Table 3.

Facial expressiveness vector d_fe.

Variable	Element of the Face	Action Units (AUs)
EB	Eyebrows	{AU1, AU4, none}
Ch	Cheeks	{AU6, none}
LE	Lower Eyelids	{AU7, none}
LC	Lip Corners	{AU12, AU15, none}
CB	Chin Boss	{AU17, none}
MF	Mouth's Form	{AU20, AU23, none}
MA	Mouth's Aperture	{AU24, AU25, none}