Abstract: An input device having a movable puck and display screen is disclosed. The puck is confined to move on a puck surface having a puck field of motion defined thereon. The puck field of motion is divided into a pointing region and a function region. A controller determines a position for the puck within the field of motion. The display screen displays a two-dimensional scene and a cursor that moves within the scene in a manner controlled by the position of the puck when the puck is in the pointing region. The controller causes the scene to change when the puck is in the function region. A deformable barrier that inhibits the movement of the puck into the function region can be used to prevent inadvertent changing of the display scene. The inhibition is overcome by a user applying additional force to the puck in a direction parallel to the surface.

Abstract: After image capture, scene parameters are analyzed, e.g. lux, flicker, or world estimation. A best guess illuminant for the scene parameters is determined. At this point, the white balancing coefficients corresponding to that illuminant may be applied.

Abstract: Eye detection is used as the basis for providing power management or other variations of operational parameters of a controlled device. The system includes an imager and eye detection processing which cooperate to detect light received from a person's eye. The eye detection processing generates an output that can be used for determinations regarding presence of one or more persons or presence of a specific person. This output is used as the basis for switching the controlled device between at least two power consumption states. Eye detection may also be used to allow a person to actively adjust operational conditions of the controlled device, since unnatural eye blinking patterns may be associated with particular commands.