Enhancing performance and user convenience of multi-biometric verification systems

Md S. Hossain, Vir V. Phoha

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


A multi-biometric verification system lowers the verification errors by fusing information from multiple biometric sources. Information can be fused in parallel or serial modes. While parallel fusion gives a higher accuracy, it may suffer from a serious problem of taking a longer verification time. Serial fusion can alleviate this problem by allowing the users to submit a subset of the available biometric characteristics. Unfortunately, several studies show that serial fusion may not reach the level of accuracy of parallel fusion. In this paper, we propose a fusion framework which combines the advantages of both parallel and serial fusion. The core of the framework is a new concept of “confident reject region” which incurs nearly zero verification error. We evaluate our framework by performing experiments on two multi-biometric verification systems built with NIST biometric scores set release 1. The experimental results show that our framework achieves a lower equal error rate and takes a shorter verification time than standard parallel fusion.

Original languageEnglish (US)
Pages (from-to)1569-1582
Number of pages14
JournalPattern Analysis and Applications
Issue number4
StatePublished - Nov 2021


  • Multi-biometric verification
  • Parallel fusion
  • Serial fusion
  • User convenience

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Artificial Intelligence


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