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.
I believe the Infitec stuff is cheaper than active stereo gear, but
still not very cheap. I remember seeing somewhere that even the glasses
were around E50,- per pair. I guess they didn't let you keep those after
the movie? :)
Regards,
Paul
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