Oculomotor Plant Characteristics: The Effects of Environment and Stimulus

This paper presents an objective evaluation of the effects of environmental factors, such as stimulus presentation and eye tracking specifications, on the biometric accuracy of oculomotor plant characteristic biometrics. This paper examines the largest known data set for eye movement biometrics, with eye movements recorded from 323 subjects over multiple sessions. Six spatial precision tiers (0.01°, 0.11°, 0.21°, 0.31°, 0.41°, and 0.51°), six temporal resolution tiers (1000, 500, 250, 120, 75, and 30 Hz), and three stimulus types (horizontal, random, and textual) are evaluated to identify acceptable conditions under which to collect eye movement data. The results suggest the use of eye tracking equipment providing at least 0.1° spatial precision and 30-Hz sampling rate for biometric purposes, and the use of a horizontal pattern stimulus when using the 2-D oculomotor plant model developed by Komogortsev et al.