Paul Melis wrote:
Garry Keltie wrote:
Last weekend I had the pleasure of seeing Ice Age 3 in 3D. I highly
recommend it not only for the animated hoot but the stereo effect is
definitely the most comfortable I have seen in a cinema.
I'm wondering if anyone knows much about the method? Has quite a few
pluses to it. It's pretty much done with wheels and filters in the
cinema but it strikes me that unless its protected with patents,
might be an attractive method, with a bit of work, for commodity (non
quad buffering) graphics.
A quick trawl fished up some links below.
http://en.wikipedia.org/wiki/Stereoscopy#Infitec_glasses
http://www.dolby.com/uploadedFiles/zz-_Shared_Assets/English_PDFs/Professional/Dolby_3D_Digital_Cinema.pdf
http://www.dolby.com/professional/motion_picture/technologies/dolby-3ddigital-specifications.html
http://www.infitec.net/infitec_english.pdf
Infitec has been around for some time now, I think I saw it at
siggraph a couple of years ago. It is quite a nice method, but people
seem to complain mostly about the slight differences in color between
the eyes (due to the different spectra used). But the eye separation
is much better than when using simple polarized glasses.
Interesting how Dolby 3D uses a filter wheel in front of the normal
cinema projector. That makes it easy to 'augment' existing digital
cinemas with 3D capabilities. But I guess you need quite a stable
rotation to not get out of sync. You could always use two projectors
and give them a filter each, to get a conventional passive stereo set.
Oh yeah, another advantage: at least you don't need a silver screen with
infitec, as there's no polarization to preserve :)
Paul
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