4 ms·

Something similar to this effect was demonstrated in a do-it-yourself project on Youtube: https://www.youtube.com/watch?v=fggE3VI3NRg https://www.youtube.com/w

Something similar to this effect was demonstrated in a do-it-yourself project on Youtube: https://www.youtube.com/watch?v=fggE3VI3NRg https://www.youtube.com/watch?v=fggE3VI3NRg The device described in the paper seems to be superior to that shown at the link, because it uses a cone shaped display apparatus instead of a pyramidal one. The pyramidal display allows for only three distinct views, whereas the cone-shaped one allows for a continuously varying viewpoint.

jacinabox 9y ago
Correction, reading further I see that the linked paper describes using a gyroscopic sensor to dynamically vary the viewpoint as the user rotates the device, but it remains true that the conic apparatus can display an image to be viewed comfortably from any angle. Based on these considerations I propose an additional enhancement. Using the well understood technology of privacy filters for laptops, it could be possible to effectively occlude views based on orientation, allowing for the display of several views of a scene simultaneously, with the one visible depending on the user's orientation with the device.
- colanderman 9y ago
  > Using the well understood technology of privacy filters for laptops This is exactly how commercial autostereoscopic displays (such as in the Nintendo 3DS) work [1]. [1] https://en.wikipedia.org/wiki/Autostereoscopy#Parallax_barrier https://en.wikipedia.org/wiki/Autostereoscopy#Parallax_barri...
- crispyambulance 9y ago
  I recall there was one gimmick where a camera processes the position of the pupils of an observer and changes a display based on the position of the pupils relative to the display. It is not strictly stereoscopic, but there's an uncanny 3D effect where foreground and background move relative to each other when the observer shifts position. Sort of like paper-cutouts.
- JKCalhoun 9y ago
  > using a gyroscopic sensor to dynamically vary the viewpoint as the user rotates the device Yes, this is what occurred to me when watching the video. It must know if it being rotated. For the tiger to be seen on the side of the cone you are viewing, it needs to be rendered on the display somewhere between the "nickel" and the viewer. Someone viewing from the opposite side of the cone would not see the reflection that you are seeing — no tiger on their side of the cone. (Now, in that specific case, two viewers 180 degrees apart, you could in fact render two tigers on opposite sides of the code so both viewers see a tiger.) No true stereo at all though with the cone. Left and right eye will see the same tiger. Only a sort of "perceived" stereo if you rotate the device.
  - Turing_Machine 9y ago
    > No true stereo at all though with the cone. The video shows them using anaglyphs for this. Presumably shutter glasses could also be used if you wanted better color rendition.
    - thomastjeffery 9y ago
      Polarized glasses could also work.
      - colordrops 9y ago
        I don't think any tablets have the ability to selectively emit polarized light.

jacinabox 9y ago

Correction, reading further I see that the linked paper describes using a gyroscopic sensor to dynamically vary the viewpoint as the user rotates the device, but it remains true that the conic apparatus can display an image to be viewed comfortably from any angle. Based on these considerations I propose an additional enhancement. Using the well understood technology of privacy filters for laptops, it could be possible to effectively occlude views based on orientation, allowing for the display of several views of a scene simultaneously, with the one visible depending on the user's orientation with the device.

colanderman 9y ago
> Using the well understood technology of privacy filters for laptops This is exactly how commercial autostereoscopic displays (such as in the Nintendo 3DS) work [1]. [1] https://en.wikipedia.org/wiki/Autostereoscopy#Parallax_barrier https://en.wikipedia.org/wiki/Autostereoscopy#Parallax_barri...
crispyambulance 9y ago
I recall there was one gimmick where a camera processes the position of the pupils of an observer and changes a display based on the position of the pupils relative to the display. It is not strictly stereoscopic, but there's an uncanny 3D effect where foreground and background move relative to each other when the observer shifts position. Sort of like paper-cutouts.
JKCalhoun 9y ago
> using a gyroscopic sensor to dynamically vary the viewpoint as the user rotates the device Yes, this is what occurred to me when watching the video. It must know if it being rotated. For the tiger to be seen on the side of the cone you are viewing, it needs to be rendered on the display somewhere between the "nickel" and the viewer. Someone viewing from the opposite side of the cone would not see the reflection that you are seeing — no tiger on their side of the cone. (Now, in that specific case, two viewers 180 degrees apart, you could in fact render two tigers on opposite sides of the code so both viewers see a tiger.) No true stereo at all though with the cone. Left and right eye will see the same tiger. Only a sort of "perceived" stereo if you rotate the device.
- Turing_Machine 9y ago
  > No true stereo at all though with the cone. The video shows them using anaglyphs for this. Presumably shutter glasses could also be used if you wanted better color rendition.
  - thomastjeffery 9y ago
    Polarized glasses could also work.
    - colordrops 9y ago
      I don't think any tablets have the ability to selectively emit polarized light.