Real time vision for human computer interaction is an invaluable reference for hci researchers in both academia and industry and a useful supplement for advanced level courses in hci and computer vision. Computer vision and pattern recognition continue to play a dominant role in the hci realm however computer vision methods often fail to become pervasive in the field due to the lack of real time robust algorithms as well as novel and convincing applications. Real time vision for human computer interaction is an invaluable reference for hci researchers in both academia and industry and a useful supplement for advanced level courses in hci and computer vision. The need for natural and effective human computer interaction hci is increasingly important due to the prevalence of computers in human activities computer vision and pattern recognition continue to play a dominant role in the hci realm however computer vision methods often fail to become pervasive in the field due to the lack of real time robust algorithms and novel and convincing