Head pose and eye gaze estimation is a hot research topic in computer vision as it is deeply related to someones intentions and attention. Despite many years of research, it remains a very difficult and largely unsolved problem in unconstrained environments. There have been several books on face recognition in which the head pose and eye gaze are only discussed independently. This book is the first to provide a comprehensive introduction to the head pose, eye gaze and their integration from a computational and implementation perspective. Face detection, a related topic, is also discussed....