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A study on L2-loss (squared hinge-loss) multiclass SVM.
Lee, Ching-Pei; Lin, Chih-Jen.
Afiliação
  • Lee CP; Department of Computer Science, National Taiwan University, Taipei 10617, Taiwan. r00922098@csie.ntu.edu.tw
Neural Comput ; 25(5): 1302-23, 2013 May.
Article em En | MEDLINE | ID: mdl-23470126
Crammer and Singer's method is one of the most popular multiclass support vector machines (SVMs). It considers L1 loss (hinge loss) in a complicated optimization problem. In SVM, squared hinge loss (L2 loss) is a common alternative to L1 loss, but surprisingly we have not seen any paper studying the details of Crammer and Singer's method using L2 loss. In this letter, we conduct a thorough investigation. We show that the derivation is not trivial and has some subtle differences from the L1 case. Details provided in this work can be a useful reference for those who intend to use Crammer and Singer's method with L2 loss. They do not need a tedious process to derive everything by themselves. Furthermore, we present some new results on and discussion of both L1- and L2-loss formulations.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2013 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2013 Tipo de documento: Article