360 degree light field display

The display consists of a high-speed video projector, a spinning mirrorcovered by a holographic diffuser, and FPGA circuitry to decodespecially rendered DVI video signals. The display uses a standardprogrammable graphics card to render over 5,000 images per second ofinteractive 3D graphics, projecting 360-degree views with 1.25 degreeseparation up to 20 updates per second. We describe the system'sprojection geometry and its calibration process, and we present amultiple-center-of-projection rendering technique for creatingperspective-correct images from arbitrary viewpoints around thedisplay.

Our projection technique allows correct vertical perspectiveand parallax to be rendered for any height and distance when theseparameters are known, and we demonstrate this effect with interactiveraster graphics using a tracking system to measure the viewer's heightand distance. We further apply our projection technique to the displayof photographed light fields with accurate horizontal and verticalparallax.

Source: swissmiss.typepad.comAdded: 26 September 2007