NIST IREX
Definition
NIST Iris Exchange: the series of iris recognition algorithm evaluations conducted by the National Institute of Standards and Technology since 2009, providing the published, testable error-rate data relied upon in Daubert admissibility analyses.
- Full name
- NIST Iris Exchange
- Running since
- 2009
- Conducted by
- National Institute of Standards and Technology
- Legal use
- Published error-rate data cited in Daubert analyses
Common questions
Why does published, testable error-rate data matter specifically for Daubert admissibility?+
One of the Daubert factors is whether a technique's known or potential error rate has been established, and IREX provides independently measured, publicly available error-rate figures for iris recognition algorithms, which an expert can cite rather than relying on vendor claims alone.
Does IREX test the same algorithms used in Aadhaar and DOD deployments?+
IREX evaluates algorithms submitted by vendors and developers generally, and specific deployments such as Aadhaar or DOD systems may use algorithms that have been evaluated in IREX rounds, though a given deployment's exact algorithm version should be confirmed rather than assumed identical to a tested one.
What does an IREX evaluation actually measure?+
It measures matching accuracy, including false-match and false-non-match rates, and processing performance of iris recognition algorithms under standardised test conditions and datasets, allowing comparison across different vendors' systems.
Related terms
- DOD ABIS
- US Department of Defense Automated Biometric Identification System, administered by the Defense Forensics and Biometrics Agency, holding iris, fingerprint, face and DNA...
- Hamming Distance (HD)
- The fraction of bit positions where two IrisCodes disagree, computed only over mutually unmasked bits. Genuine pairs centre around HD 0.10-0.15; impostor...
- HIIDE
- Hand-held Interagency Identity Detection Equipment: a handheld iris and fingerprint capture device used by US military forces in Iraq and Afghanistan for...
- Integro-Differential Operator
- Daugman's boundary-detection method: it maximises the magnitude of the line-integral intensity gradient around circular paths, locating the pupillary and limbic boundaries of...
- IrisCode
- The 2048-bit binary template produced by quantising the phase of 2D Gabor wavelet responses across the normalised iris strip. Phase encoding provides...
- Puttaswamy V. Union of India (2018)
- Supreme Court of India judgment upholding Aadhaar's constitutional validity while classifying iris and other biometric data as sensitive personal information within the...
- Rubber-Sheet Model
- The coordinate transform that maps the annular iris region (between pupillary and limbic circles) to a normalised rectangular strip of fixed dimensions,...
- UIDAI
- Unique Identification Authority of India, the statutory body created by the Aadhaar Act 2016 that operates the world's largest biometric identity system,...
- Usable Bit Fraction
- The proportion of IrisCode bits not masked for eyelid, eyelash, or specular reflection occlusion. Values below 0.7 reduce match confidence; values below...