@ARTICLE\{IMM2012-06476,
    author       = "K. W. J{\o}rgensen and L. K. Hansen",
    title        = "Model Selection for Gaussian Kernel {PCA} Denoising",
    year         = "2012",
    month        = "jan",
    keywords     = "Denoising, kernel principal component analysis, model selection, parallel analysis",
    pages        = "163-167",
    journal      = "{IEEE} Transactions on Neural Networks and Learning Systems",
    volume       = "23",
    editor       = "",
    number       = "1",
    publisher    = "",
    url          = "http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6104221",
    abstract     = "We propose kernel parallel analysis (kPA) for automatic kernel scale and model order selection in Gaussian kernel principal component analysis (KPCA). Parallel analysis is based on a permutation test for covariance and has previously been applied for model order selection in linear {PCA,} we here augment the procedure to also tune the Gaussian kernel scale of radial basis function based {KPCA}. We evaluate kPA for denoising of simulated data and the U.S. postal data set of handwritten digits. We find that kPA outperforms other heuristics to choose the model order and kernel scale in terms of signal-to-noise ratio of the denoised data."
}