Abstract: Embodiments are disclosed of an apparatus including a digital camera to capture video or a sequence of still images of a user's hand. One or more processors are coupled to the digital camera to process the video or the sequence of still images to produce a digital representation of the user's hand, to determine the gesture and motion of the user's hand from the digital representation, and to correlate the gesture or the gesture/motion combination to a user interface command. A user interface controller is coupled to receive the user interface command from the one or more processors. A display is coupled to the user interface controller. The user interface controller causes a set of one or more user interface controls to appear on the display. The user interface command selects or adjusts one or more of the set of displayed user interface controls, and motion of the selected user interface control tracks the motion of the user's hand in substantially real time. Other embodiments are disclosed and claimed.