Patent ID: 7683881

Claim:
A computer presentation system for generating commands for remotely controlling a presentation computer based on a plurality of user selectable properties of an optical cursor generated by a hand-held pointer and projected onto a screen displaying output images projected onto the screen from the presentation computer, comprising in combination: an optical projector coupled to the presentation computer for projecting images output from the computer onto the screen; an optical pointer for projecting an image of a control cursor characterized by a primary image attribute, the primary image attribute being a predetermined image repetition rate and independent of control cursor projection angle limitations as well as presentation background image limitations, and the control cursor being characterized by one or more secondary image attributes, each secondary image attribute being encoded with a command corresponding to a specific computer operation, and the image properties of the primary image attribute and secondary image attributes are mutually exclusive with respect to each other; a camera for capturing images projected onto the screen; and an image processor connected in communication with the camera for processing the captured images to (a) detect the control cursor on the basis of the primary image attribute of the control cursor, (b) determine the position of the control cursor relative to output from the presentation computer, and (c) generate a command signal for output to the presentation computer based on one or more of the secondary image attributes, subject to the condition that the presence of the primary image attribute is detected in the image of the control cursor.