Ensemble selection based on classifier prediction confidence.

Nguyen, Tien Thanh; Luong, Anh Vu; Dang, Manh Truong; Liew, Alan Wee-Chung; McCall, John

Abstract

Ensemble selection is one of the most studied topics in ensemble learning because a selected subset of base classifiers may perform better than the whole ensemble system. In recent years, a great many ensemble selection methods have been introduced. However, many of these lack flexibility: either a fixed subset of classifiers is pre-selected for all test samples (static approach), or the selection of classifiers depends upon the performance of techniques that define the region of competence (dynamic approach). In this paper, we propose an ensemble selection method that takes into account each base classifier's confidence during classification and the overall credibility of the base classifier in the ensemble. In other words, a base classifier is selected to predict for a test sample if the confidence in its prediction is higher than its credibility threshold. The credibility thresholds of the base classifiers are found by minimizing the empirical 0-1 loss on the entire training observations. In this way, our approach integrates both the static and dynamic aspects of ensemble selection. Experiments on 62 datasets demonstrate that the proposed method achieves much better performance in comparison to some ensemble methods.

Citation

NGUYEN, T.T., LUONG, A.V., DANG, M.T., LIEW, A.W.-C. and MCCALL, J. 2020. Ensemble selection based on classifier prediction confidence. Pattern recognition [online], 100, article ID 107104. Available from: https://doi.org/10.1016/j.patcog.2019.107104

• Journal Article Type: Article
• Acceptance Date: Nov 3, 2019
• Online Publication Date: Nov 4, 2019
• Publication Date: Apr 30, 2020
• Deposit Date: Nov 8, 2019
• Publicly Available Date: Nov 5, 2020
• Journal: Pattern recognition
• Print ISSN: 0031-3203
• Electronic ISSN: 1873-5142
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 100
• Article Number: 107104
• DOI: https://doi.org/10.1016/j.patcog.2019.107104
• Keywords: Ensemble method; Multiple classifier system; Ensemble selection; Classifier selection; Artificial bee colony
• Public URL: https://rgu-repository.worktribe.com/output/744295