Combination of Instance Selection and Data Augmentation Techniques for Imbalanced Data Classification
Subject Areas : electrical and computer engineeringParastoo Mohaghegh 1 , Samira Noferesti 2 , Mehri Rajaei 3
1 - Faculty of Electrical and Computer Engineering, University of Sistan and Baluchestan
2 -
3 - University of Sistan and Baluchestan
Keywords: Instance selection, data augmentation, classification, imbalanced data, data mining, machine learning,
Abstract :
Mohaghegh, S. Noferesti*, and M. Rajaei Abstract: In the era of big data, automatic data analysis techniques such as data mining have been widely used for decision-making and have become very effective. Among data mining techniques, classification is a common method for decision making and prediction. Classification algorithms usually work well on balanced datasets. However, one of the challenges of the classification algorithms is how to correctly predicting the label of new samples based on learning on imbalanced datasets. In this type of dataset, the heterogeneous distribution of the data in different classes causes examples of the minority class to be ignored in the learning process, while this class is more important in some prediction problems. To deal with this issue, in this paper, an efficient method for balancing the imbalanced dataset is presented, which improves the accuracy of the machine learning algorithms to correct prediction of the class label of new samples. According to the evaluations, the proposed method has a better performance compared to other methods based on two common criteria in evaluating the classification of imbalanced datasets, namely "Balanced Accuracy" and "Specificity".
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