Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

IREX IV: Part 1, Evaluation of Iris Identification Algorithms



George W. Quinn, Patrick J. Grother, Mei L. Ngan, James R. Matey


IREX IV aims to provide a fair and balanced scientific evaluation of the performance of automated iris recognition algorithms. IREX IV evaluated the performance of 66 identification (i.e. one-to-many matching) algorithms submitted by 12 companies and universities. IREX IV investigated the use of cost models for application-specific algorithm optimization. The goal is to see if algorithm developers can improve performance when given advanced knowledge of the costs of identification errors.
NIST Interagency/Internal Report (NISTIR) - 7949
Report Number


IREX, iris
Created July 11, 2013, Updated November 10, 2018