Slashdot Mirror

← Back to Stories (view on slashdot.org)

3D Display, No Glasses Required

Posted by timothy on from the lucas-had-this-in-1977 dept.

Shibatch writes "Hitachi, Ltd has developed a 3D display called Transpost which can be viewed from any direction without wearing special glasses. 3D movies can be seen as floating in the display. Also, 3D movies captured at other places can be shown on the display in realtime. The principle of the device is that 2D images of an object taken from 24 different directions are projected to a special rotating screen. They also developed a camera which can capture images from 24 directions simultaneously." The pictures are interesting, but ... translations, anyone?

6 of 285 comments (clear)

  1. New ? by Anonymous Coward · · Score: 4, Interesting


    the artist Dali played with lasers and 3d holograms in the eighties, of note was a woman in a rocking chair that just floated in thin air (about 6in tall) (red)

  2. Old News by jakoz · · Score: 5, Interesting

    Old news, but the best article I've read on this yet is the New Scientistarticle from a couple of years ago in which they first (for me) described realtime rendering using existing games. Interesting stuff.

  3. Seems like technology similar... by Anonymous Coward · · Score: 5, Interesting
    to the one developed by Actuality. It was reported here on Slashdot like a year ago (I'm too lazy to find a link). Actuality's technology is described on their homepage, and since the visual appearance is similar I guess the technology is too. Plus I can't really imagine another way of making this work.

    Basically its just layers of projected images, spinning around to give the impression of volume. Still really neat though.

  4. 3D in a way by nuffle · · Score: 4, Interesting

    From the article description and pics, this seems to be a relatively simple concept, but nicely implemented. Although I can't read the article, I'm guessing that the "3d" effect is a much better version of those "holograms" that appear to move when you tilt at different angles (e.g. Ken Griffey player appears to swing when you tilt his baseball card). But instead of 2-3 images on a flat card, you have 24 images on a cylinder. Needless to say, it's not "real 3D" as none of 24 images themselves have depth.

    Some people mentioned a strobing projector around a rotating screen as being the method used here. I wonder if also some sort of projector facing upward from below could be reflected laterally in 24 directions by a 24 sided mirror.

  5. s/unless/until by King_of_Prussia · · Score: 5, Interesting

    The porn industry seems to jump on new technology a lot faster than "mainstream" industries, proving the effectiveness of new tech so the big boys don't have to take any inwanted risks. Look at multi-angle DVD's, they are only just starting to show up in genres outside of porn, and how long has the technology been around?

    --

    Making the moon less necessary since 1998.

  6. Heavy processing workload by zero_offset · · Score: 4, Interesting
    Unless I'm missing something, this approach (as others have noted, this is Hitachi's take on a relatively old idea) means you have to constantly generate an image for EVERY viewing angle. In this case, you're cranking out 24 3D images for every frame.

    Either your images have to be very simple, or you need extremely powerful hardware, or the resolution sucks, or you're going to have to accept low frame rates.

    I wonder how frame rate relates to the rotational speed of the projection surface.

    --

    Slashdot quality declines as the number of hot grits posts decreases. - Provolt's Law, Apr-09-2005