4 ms·

I have difficulties understanding the mecanism of this supersampling (2 succesive images to make one ?). Can anyone explain this in a simple way ?

• ygra 12y ago
  They have two layers, slightly offset (by half a pixel in both directions) on which they show different images which, together, combine to one of higher resolution. They also can show different frames shortly after another quickly enough so that they appear to belong to the same image, but each contributing different parts to either temporal or spatial resolution of the final image. Since they're using off-the-shelf LCD displays for their prototype, I guess the final result is not yet flicker-free (they probably cannot show more than 60 fps, and thus not more than 15–30 high-resolution frames per second). Also evident as they're demonstrating the capabilities with 5- and 10-fps video. But that's just a matter of a higher refresh rate for the displays, I guess, unless computing the individual frames is too taxing for now (it doesn't seem to be, they do plenty of work in shaders, being NVidia and all). Major benefits seem to be cost, simplicity and size; their prototypes were built as a head-mounted display and a small projector.
  • swimfar 12y ago
    I found this aspect of the build interesting: "The bare liquid crystal panel was affixed to the base plate, held in direct contact with the first LCD at a fixed lateral offset. As assembled, the front polarizer on the bottom LCD is crossed with the rear polarizer on the top LCD. Rather than remove the polarizers from the thin glass panels, we placed quarter-wave retarder film between the two (American Polarizers APQW92-004-PC-140NMHE): rotating the polarization state to restore the operation of the top LCD." It's probably extremely basic knowledge for people familiar with polarization, but I didn't know it could be so simple.
  • keenerd 12y ago
    > their prototypes were built as a head-mounted display and a small projector. Sounds like there are issues with parallax. Both head-mount and projectors have the benefit of a fixed viewer (or light-source, same thing) relative to the display. LCDs have depth, and at any other angle your offset is ruined. The tech is not likely coming to a desktop or laptop monitor any time soon. Of course you can probably get around this. The two most obvious solutions being face tracking or paper-thin LCDs.
• p1mrx 12y ago
  The main part of an LCD is transparent. It looks like they've stacked one in front of the other, with a half-pixel offset, and arranged the polarizers in such a way that they perform a multiply operation. So, two panels can produce 4X the resolution, using only static images. But I'm guessing they'd have to sacrifice some bits in the luminosity domain to make it work.
• snarfy 12y ago
  Take a piece of graph paper, and then put another on top, offset in the X and Y half a square size. You can still see the lines underneath, making it look like the grid has double the number of squares. The rest is math.
  • mattdeboard 12y ago
    I don't know if this is technically accurate or not, but "<broad layman explanation>. The rest is math" is begging to be a snowclone.