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Table 1 Signal extracted from FaceLab

From: Feature selection for driving fatigue characterization and detection using visual- and signal-based sensors

Signal Description
\(e_{\text{l,r}}\) Eye closure (left and right)
\(c_{\text{l,r}}\) Eye closure confidence (left and right)
Blink-freq Blink frequency
Blink-dur Average blink duration
PERCLOS Percentage eyelid closure at 75%
\(\varphi , \psi \) Gaze rotation: pitch, yaw angle
Sac Saccade
\(\text{P}\_\text{diam}_{\text{l,r}}\) Pupil diameter (left and right)
\(Q_{0,1,2,3}\) Head rotation: quaternions