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Journal of Zhejiang University SCIENCE A 2002 Vol.3 No.2 P.131-134


Probability output of multi-class support vector machines

Author(s):  XIN Dong, WU Zhao-hui, PAN Yun-he

Affiliation(s):  Department of Computer Science & Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   xindong@cs.zju.edu.cn

Key Words:  Support vector machines (SVM), Posterior probability, Multi-class, Speaker verification

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XIN Dong, WU Zhao-hui, PAN Yun-he. Probability output of multi-class support vector machines[J]. Journal of Zhejiang University Science A, 2002, 3(2): 131-134.

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A novel approach to interpret the outputs of multi-class support vector machines is proposed in this paper. Using the geometrical interpretation of the classifying heperplane and the distance of the pattern from the hyperplane, one can calculate the posterior probability in binary classification case. This paper focuses on the probability output in multi-class phase where both the one-against-one and one-against-rest strategies are considered. Experiment on the speaker verification showed that this method has high performance.

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