A new random forest method for one-class classification

Authors:
Chesner Désir;Simon Bernard;Caroline Petitjean;Laurent Heutte
Affiliations:
Université de Rouen, LITIS EA 4108, Saint-Etienne-du-Rouvray, France;Department of EECS et GIGA-Research, Université de Liège, Liège, Belgium;Université de Rouen, LITIS EA 4108, Saint-Etienne-du-Rouvray, France;Université de Rouen, LITIS EA 4108, Saint-Etienne-du-Rouvray, France
Venue:
SSPR'12/SPR'12 Proceedings of the 2012 Joint IAPR international conference on Structural, Syntactic, and Statistical Pattern Recognition
Year:
2012

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Abstract

We propose a new one-class classification method, called One Class Random Forest, that is able to learn from one class of samples only. This method, based on a random forest algorithm and an original outlier generation procedure, makes use of the ensemble learning mechanisms offered by random forest algorithms to reduce both the number of artificial outliers to generate and the size of the feature space in which they are generated. We show that One Class Random Forests perform well on various UCI public datasets in comparison to few other state-of-the-art one class classification methods (gaussian density models, Parzen estimators, gaussian mixture models and one-class SVMs).