28 Jan
2002
28 Jan
'02
1:31 p.m.
On Jan 28, 17:16, Ram Meenakshisundaram wrote:
left
Pete Turnbull wrote:
>
> This is very similar to the way LCD shutter glasses like CrystalEyes
work.
Try a web
search for that?
LCD shutter glasses (which I also have), use page flipping to show the image
on the full screen then the right image on the full screen. The LCD
glasses
"shutters"
between the two images so that the left eye sees the left image and the
right
eye sees
nothing (a shutter is put on the other eye) and it flips back and forth
(sync'ed by the monitor).
Interlaced works differently. The right image is on the even lines and
the
left image is on the odd
lines, so the resolution of the image is cut in half....
That's exactly how one of the modes on SGIs with CrystalEyes shutter
glasses works. Even lines are on one frame and odd lines on the next, if
the image is interlaced. The shutter glasses use the vsync pulses to
switch sides between frames. That's why I suggested looking for
information about CrystalEyes. The difference is simply that in the
shutter types, you shut out one eye on odd frames and shut out the other on
even frames, while on LCD displays you display one frame (eg, the odd
frame) on the left and the next frame (even) on the right. Either way,
interlaced or not, it's alternate frames to alternate eyes.
--
Pete Peter Turnbull
Network Manager
University of York