1. A method for automatically tracking an object to keep the object in the field of view of a video camera, and create an augmented reality display comprising the image from the video camera combined with computer-generated graphics to create an augmented reality display, the method comprising: resolving the camera's field of view; determining the location of an object to be tracked relative to the camera's field of view; in response to the determined location of the object, moving the camera to maintain the object in the camera's field of view; using a computer to generate a graphical image representing unseen information that corresponds to the camera's viewpoint; and augmenting the video image with the graphical image, to create an augmented-reality image having the tracked object therein, for presentation to a user.