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Dimensionality reduction via compressive sensing
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DOI：10.1016/j.patrec.2012.02.007.png)
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Compressive sensing is an emerging field predicated upon the fact that, if a signal has a sparse representation in some basis, then it can be almost exactly reconstructed from very few random measurements. Many signals and natural images, for example under the wavelet basis, have very sparse representations, thus those signals and images can be recovered from a small amount of measurements with very high accuracy. This paper is concerned with the dimensionality reduction problem based on the compressive assumptions. We propose novel unsupervised and semi-supervised dimensionality reduction algorithms by exploiting sparse data representations. The experiments show that the proposed approaches outperform state-of-the-art dimensionality reduction methods. (C) 2012 Elsevier B.V. All rights reserved.
Keyword:
Dimensionality reduction
Sparse models
PCA
Supervised learning
Un-supervised learning
Compressive sensing
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论文数:
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Principal manifolds and nonlinear dimensionality reduction via tangent space alignment基于切线空间对齐的主流形和非线性降维
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