US Patent 9268400 Controlling a graphical user interface

Apparatus and methods for enabling a user to interact with movable control elements of a graphical user interface (GUI) by moving a hand 12, or one or more fingers 16, 18 of said hand 12 relative to a thumb 14 on said hand, in which the apparatus comprises: a camera adapted to be releasably mounted to said hand, and a processor adapted to receive signals representative of successive images captured by the camera during movement of said hand, or movement of the finger(s) of said hand relative to said thumb, to analyze said successive images to determine said movement, and to communicate with the GUI to control elements thereof in accordance with the determined movement.