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Creating shadowless images with front projection display systems - 1094

*Abstract

Overview

Front projection display systems are used for both entertainment and business, but they suffer from a fundamental problem--the user caneasily and inadvertently block the projector, creating shadows. Our invention solves this problem by removing displaysurface shadows in real-time to allow the projected image to appear unblemished.

Invention

UK researchers are developing a way to improve the quality of images generated by front projection display systems by removing in real time any shadows that fall upon the screen. By combining a series of cameras and projectors, this system determines relative device positions, derives a depth map for the display surface, and cooperatively renders a blended image that is correct for the user's viewing location. The results is an image that is free of shadows created by an obstruction between the projector and the screen.

Applications

entertainment
business environments
military

Advantages

real-time detection and removal of shadows caused by a blockage (such as a person or object) between a projector and a screen

IP Status: U.S. Patent no. 7,133,083

Country/Region: USA

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