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• W2001096515 abstract "Nonnegative matrix factorization (NMF) under the separability assumption can provably be solved efficiently, even in the presence of noise, and has been shown to be a powerful technique in document classification and hyperspectral unmixing. This problem is referred to as near-separable NMF and requires that there exists a cone spanned by a small subset of the columns of the input nonnegative matrix approximately containing all columns. In this paper, we propose a preconditioning based on semidefinite programming making the input matrix well-conditioned. This in turn can improve significantly the performance of near-separable NMF algorithms which is illustrated on the popular successive projection algorithm (SPA). The new preconditioned SPA is provably more robust to noise, and outperforms SPA on several synthetic data sets. We also show how an active-set method allow us to apply the preconditioning on large-scale real-world hyperspectral images." @default.
• W2001096515 created "2016-06-24" @default.
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• W2001096515 date "2015-01-01" @default.
• W2001096515 modified "2023-09-25" @default.
• W2001096515 title "Semidefinite Programming Based Preconditioning for More Robust Near-Separable Nonnegative Matrix Factorization" @default.
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• W2001096515 doi "https://doi.org/10.1137/130940670" @default.
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