METHOD AND APPARATUS FOR INHIBITING PROJECTION OF SELECTED AREAS OF A PROJECTED IMAGE

摘要

A video projector (6) shows the desired scene on a projection screen (3). An infrared source (7) close to the video projector uniformly floods the projection screen with non- visible infrared radiation. An infrared sensitive camera (5) observes the projection screen and sees only the uniform illumination of the screen. Upon entry of a subject (4) into the projected video image, the infraged reflected from the subject will not match that of the projection screen and thus the subject area is identified. All pixels of the projected scene, in the area occupied by the subject, are inhibited before reaching the video projector. The subject may then look directly at an audience without being blinded by the projector.