## Abstract

We present an adaptive metric learning vector quantization procedure based on the discrete-cosine transform (DCT) for accurate face recognition used in multimedia application. Since the set of learning samples may be small, we employ a mixture model of prior distributions. The model selection method, which minimizes the cross entropy between the real distribution and the modeled one, is presented to optimize the mixture number and local metric parameters. The structural risk minimization is used to facilitate an asymptotic approximation of the cross entropy for models of fixed complexity. We also provide a formula to estimate the model complexity derived from the minimum description length criterion. The structural risk minimization method proposed achieves an recognition error rate of 2.29% using the ORL database, which is better than previously reported numbers using the Karhunen-Loeve transform convolution network, the hidden Marcov model and the eigenface model.

Original language | English |
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Title of host publication | Neural Networks for Signal Processing - Proceedings of the IEEE Workshop |

Place of Publication | Piscataway, NJ, United States |

Publisher | IEEE |

Pages | 521-530 |

Number of pages | 10 |

Publication status | Published - 1997 |

Externally published | Yes |

Event | Proceedings of the 1997 7th IEEE Workshop on Neural Networks for Signal Processing, NNSP'97 - Amelia Island, FL, USA Duration: 1997 Sep 24 → 1997 Sep 26 |

### Other

Other | Proceedings of the 1997 7th IEEE Workshop on Neural Networks for Signal Processing, NNSP'97 |
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City | Amelia Island, FL, USA |

Period | 97/9/24 → 97/9/26 |

## ASJC Scopus subject areas

- Signal Processing
- Software
- Electrical and Electronic Engineering