Structure-adaptive anisotropic filter applied to fingerprints

Shlomo Greenberg, Daniel Kogan

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The propose a modified structure-adaptive anisotropic filter, which uses local intensity orientation and an anisotropic measure to control the shape of the filter kernel, and apply it to fingerprints. The modification is made in the frequency domain by converting the common structure-adaptive anisotropic filter from a low-pass filter to a band-pass one. We show that the modified structure-adaptive anisotropic filter can be effectively applied to applications, such as fingerprint image enhancement, in which the oriented patterns in local neighborhood form a sinusoidal-shaped plane wave with a well-defined frequency and orientation. The performance of the proposed structure-adaptive anisotropic filter is compared to some other filters used for minutiae detection. The proposed filter shows some improvement in terms of computational time and efficient.

Original languageEnglish
Article number127004
JournalOptical Engineering
Volume44
Issue number12
DOIs
StatePublished - 1 Dec 2005

Keywords

  • Gabor filters
  • Image enhancement
  • Structure-adaptive anisotropic filters

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • General Engineering

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