Article ID Journal Published Year Pages File Type
404592 Knowledge-Based Systems 2016 13 Pages PDF
Abstract

•Extending binary ensemble techniques to multi-class imbalanced data.•OVO scheme enhancement for multi-class imbalanced data by ensemble learning.•A complete experimental study of comparison of the ensemble learning techniques with OVO.•Study of the impact of base classifiers used in the proposed scenario.

Multi-class imbalance classification problems occur in many real-world applications, which suffer from the quite different distribution of classes. Decomposition strategies are well-known techniques to address the classification problems involving multiple classes. Among them binary approaches using one-vs-one and one-vs-all has gained a significant attention from the research community. They allow to divide multi-class problems into several easier-to-solve two-class sub-problems. In this study we develop an exhaustive empirical analysis to explore the possibility of empowering the one-vs-one scheme for multi-class imbalance classification problems with applying binary ensemble learning approaches. We examine several state-of-the-art ensemble learning methods proposed for addressing the imbalance problems to solve the pairwise tasks derived from the multi-class data set. Then the aggregation strategy is employed to combine the binary ensemble outputs to reconstruct the original multi-class task. We present a detailed experimental study of the proposed approach, supported by the statistical analysis. The results indicate the high effectiveness of ensemble learning with one-vs-one scheme in dealing with the multi-class imbalance classification problems.

Related Topics
Physical Sciences and Engineering Computer Science Artificial Intelligence
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