Eye Gaze Directionality

Eye gaze directionality is another output we get from OpenFace. The variables below allow for measurements of eye gaze behavior.

Raw Variables

Variable	Description
mov_lefteyex	x coordinate of the left eye at the current video frame.
mov_lefteyey	y coordinate of the left eye at the current video frame.
mov_lefteyez	z coordinate of the left eye at the current video frame.
mov_righteyex	x coordinate of the right eye at the current video frame.
mov_righteyey	y coordinate of the right eye at the current video frame.
mov_righteyez	z coordinate of the right eye at the current video frame.
mov_leyedisp	Euclidean displacement in the left eye gaze at the current video frame; this tells the overall movement in eye gaze direction in each frame.
mov_reyedisp	Euclidean displacement in the right eye gaze at the current video frame; this tells the overall movement in eye gaze direction in each frame.

Derived Variables

Variable	Description
mov_lefteyex_mean	Mean x coordinate of the left eye i.e. the average of the vector mov_lefteyex.
mov_lefteyex_std	Standard deviation of x coordinate of the left eye i.e. the standard deviation of the vector mov_lefteyex.
mov_lefteyey_mean	Mean y coordinate of the left eye i.e. the average of the vector mov_lefteyey.
mov_lefteyey_std	Standard deviation of y coordinate of the left eye i.e. the standard deviation of the vector mov_lefteyey.
mov_lefteyez_mean	Mean z coordinate of the left eye i.e. the average of the vector mov_lefteyez.
mov_lefteyez_std	Standard deviation of z coordinate of the left eye i.e. the standard deviation of the vector mov_lefteyez.
mov_righteyex_mean	Mean x coordinate of the right eye i.e. the average of the vector mov_righteyex.
mov_righteyex_std	Standard deviation of x coordinate of the right eye i.e. the standard deviation of the vector mov_righteyex.
mov_righteyey_mean	Mean y coordinate of the right eye i.e. the average of the vector mov_righteyey.
mov_righteyey_std	Standard deviation of y coordinate of the right eye i.e. the standard deviation of the vector mov_righteyey.
mov_righteyez_mean	Mean z coordinate of the right eye i.e. the average of the vector mov_righteyez.
mov_righteyez_std	Standard deviation of z coordinate of the right eye i.e. the standard deviation of the vector mov_righteyez.
mov_leyedisp_mean	Mean euclidean displacement in the left eye gaze over the course of the video.
mov_leyedisp_std	Standard deviation of euclidean displacement in the left eye gaze over the course of the video.
mov_reyedisp_mean	Mean euclidean displacement in the right eye gaze over the course of the video.
mov_reyedisp_std	Standard deviation of euclidean displacement in the right eye gaze over the course of the video.