Tremblay, Nicolas
Puy, Gilles
Borgnat, Pierre
Gribonval, RĂ©mi
Vandergheynst, Pierre
Accelerated Spectral Clustering Using Graph Filtering of Random Signals
2016 Ieee International Conference On Acoustics, Speech And Signal Processing Proceedings
978-1-4799-9988-01520-6149
4094-4098
5
We build upon recent advances in graph signal processing to propose a faster spectral clustering algorithm. Indeed, classical spectral clustering is based on the computation of the first $k$ eigenvectors of the similarity matrix' Laplacian, whose computation cost, even for sparse matrices, becomes prohibitive for large datasets. We show that we can estimate the spectral clustering distance matrix without computing these eigenvectors: by graph filtering random signals. Also, we take advantage of the stochasticity of these random vectors to estimate the number of clusters $k$. We compare our method to classical spectral clustering on synthetic data, and show that it reaches equal performance while being faster by a factor at least two for large datasets.
graph signal processing;
spectral clustering;
Ieee
New York
2016
http://infoscience.epfl.ch/record/212742/files/ICASSP_2016_lap.pdf;