Recognition using robust bit extraction

David C.L. Ngo, Alwyn Goh, Andrew B.J. Teoh

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We present a novel technique for extracting bits from the perceptually significant components of an image transformation, thus making the recognition of objects under nonideal conditions robust. Specifically, we describe five popular face recognition transform methods [including principal component analysis (PCA), linear discriminant analysis (LDA), wavelet transform, wavelet transform with PCA, and wavelet transform with Fourier-Mellin transform] with robust bit extraction enhancement for various numbers of bits extracted. The robustness guarantees that all similar face images will produce almost the same bits. This property is useful for generating cryptographic keys. The theoretical results are evaluated on the Olivetti Research Laboratory (ORL) face database, showing that the extended methods significantly outperform the corresponding standard methods when the number of extracted bits reaches 100.

Original languageEnglish
Article number043016
JournalJournal of Electronic Imaging
Issue number4
Publication statusPublished - 2005 Oct

Bibliographical note

Funding Information:
The authors acknowledge the financial support given by the Ministry of Science, Technology and Innovation through the IRPA grant. The authors would like to thank the reviewers for helpful comments.

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Computer Science Applications
  • Electrical and Electronic Engineering


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