2002 | OriginalPaper | Buchkapitel
A Hierarchical Model for Clustering and Categorising Documents
verfasst von : E. Gaussier, C. Goutte, K. Popat, F. Chen
Erschienen in: Advances in Information Retrieval
Verlag: Springer Berlin Heidelberg
Enthalten in: Professional Book Archive
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We propose a new hierarchical generative model for textual data, where words may be generated by topic specific distributions at any level in the hierarchy. This model is naturally well-suited to clustering documents in preset or automatically generated hierarchies, as well as categorising new documents in an existing hierarchy. Training algorithms are derived for both cases, and illustrated on real data by clustering news stories and categorising newsgroup messages. Finally, the generative model may be used to derive a Fisher kernel expressing similarity between documents.