For our
application, the hand segmentation has been carried out using a low computational cost method that performs
well in real time. The method is based in a probabilistic model of the skin-colour pixels distribution. Then, it
is necessary to model the skin-colour of the user’s hand. The user places part of his hand in a learning square
as shown in Fig. 2. The pixels restricted in this area will be used for learning the model. Next, the selected
pixels are transformed from the RGB-space to the HSL-space for taking the chroma information: hue and
saturation