Facial Asymmetry

Using facial landmark detection described in Section 5.1.1, an additional measurement that is made is that of facial asymmetry. Frame-wise and overall asymmetry in landmarks on the left vs. right side of the face is quantified and saved in the following raw and derived variables.

Raw Variables

Variable	Description
fac_asymmaskmouth	Mouth asymmetry. Frame-wise asymmetry in the mouth area.
fac_asymmaskeye	Eye asymmetry. Frame-wise asymmetry in the eye area.
fac_asymmaskeyebrow	Eyebrow asymmetry. Frame-wise asymmetry in the Eyebrow area.
fac_asymmaskcom	Overall asymmetry. Frame-wise asymmetry across the face.

Derived Variables

Variable	Description
fac_asymmaskmouth_mean	Mouth asymmetry mean across the video.
fac_asymmaskmouth_std	Mouth asymmetry standard deviation across the video.
fac_asymmaskeye_mean	Eye asymmetry mean across the video.
fac_asymmaskeye_std	Eye asymmetry standard deviation across the video.
fac_asymmaskeyebrow_mean	Eyebrow asymmetry mean across the video.
fac_asymmaskeyebrow_std	Eyebrow asymmetry standard deviation across the video.
fac_asymmaskcom_mean	Overall asymmetry mean across the video.
fac_asymmaskcom_std	Overall asymmetry standard deviation across the video.