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• W1981401636 abstract "Recently, there has been a lot of success in the development of effective binary classifiers. Although many statistical classification techniques have natural multiclass extensions, some, such as the support vector machines, do not. The existing techniques for mapping multiclass problems onto a set of simpler binary classification problems run into serious efficiency problems when there are hundreds or even thousands of classes, and these are the scenarios where this paper's contributions shine. We introduce the concept of correlation and joint probability of base binary learners. We learn these properties during the training stage, group the binary leaner's based on their independence and, with a Bayesian approach, combine the results to predict the class of a new instance. Finally, we also discuss two additional strategies: one to reduce the number of required base learners in the multiclass classification, and another to find new base learners that might best complement the existing set. We use these two new procedures iteratively to complement the initial solution and improve the overall performance. This paper has two goals: finding the most discriminative binary classifiers to solve a multiclass problem and keeping up the efficiency, i.e., small number of base learners. We validate and compare the method with a diverse set of methods of the literature in several public available datasets that range from small (10 to 26 classes) to large multiclass problems (1000 classes) always using simple reproducible scenarios." @default.
• W1981401636 created "2016-06-24" @default.
• W1981401636 creator A5006749804 @default.
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• W1981401636 date "2014-02-01" @default.
• W1981401636 modified "2023-10-14" @default.
• W1981401636 title "Multiclass From Binary: Expanding One-Versus-All, One-Versus-One and ECOC-Based Approaches" @default.
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• W1981401636 doi "https://doi.org/10.1109/tnnls.2013.2274735" @default.
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