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  • Research Article
  • Open Access

Unconstrained Iris Acquisition and Recognition Using COTS PTZ Camera

EURASIP Journal on Advances in Signal Processing20102010:938737

  • Received: 2 December 2009
  • Accepted: 19 July 2010
  • Published:


Uniqueness of iris patterns among individuals has resulted in the ubiquity of iris recognition systems in virtual and physical spaces, at high security facilities around the globe. Traditional methods of acquiring iris patterns in commercial systems scan the iris when an individual is at a predetermined location in front of the scanner. Most state-of-the-art techniques for unconstrained iris acquisition in literature use expensive custom equipment and are composed of a multicamera setup, which is bulky, expensive, and requires calibration. This paper investigates a method of unconstrained iris acquisition and recognition using a single commercial off-the-shelf (COTS) pan-tilt-zoom (PTZ) camera, that is compact and that reduces the cost of the final system, compared to other proposed hierarchical multicomponent systems. We employ state-of-the-art techniques for face detection and a robust eye detection scheme using active shape models for accurate landmark localization. Additionally, our system alleviates the need for any calibration stage prior to its use. We present results using a database of iris images captured using our system, while operating in an unconstrained acquisition mode at 1.5 m standoff, yielding an iris diameter in the 150–200 pixels range.


  • Custom Equipment
  • Face Detection
  • Active Shape Model
  • Landmark Localization
  • Iris Recognition

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Authors’ Affiliations

Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213, USA


© S. Venugopalan and M. Savvides. 2010

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.