| 摘要 |
A multiple participant interactive system that includes a projection screen (11), a projector (13) for projecting polarized light onto the imaging surface to produce a visible image on the imaging surface, a plurality of light pointers (15) for projecting respective non-polarized beams of light onto the projection screen to produce visible spots on the projection screen, a video detector (17) for detecting the visible spots on the projection screen and providing a video output that represents the visible spots on the projection screen, a computer (21) for processing the video output of the video detector, and a video source (23) which is controlled by the computer and provides a video input to the projector. |
