Abstract: A gaze direction determining system and method is provided. A two-camera system may detect the face from a fixed, wide-angle camera, estimates a rough location for the eye region using an eye detector based on topographic features, and directs another active pan-tilt-zoom camera to focus in on this eye region. A eye gaze estimation approach employs point-of-regard (PoG) tracking on a large viewing screen. To allow for greater head pose freedom, a calibration approach is provided to find the 3D eyeball location, eyeball radius, and fovea position. Both the iris center and iris contour points are mapped to the eyeball sphere (creating a 3D iris disk) to get the optical axis; then the fovea rotated accordingly and the final, visual axis gaze direction computed.

Abstract: Devices and methods for controlling an electronic system are provided. An embodiment of a device comprises a spring having a first end with a first handle and a second end with a second handle. A first sensor detects movement of the first end and a second sensor detects movement of the second end. Each sensor provides a control signal to the electronic system such that the electronic system can act according to the varying control signals. A method comprises providing a spring-based musical instrument and providing a computer having a speaker. The spring is altered by the musician in order to generate control signals to the computer. Sound is generated by the speaker and varied by the computer according to the received control signals.