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3D Trailers

post #1 of 10
2/16/09 at 8:47pm
Thread Starter 
I saw Coraline in 3D last week, and that's in another thread. Perhaps I got in the theater after the trailers.
But, I saw Coraline 3D again today and before the trailers began a title card instructed, "Put On Your 3D Glasses Now"
At which time we were treated to at least THREE 3D trailers!
Monsters vs. Aliens, Astro Boy and Ice Age; Dawn Of The Dinosaurs.
The standout, for me, was "Monsters vs. Aliens".
As jazzed as I was about the quality of the 3D in Coraline, Mvs.A looks miles ahead.
I guess the only way to see these is at a Coraline showing, so, there it is.
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post #2 of 10
3/25/09 at 3:18pm
Thread Starter 

Re: 3D Trailers

http://www.cbsnews.com/stories/2009/...4887715.shtml?

Good story on the CBSNews site about the process.

An excerpt:

"Old-fashioned 3-D films relied on two projectors playing simultaneously, one showing a left-eye image and the other a right-eye image, mimicking the brain's perception of depth through the merging of these separate images.

If the timing or alignment of either projector was off, moviegoers ended up with a blurry picture, eye strain and headaches.

Digital projectors fixed that. A single projector runs at 144 frames per second (instead of the typical movie pace of 24), projecting sequential images for the right eye and left eye so fast that they appear to be simultaneous.

"It literally projects left eye and right eye three times per movie frame," McNally said, adding that the projectors also allow for "perfect synchronization and perfect alignment" - no more shaky pictures."
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post #3 of 10
3/26/09 at 2:07pm

Re: 3D Trailers

3D trailers sound cool. I have not seen a "new" 3D movie yet, unless you count the 4D movies/shows at Disney. I think the last one I saw at the theater was Friday the 13th Part III!

A recent Entertainment Weekly mag has a 3D summer movie preview with included glasses you tear out. The pics themselves didn't look very 3D to me. Those old 3D Viewmasters had more depth than those pics did. But I can't wait to see a modern 3D flick!
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post #4 of 10
3/26/09 at 4:05pm

Re: 3D Trailers

Quote:
Originally Posted by Henry Gale
Good story on the CBSNews site about the process.

An excerpt:

"Old-fashioned 3-D films relied on two projectors playing simultaneously, one showing a left-eye image and the other a right-eye image, mimicking the brain's perception of depth through the merging of these separate images.

If the timing or alignment of either projector was off, moviegoers ended up with a blurry picture, eye strain and headaches.

Digital projectors fixed that. A single projector runs at 144 frames per second (instead of the typical movie pace of 24), projecting sequential images for the right eye and left eye so fast that they appear to be simultaneous.

"It literally projects left eye and right eye three times per movie frame," McNally said, adding that the projectors also allow for "perfect synchronization and perfect alignment" - no more shaky pictures."
Link?
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post #5 of 10
3/26/09 at 5:19pm
Thread Starter 

Re: 3D Trailers

Katzenberg: 3-D Theaters Rollout Will Quicken. - CBS News
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post #6 of 10
3/26/09 at 8:38pm

Re: 3D Trailers

Quote:
Originally Posted by Henry Gale
The text you quoted is not in the link you provided.

That description of how digital 3D works is completely false. Simply alternating between the left and right eye image would only work if you had cumbersome electronic glasses that filtered out every other frame for each eye. I'm also not sure why 144 frames would be necessary for such a system.

Current 3D uses two projectors, each projecting one "eye", exactly as old 3D did. The improvement comes from having the two projectors synched up automatically and not shaking from the physical strain of moving the film across the bulb. On the audience's end, it's exactly the same process as before with the same polarized glasses.


And yes, the Monsters vs. Aliens 3D was the best I've ever seen.
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post #7 of 10
3/26/09 at 8:51pm
Thread Starter 

Re: 3D Trailers

Quote:
Originally Posted by Adam Lenhardt
The text you quoted is not in the link you provided.

Then I want to call my attorney.
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post #8 of 10
3/27/09 at 7:51am

Re: 3D Trailers

Quote:
Originally Posted by Adam Lenhardt
The text you quoted is not in the link you provided.

That description of how digital 3D works is completely false. Simply alternating between the left and right eye image would only work if you had cumbersome electronic glasses that filtered out every other frame for each eye. I'm also not sure why 144 frames would be necessary for such a system.

Current 3D uses two projectors, each projecting one "eye", exactly as old 3D did. The improvement comes from having the two projectors synched up automatically and not shaking from the physical strain of moving the film across the bulb. On the audience's end, it's exactly the same process as before with the same polarized glasses.


And yes, the Monsters vs. Aliens 3D was the best I've ever seen.


If the article had been referring to IMAX 3-D it would have been incorrect. But if it is referring to the Real-D 3-D systems that are used in most theaters, then it IS correct. All Real-D systems are single projector / 144hz alternating frame designs, where the polarization is flipped back in fourth (using a Z-screen) in perfect sync with the left right images being fed into it. While the features are still produced in the standard 24fps temporal rate, the Real-D 144 fps refresh rate is necessary to eliminate flicker.
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post #9 of 10
3/27/09 at 9:28am

Re: 3D Trailers

Quote:
Originally Posted by GregK
If the article had been referring to IMAX 3-D it would have been incorrect. But if it is referring to the Real-D 3-D systems that are used in most theaters, then it IS correct. All Real-D systems are single projector / 144hz alternating frame designs, where the polarization is flipped back in fourth (using a Z-screen) in perfect sync with the left right images being fed into it. While the features are still produced in the standard 24fps temporal rate, the Real-D 144 fps refresh rate is necessary to eliminate flicker.
Fascinating, I'd never heard of that, but it makes sense technologically. I didn't know they had a way of alternating polarization like that.

Sorry for doubting you, Henry!
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post #10 of 10
3/31/09 at 8:47am

Re: 3D Trailers

would everyone who is 3-D enabled at home please support the suggestion in post 671:

http://www.hometheaterforum.com/htf/...ml#post3533487

Personnel from Warners Archive is monitoring the thread.
This is NOT the place to ask about how 3-D DVD works etc., just please support the suggestion that if field-sequential 3-D DVD's are offered through the burn-on-demand Archives program that you will buy them.

Many thanks.

Richard
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