Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

IREX IV: Part 2 Compression Profiles for Iris Image Compression



George Quinn, Patrick Grother, Mei Ngan, Nick Rymer


The IREX IV evaluation builds upon IREX III as a performance test of one-to-many iris recognition. This report is the second part of the IREX IV evaluation, which specifically, evaluates the ability of automated iris recognition algorithms to match heavily compressed standard iris images and determines the optimal set of compression parameters for JP2 compression and the maximum capabilities for one-to-many matching.
NIST Interagency/Internal Report (NISTIR) - 7978
Report Number


IREX, iris, biometrics, compression


Quinn, G. , Grother, P. , Ngan, M. and Rymer, N. (2014), IREX IV: Part 2 Compression Profiles for Iris Image Compression, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online],, (Accessed April 17, 2024)
Created January 22, 2014, Updated October 12, 2021