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Visual technology enables brain to learn in new ways
Date:3/21/2008

d at Tufts' School of Engineering but available to the entire university, the seamless wall features a high resolution display system that uses rear projection in order to enhance the amount of detail that is visible. Most visualization systems use several projectors at once or multiple, tiled screens to display images. Tufts' uses just a single screen with close to 9 megapixels resolution (4,096 x 2,169 pixels) and two projectors (with overlapping fields of projection) to create high- resolution images and animation.

By using a single screen and two projectors, Tufts is able to produce ultra-high resolution images -- including 3-D images -- that appear smoother and without seams. Images projected at a higher resolution reveal fine, minute details that would be imperceptible on a screen with fewer pixels or tiled images. The VisWall's projectors are equipped with Infitec filters to minimize ghosting, in which an image appears to include elements of another image. Ghosting is a common drawback with conventional polarized filters.

In addition, the Tufts system can combine the sense of touch with that of sight through haptic devices that convey varying levels of resistance to the user when he or she touches graphical objects on the display wall. This also allows Tufts researchers to create virtual environments, such as the human body for surgical simulations that can be physically manipulated and transformed.

Order in Chaos

Tufts faculty have already discovered applications of the new technology. Mathematics Professor Boris Hasselblatt made a surprising find while viewing a mathematical model of butterfly populations as they fluctuated through successive generations. The model, used for research in dynamical systems theory, is based on a simple formula and is well-known to anyone familiar with chaos theory.

Visualizing the large population dataset with the 14-foot-wide, high-resolution graphical display enabled H
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Contact: Alex Reid
alexander.reid@tufts.edu
617-627-4173
Tufts University
Source:Eurekalert

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