SMOTE-D a deterministic version of SMOTE

Abstract

Imbalanced data is a problem of current research interest. This problem arises when the number of objects in a class is much lower than in other classes. In order to address this problem several methods for oversampling the minority class have been proposed. Oversampling methods generate synthetic objects for the minority class in order to balance the amount of objects between classes, among them, SMOTE is one of the most successful and well-known methods. In this paper, we introduce a modification of SMOTE which deterministically generates synthetic objects for the minority class. Our proposed method eliminates the random component of SMOTE and generates different amount of synthetic objects for each object of the minority class. An experimental comparison of the proposed method against SMOTE in standard imbalanced datasets is provided. The experimental results show an improvement of our proposed method regarding SMOTE, in terms of F-measure.