Accelerated EM-based clustering of large data sets - Inria - Institut national de recherche en sciences et technologies du numérique Access content directly
Journal Articles Data Mining and Knowledge Discovery Year : 2006

Accelerated EM-based clustering of large data sets

Jakob Verbeek
Nikos Vlassis
  • Function : Author
  • PersonId : 853678

Abstract

Motivated by the poor performance (linear complexity) of the EM algorithm in clustering large data sets, and inspired by the successful accelerated versions of related algorithms like k-means, we derive an accelerated variant of the EM algorithm for Gaussian mixtures that: (1) offers speedups that are at least linear in the number of data points, (2) ensures convergence by strictly increasing a lower bound on the data log-likelihood in each learning step, and (3) allows ample freedom in the design of other accelerated variants. We also derive a similar accelerated algorithm for greedy mixture learning, where very satisfactory results are obtained. The core idea is to define a lower bound on the data log-likelihood based on a grouping of data points. The bound is maximized by computing in turn (i) optimal assignments of groups of data points to the mixture components, and (ii) optimal re-estimation of the model parameters based on average sufficient statistics computed over groups of data points. The proposed method naturally generalizes to mixtures of other members of the exponential family. Experimental results show the potential of the proposed method over other state-of-the-art acceleration techniques.
Fichier principal
Vignette du fichier
Verbeek04dmkd_rev.pdf (243.23 Ko) Télécharger le fichier
Vignette du fichier
VNV06.png (26.83 Ko) Télécharger le fichier
Origin : Files produced by the author(s)
Format : Figure, Image
Loading...

Dates and versions

inria-00321022 , version 1 (25-01-2011)
inria-00321022 , version 2 (11-04-2011)

Identifiers

Cite

Jakob Verbeek, Jan Nunnink, Nikos Vlassis. Accelerated EM-based clustering of large data sets. Data Mining and Knowledge Discovery, 2006, Data Mining and Knowledge Discovery, 13 (3), pp.291-307. ⟨10.1007/s10618-005-0033-3⟩. ⟨inria-00321022v2⟩
364 View
607 Download

Altmetric

Share

Gmail Facebook X LinkedIn More