski},
    title = {Variational Learning of Clusters of Undercomplete Nonsymmetric Independent Components},
    booktitle = {In Proc. Int. Conf. on Independent Component Analysis and Signal Separation (ICA2001},
    year = {2002},
    pages = {492--497}
}

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Abstract

We apply a variational method to automatically determine the number of mixtures of independent components in high-dimensional datasets, in which the sources may be nonsymmetrically distributed. The data are modeled by clusters where each cluster is described as a linear mixture of independent factors. The variational Bayesian method yields an accurate density model for the observed data without overfitting problems. This allows the dimensionality of the data to be identified for each cluster. The new method was successfully applied to a difficult real-world medical dataset for diagnosing glaucoma.

Citations

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