Iris template ageing debate rolls on…


Can iris templates, which are used in a multitude of large-scale biometric systems around the world, age or not? It is an important question, and researchers just cannot seem to agree on the answers.

A significant, but controversial, test performed by NIST (called IREX VI) states plainly: “We find no evidence of a widespread iris ageing effect.”

The controversy arises because previous results by different research groups analyzing different datasets all report observing a significant iris template ageing effect.

So who is right?

No doubt the debate will continue to rage, and sensitivities will continue to run high. But a new report has been published by Kevin Bowyer and Estefan Ortiz of the Department of Computer Science and Engineering, University of Notre Dame, that attempts to explain why academic researchers have been achieving seemingly incompatible results.

The new report says that IREX VI uses a definition of “iris aging” that is restricted to only a subset of ISO-definition template aging. More alarmingly, the report also claims that in terms of regression analysis, IREX VI makes methodological errors in obtaining what it calls its “best estimate of iris recognition aging”.

According to the researchers: “The OPS - XING dataset that IREX VI analyzes for its ‘best estimate of iris recognition aging’ is truncated to remove all matches with Hamming distance greater than 0.27. To avoid bias in analyzing such a dataset, a “truncated regression” technique must be used. IREX VI fails to do so, and therefore its ‘best estimate of iris recognition aging” and other results are biased low.”

Other factors are also presented in the report that may have impacted NIST’s results.

According to the report, IREX VI does not attempt to study the same phenomenon studied in previous research, and so on that basis alone it cannot refute results of previous research.

Bowyer and Ortiz also say that the methodological errors mean that the IREX VI analysis should be re-done with appropriate techniques and controls to obtain unbiased results.

To read the full report click here.

Related articles

Subscribe to our free newsletter
Follow us on Twitter
Join us on LinkedIn

Article Comments

No reviews have been submitted

Please add a comment on this article from the Add Comment below.

Please Login or Register.

Login or Register

This article appears in :-

Iris debate rolls on - NIST requested to redo analysis
Iris debate rolls on - NIST requested to redo analysis

Other Site News

Morpho signs biometric eBorder contract with the UAE 29 January 2015

Morpho (Safran) has signed a major eBorder deal with the United Arab Emirates that includes the implementation of a fully integrated multi-biometric border control system, as well as 96 e-Gates and 94 e-Counters, in five major airports.  

IriTech reveals outdoor iris scanning tech for mobiles 14 January 2015

IriTech has developed a new technology to capture iris images in bright sunlight which could prove crucial as manufacturers look to embed iris scanners on mobile devices.

ViewSonic gives glimpse of smartphone with iris scanner 09 January 2015

ViewSonic has stolen a march on major handset manufacturers by revealing plans to debut a smartphone with iris recognition.

Eyelock reveals first laptop using its iris scanner tech 07 January 2015

Eyelock has unveiled a pre-production laptop that integrates its EyeLock ID technology.

Can Intel deal or biometrics save Google Glass? 02 December 2014

Interest in Google Glass has been boosted by reports that Intel will power a new version, and the filing of a patent that would add an iris, retina or eye-vein scanning capability to the device.

More articles >>
Share |

Sponsored Links

id3 Technologies Id3 Technologies is a biometrics expert company providing winning awards algorithms, biometrics devices and ID systems. Established since 1990 and originally involved in electronics, id3 is a biometrics veteran developing innovative, secure and convenient solutions like match on card, multimodal enrolment, AFIS and ABIS.
Speed Identity Speed Identity is an innovative Swedish technology company supplying integrated biometric data capture solutions. The new Speed Capture G3 is the first cross-functional form factor.