Wednesday, September 12, 2007

Holographic displays at Siggraph 2007

Holovizio DisplayA 3D display that allows viewers to see a 3D image on the screen, as they would see in reality has been on display at SIGGRAPH 2007, the Exhibition on Computer Graphics and Interactive Techniques, in the Emerging Technologies section.

Main features of this innovative system are:

  • No glasses needed, the 3D image can be seen with unassisted naked eye
  • Viewers can walk around the screen in a wide field of view seeing the objects and shadows moving continuously as in the normal perspective. It is even possible to look behind the objects, hidden details appear, while others disappear (motion parallax)
  • Unlimited number of viewers can see simultaneously the same 3D scene on the screen, with the possibility of seeing different details
  • Objects appear behind or even in front of the screen like on holograms
  • No positioning or head tracking applied
  • Spatial points are addressed individually
Holovizio LogoOptical illusions were offered up by a 3D wide-screen display called Holovizio, which creates giant images resembling holograms.
But instead of using lasers, 64 digital projectors are arranged behind the screen, and are programmed to illuminate it together, in order to build up the 3D image.

The effect works across a broader range of angles than a conventional hologram, allowing several people to view it at once. A hand-tracking system also lets viewers interact with the display, turning the image upside down or back-to-front.

This was the first practical demonstration of a system capable of computing and displaying the 3D geometry, texture, and dynamics of a complex object model in real time and creating accurate, interactive, three-dimensional, animated (up to 25 fps) images in true 3D with full, observer-independent, continuous parallax within a large workspace.

External Links:
Siggraph 2007

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