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Spectral clustering
Clustering methods / From Wikipedia, the free encyclopedia
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In multivariate statistics, spectral clustering techniques make use of the spectrum (eigenvalues) of the similarity matrix of the data to perform dimensionality reduction before clustering in fewer dimensions. The similarity matrix is provided as an input and consists of a quantitative assessment of the relative similarity of each pair of points in the dataset.
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In application to image segmentation, spectral clustering is known as segmentation-based object categorization.