Table 1.

Variants for the outlier detection algorithm, with their mean values and corresponding standard deviation

	Variant	μ	δ
1	α(Eye)/Σ(Eye)	138.426	12.412
2	β(Eye)/Σ(Eye)	138.214	13.345
3	α(Lip)/Σ(Lip)	150.725	9.752
4	Σ(LFace)/ Σ(RFace)	0.962	0.186
5	Σ(LEye)/ Σ(REye)	0.958	0.071
6	H(Face)	2.233	3.141