Semi-supervised multi-class Adaboost by exploiting unlabeled data

  • Authors:
  • Enmin Song;Dongshan Huang;Guangzhi Ma;Chih-Cheng Hung

  • Affiliations:
  • School of Computer Science and Technology, Huazhong University of Science and Technology, China;School of Computer Science and Technology, Huazhong University of Science and Technology, China;School of Computer Science and Technology, Huazhong University of Science and Technology, China;School of Computing and Software Engineering, Southern Polytechnic State University, USA

  • Venue:
  • Expert Systems with Applications: An International Journal
  • Year:
  • 2011

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Abstract

Semi-supervised learning has attracted much attention in pattern recognition and machine learning. Most semi-supervised learning algorithms are proposed for binary classification, and then extended to multi-class cases by using approaches such as one-against-the-rest. In this work, we propose a semi-supervised learning method by using the multi-class boosting, which can directly classify the multi-class data and achieve high classification accuracy by exploiting the unlabeled data. There are two distinct features in our proposed semi-supervised learning approach: (1) handling multi-class cases directly without reducing them to multiple two-class problems, and (2) the classification accuracy of each base classifier requiring only at least 1/K or better than 1/K (K is the number of classes). Experimental results show that the proposed method is effective based on the testing of 21 UCI benchmark data sets.