Lounging on a sofa while watching a 3D movie is an exquisite pleasure for many film fans. Be that as it may, those nettlesome 3D glasses might diminish the fun somewhat. That's why television manufacturers are working on displays that can recreate the spellbinding magic of three-dimensional television images without the glasses. Though prototypes of these TV screens already exist, consumers will not have to wait much longer for the market introduction of these autostereoscopic displays. Neverthe-less, the content might be a bit problematic: The 3D movies currently available on Blu-ray are based on two different perspectives, i.e., two images, one for each eye. However, autostereoscopic displays need five to ten views of the same scene (depending on the type). In the future, the number will probably be even more. This is because these displays have to present a three-dimensional image in such a manner that it can be seen from different angles indeed, there is more than one place to sit on a sofa, and you should be able to get the same three dimensional impressions from any position.
Researchers at Fraunhofer Institute for Telecommunications, Heinrich-Hertz Institute, HHI in Berlin recently developed a technology that converts a Blu-ray's existing 3D content in a manner that enables them to be shown on autostereoscopic displays. "We take the existing two images and generate a depth map that is to say, a map that assigns a specific distance from the camera to each object," says Christian Riechert, research fellow at HHI. "From there we compute any of several intermediate views by applying depth image-based rendering techniques. And here's the really neat thing: The process operates on a fully automated basis, and in real time." Previous systems were only capable of generating such depth maps at a dramatically slower pace; sometimes they even required manual adaption. Real-time conversion, by contrast, is like simultaneous interpretation: The viewer in
|Contact: Christian Riechert|