Eye Gaze Estimation Based on Stacked Hourglass Neural Network for Aircraft Helmet Aiming

Table 2

Performance comparison with relevant research.

Methods	Error/degree	Number of light sources	Head movement range
Skodras et al. [31]	1.42 ± 1.35	0	Fixed
Cheung et al. [32]	2.27	0	15.5 × 15.5 × 15.5
Arar et al. [33]	1.15	5	Free
Li et al. [34]	3.0 ~ 4.5	0	Free
Wang et al. [29]	1.3	4	Free
Proposed	2.00	0	Free