One Class Splitting Criteria for Random Forests


Nicolas Goix, Nicolas Drougard, Romain Brault, Mael Chiapino ;
Proceedings of the Ninth Asian Conference on Machine Learning, PMLR 77:343-358, 2017.


Random Forests (RFs) are strong machine learning tools for classification and regression. However, they remain supervised algorithms, and no extension of RFs to the one-class setting has been proposed, except for techniques based on second-class sampling. This work fills this gap by proposing a natural methodology to extend standard splitting criteria to the one-class setting, structurally generalizing RFs to one-class classification. An extensive benchmark of seven state-of-the-art anomaly detection algorithms is also presented. This empirically demonstrates the relevance of our approach.

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