Owl and Lizard: Patterns of Head Pose and Eye Pose in Driver Gaze Classification
Lex Fridman, Joonbum Lee, Bryan Reimer, Trent Victor

TL;DR
This study investigates how head and eye pose estimation from monocular video can improve driver gaze classification, revealing individual differences in gaze strategies and the impact of eye movement on classification accuracy.
Contribution
It introduces a novel analysis of individual gaze strategies ('owl' vs. 'lizard') and quantifies how eye pose enhances gaze classification depending on these strategies.
Findings
Eye pose improves gaze classification more when head remains still.
Gaze strategies vary significantly between individuals.
Classification accuracy depends on the degree of eye versus head movement.
Abstract
Accurate, robust, inexpensive gaze tracking in the car can help keep a driver safe by facilitating the more effective study of how to improve (1) vehicle interfaces and (2) the design of future Advanced Driver Assistance Systems. In this paper, we estimate head pose and eye pose from monocular video using methods developed extensively in prior work and ask two new interesting questions. First, how much better can we classify driver gaze using head and eye pose versus just using head pose? Second, are there individual-specific gaze strategies that strongly correlate with how much gaze classification improves with the addition of eye pose information? We answer these questions by evaluating data drawn from an on-road study of 40 drivers. The main insight of the paper is conveyed through the analogy of an "owl" and "lizard" which describes the degree to which the eyes and the head move…
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