Multiclass posterior probability support vector machines

Mehmet Gönen, Ayşe Gönül Tanuǧur, Ethem Alpaydin

Research output: Contribution to journalArticlepeer-review

59 Scopus citations


Tao et al. have recently proposed the posterior probability support vector machine (PPSVM) which uses soft labels derived from estimated posterior probabilities to be more robust to noise and outliers. Tao et al.'s model uses a window-based density estimator to calculate the posterior probabilities and is a binary classifier. We propose a neighbor-based density estimator and also extend the model to the multiclass case. Our bias-variance analysis shows that the decrease in error by PPSVM is due to a decrease in bias. On 20 benchmark data sets, we observe that PPSVM obtains accuracy results that are higher or comparable to those of canonical SVM using significantly fewer support vectors.

Original languageEnglish (US)
Pages (from-to)130-139
Number of pages10
JournalIEEE Transactions on Neural Networks
Issue number1
StatePublished - Jan 2008
Externally publishedYes


  • Density estimation
  • Kernel machines
  • Multiclass classification
  • Support vector machines (SVMs)

ASJC Scopus subject areas

  • Software
  • Computer Science Applications
  • Computer Networks and Communications
  • Artificial Intelligence


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