Table 1. Accuracy comparison.

Methods	EER (%)	d′
Traditional Gaussian skin-color [9]	9.0	2.95
2D-Otsu [10]	4.3	3.46
Ellipse skin-color [11]	11.1	2.71
Twice adaptive skin-color [12]	2.4	4.30
Traditional ASM [13]	4.6	3.37
Our method	1.9	4.60