Skin color models are further classified into three categories:
pixel based, Edge based and Region based models. Fig 4
shows pixel based skin color models. These are explicitly
defined skin color region, parametric methods and nonparametric
methods. Further parametric methods are divided
into two parts one is Gaussian model and second is mixture of
Gaussians (MOG) model.[9] Similarly Non-Parametric
methods are divided as Look up table and Baye’s skin
probability map model. [8].