Despite recent developments in eye tracking technology, mobile
eye trackers (ET) are still expensive devices limited to a few hundred samples per second. High speed ETs (closer to 1 KHz) can
provide improved flexibility for data filtering and more reliable
event detection. To address these challenges, we present the Stroboscopic Catadioptric Eye Tracking (SCET) system, a novel approach
for mobile ET based on rolling shutter cameras and stroboscopic
structured infrared lighting. SCET proposes a geometric model
where the cornea acts as a spherical mirror in a catadioptric system,
changing the projection as it moves. Calibration methods for the
geometry of the system and for the gaze estimation are presented.
Instead of tracking common eye features, such as the pupil center,
we track multiple glints on the cornea. By carefully adjusting the
camera exposure and the lighting period, we show how one image
frame can be divided into several bands to increase the temporal
resolution of the gaze estimates. We assess the model in a simulated environment and also describe a prototype implementation
that demonstrates the feasibility of SCET, which we envision as
a step further in the direction of a mobile, robust, affordable, and
high-speed eye tracker.
BibTeX
@inproceedings{Borsato:2019:TLC:3314111.3319841,
author = {Borsato, Frank H. and Morimoto, Carlos H.},
title = {Towards a Low Cost and High Speed Mobile Eye Tracker},
booktitle = {Proceedings of the 11th ACM Symposium on Eye Tracking Research & Applications},
series = {ETRA '19},
year = {2019},
isbn = {978-1-4503-6709-7},
location = {Denver, Colorado},
pages = {16:1--16:9},
articleno = {16},
numpages = {9},
url = {http://doi.acm.org/10.1145/3314111.3319841},
doi = {10.1145/3314111.3319841},
acmid = {3319841},
publisher = {ACM},
address = {New York, NY, USA},
keywords = {catadioptric system, mobile eye-tracking, rolling shutter, stroboscopic lighting},
}