Towards Driver's State Recognition on Real Driving Conditions

Table 2

The features used in this study and the code name assigned to each feature.

Source	Feature	Code
Physiological signals	Mean RR	F1
	Std of detrended RR	F2
	Proportion of RRV energy on very low frequency band (VLF)	F3
	Proportion of RRV energy on low frequency band (LF)	F4
	Proportion of RRV energy on high frequency band (HF)	F5
	LF/HF	F6
	Mean EDA level	F7
	First absolute differences	F8
	Mean Respiration Rate	F9
	RRV Detrended Fluctuation Analysis (DFA)	F10
	RRV Approximate Entropy	F11
	Respiration Spectrum Entropy	F12
	RRV Lyapunov Mean exponent	F13
	RRV Lyapunov Max exponent	F14
	HR (bpm)/Resp. Rate (bpm)	F15
Face Video	Mean Eye Activation	V1
	Std of Eye Activation	V2
	Std of Head Position	V3
	PERCLOS	V4
Environment	Weather conditions	S1
	Visibility	S2
	Traffic conditions	S3