Table 2.

Recorded video sequences covered by the study.

Video No.	Room Settings	Participant’s Details	Camera Parameters
1	room 1: artificial ceiling fluorescent light + natural light (dusk, medium lighting) from a one window on the left side + light from the one computer screen	participant 1: male, ~34 years old	camera-to-face distance ~50 cm, gain = 128, white balance off
2	room 1: artificial ceiling fluorescent light + natural light (dusk, medium lighting) from a one window on the left side + light from the one computer screen	participant 2: male, ~22 years old	camera-to-face distance ~50 cm, gain = 128, white balance off
3	room 2: daylight (cloudy, poor lighting): a one roof window on the left, and a second window in the back on the right + fluorescent lamps in the back (2 m) + ceiling fluorescent lamps + right-side table lamp + light from two computer screens	participant 3: male, ~44 years old	camera-to-face distance ~50 cm, gain = 128, white balance off
4	room 2: daylight (cloudy, medium lighting): a one roof window on the left, and a second window in the back on the right + fluorescent lamps in the back (2 m) + ceiling fluorescent lamps + light from two computer screens	participant 3: male, ~44 years old	camera-to-face distance ~50 cm, gain = 128, white balance on
5	room 3: daylight (sunny, strong lighting): a one window in the front + light from the one computer screen;	participant 3: male, ~44 years old	camera-to-face distance ~60 cm (computer screen slightly lower – user has to gaze slightly downwards), gain = 100, white balance on
6	room 4: nighttime, artificial light only (ceiling lamps, table lamps, led curtain lamps + light from the one computer screen);	participant 3: male, ~44 years old	camera-to-face distance ~50 cm (computer screen slightly lower – user has to gaze slightly downwards), gain = 128, white balance on
7	room 3: daylight (cloudy, medium lighting): a one window in the front + light from the one computer screen;	participant 4: female, ~42 years old	camera-to-face distance ~60 cm (computer screen slightly lower – user has to gaze slightly downwards), gain = 128, white balance on
8	room 2: daylight (cloudy, poor lighting): a one roof window on the left, and a second window in the back on the right + fluorescent lamps in the back (2 m) + light from two computer screens;	participant 3: male, ~44 years old	camera-to-face distance ~50 cm, gain = 100, white balance off
9	room 5: artificial ceiling fluorescent light + natural light (dusk, medium lighting) from a one window on the right side + right side bulb lamp + light from the one computer screen;	participant 5: male, ~23 years old	camera-to-face distance ~60 cm, gain = 128, white balance on