Iris template ageing debate rolls on…

02/01/14

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

Singapore mulls iris scanners for border checkpoints 26 September 2014

Singapore, which already uses fingerprint scanning for border entry, is considering a “small-scale” test of iris scanners.

Vision-Box deploys eGates at Qatar's Hamad airport 15 September 2014

Border control firm say the eGates will streamline the entry process with high levels of security and efficiency

Bringing iris recognition to the masses: Delta ID raises $5m 05 September 2014

Delta ID, a company focused on bringing biometric authentication to mass-market computing devices, has announced it has closed a $5 million Series A financing from Intel Capital 

Gender in the eye of the beholder 05 August 2014

Is it possible to look into a person’s eyes and tell whether they’re male or female. Apparently so reveals new research into soft biometrics – and with quite some certainty!

Biometric eyeprint start up scores $6 million investment 10 July 2014

EyeVerify, a biometric company whose technology recognises smart phone users from the whites of their eyeballs, rather than their irises, has scored a major injection of funds.

More articles >>
Share |

Sponsored Links

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.
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.