Human action recognition is an important topic in com- puter vision. The task of recognizing human actions poses several challenges. Human action is extremely diverse, and to build a system that can be used to suc- cessfully identify any type of action is a serious prob- lem indeed. An interesting fact about human activity is the inherent similarity in the way actions are car- ried out. That is, people sit, stand, walk, bend down and get up in a more or less similar fashion, assuming, of course, there is no impediment in the performance of these actions. An important part of human activ- ity recognition has to do with tracking the body parts. Among the various body parts, it is the head of the subject that is most distinctive in its