艾滋病锻炼身体:星球大战中的莉亚公主三维全息图像现实版（Video + Text）

MIT媒体实验室的一个项目，利用普通笔记本，XBOX360和普通显卡及激光做出了真实的全息实时图像，当然解析度还不高，刷新速度也不够，这是他们下一步的方向。
Kinect used to create holographic video of Princess Leia
16:40 24 January 2011
Jeff Hecht, contributor
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The holographic images are still rather fuzzy. But just a couple of months after the firstdemonstration of holographic telepresence, the frame rate has jumped a factor of 30, from one frame every two seconds to an impressive 15 frames per second.
Michael Bove's group at the MIT Media Lab achieved the feat by hacking the camera sensor from a Kinect gesture-recognition system for Microsoft's Xbox360and crunching data with standard graphics chips.To give their demonstration extra flair, graduate student Edwina Portocarrero dressed up as Princess Leia from Star Wars and recreated the famous holographic projection of a plea for help from the movie.
The real holographic image couldn't match the resolution achieved by special effects in the movie, Bove says, but adds, "Princess Leia wasn't being transmitted in real time. She was stored" in R2-D2's memory.
Bove's group reported the new system yesterday at the Practical Holography XXV conferencein San Francisco.
Like the earlier demonstration, the Media Lab demonstration used computers to generate three-dimensional profiles of the scene and the data needed to project the hologram.
Bove's group started with an array of 16 low-resolution infrared cameras, spaced evenly along a metre-long line. Computer processing combined the images to generate the data needed for the 3D holographic projector at the rate of 15 frames per second.
The next step came in late December when they bought their first Kinect, and hacked the camera system made by PrimeSense of Israel, which records three-dimensional profiles by projecting a grid of laser light onto a scene. This approach, called structured light, yields resolution of 640 by 480 pixels, three times higher than each infrared camera. That was good enough to record the holographic Princess Leia scene shown here.
Both the Kinect and the processing chips are commercial products, readily available for a couple hundred dollars. However, the holographic projector itself is a different matter. It's a complex system custom-built at the Media Lab more than a decade ago by students of Stephen Benton, a pioneer of holographic imaging who died in 2003, which can display images much faster than the special photorefractive screen developed for the display demonstrated last year at the University of Arizona.
"If the software gets faster we can show up to 30 holograms per second," Bove told New Scientist. And his group is working on a more compact and higher resolution holographic projector which he expects will be cheaper to manufacture.