A novel contactless aliveness-testing (CAT) fingerprint sensor

Lirong Wang, Rania H. Abd El-Maksoud, Jose M. Sasian, William P. Kuhn, Kathleen Gee, Valorie S. Valencia

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

12 Scopus citations


A contactless fingerprint sensor provides deformation-free, high-quality fingerprint images and offers users a cleaner and more comfortable measurement environment. Here we propose and design an innovative prototype optical, contactless, compact, fingerprint sensor that quickly produces high-quality, high-contrast interoperable fingerprint images. A proofof- concept contactless, aliveness-testing (CAT) fingerprint sensor, which is connected to a PC via a firewire cable, was constructed and is currently operating in our laboratory. The CAT sensor affords a more user-friendly interface compared to existing contactless fingerprint sensors and also provides robust aliveness testing and spoof detection. In this paper, we present the imaging system design concepts, finger aliveness detection techniques, and the user-friendly interface approach. Various fingerprint matching results using the CAT sensor device are also presented and discussed.

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


  • aliveness
  • contactless
  • fingerprint sensor
  • spoofing
  • touchless
  • usability
  • user interface

ASJC Scopus subject areas

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


Dive into the research topics of 'A novel contactless aliveness-testing (CAT) fingerprint sensor'. Together they form a unique fingerprint.

Cite this