Illumination scheme for high-contrast, contactless fingerprint images

Lirong Wang, Rania H. Abd El-Maksoud, José M. Sasian, Valorie S. Valencia

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Scopus citations


Illumination is critical to achieve high-contrast, contactless fingerprint images. In this paper, we report results of fingerprint imaging experiments performed under different illumination conditions. We studied how polarization states, illumination wavelength, detection wavelength, and illumination direction influence the contrast of fingerprint images. Our research findings provide a selection rule for optimum illumination and a basis for us to construct an illuminator that generates uniform illumination and high-contrast contactless fingerprint images.

Original languageEnglish (US)
Title of host publicationNovel Optical Systems Design and Optimization XII
StatePublished - 2009
EventNovel Optical Systems Design and Optimization XII - San Diego, CA, United States
Duration: Aug 3 2009Aug 4 2009

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherNovel Optical Systems Design and Optimization XII
Country/TerritoryUnited States
CitySan Diego, CA


  • LED
  • biometrics
  • contactless
  • contrast
  • fingerprints
  • illumination
  • polarization
  • uniformity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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