Multi-Projector Imagery on Curved Surfaces

(Right) Displayed with intensity correction. The parametric approach leads to accurate geometric registration and perceptually seamless images. (Embedded images are high-resolution. Please zoom with PDF browser.) Curved screens are increasingly being used for high-resolution im-mersive visualization environments. We describe a new technique to display seamless images using overlapping projectors on curved quadric surfaces such as spherical or cylindrical shape. We de-fine a new quadric image transfer function and show how it can be used to achieve sub-pixel registration while interactively displaying two or three-dimensional datasets. Current techniques for automat-ically registered seamless displays have focused mainly on planar displays. On the other hand, techniques for curved screens cur-rently involve cumbersome manual alignment to make the installa-tion conform to the intended design. We show a seamless real-time display system and discuss our methods for smooth intensity blend-ing and efficient rendering