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stereoscopic compositing

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stereoscopic compositing

Postby xyz » Wed Mar 25, 2009 2:25 pm

what is stereoscopic compositing?
& what are the basic things to follow stereoscopic renders?
what are the compositing softwares u can use for the composites

Thanks
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Postby maxdiamond » Wed Mar 25, 2009 7:48 pm

Stereoscopic imaging is also known as Anaglyph or Real 3D.

Traditional stereoscopic photography consists of creating a 3-D illusion starting from a pair of 2-D images. The easiest way to create depth perception in the brain is to provide the eyes of the viewer with two different images, representing two perspectives of the same object, with a minor deviation similar to the perspectives that both eyes naturally receive in binocular vision. If eyestrain and distortion are to be avoided, each of the two 2-D images preferably should be presented to each eye of the viewer so that any object at infinite distance seen by the viewer should be perceived by that eye while it is oriented straight ahead, the viewer's eyes being neither crossed nor diverging. When the picture contains no object at infinite distance, such as a horizon or a cloud, the pictures should be spaced correspondingly closer together.


More info

These days Nuke is extensively used to composite Stereoscopic images (movies). After Effects is also used to carry out the same.

When it comes to CG material, 3D softwares like Maya are capable of rendering out Stereoscopic images with options to adjust zero parallax depending on the display system for which the final output is intended for. This can also be changed in the compositing application.

Special glasses like Linear Polarized glasses or Anaglyph glasses are required to view the stereoscopic images.

I bought myself a set of Anaglyph glasses to mess around Stereoscopic imaging in After Effects and Maya. Lets see how it goes.

Even though the Anaglyph 3D glasses are optimized to reduce the discomfort that was known to cause the users, constant usage may cause headaches or nausea in some people, so I guess the compositors will become guinea pigs for Stereoscopic compositing. :P
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Postby xyz » Thu Mar 26, 2009 11:45 am

:lol: Thank a lot maxdiamond ,
i am also doing some rendering through stereoscopic and tryin with after effects but i dont know how live action plates react in after effects if u have any information regarding then pls share

thank a lot again
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Postby maxdiamond » Thu Mar 26, 2009 1:08 pm

1. Digital Tutors has released a new title called Stereoscopic 3D in After Effects.
It is the best resource out there to learn the stereoscopic compositing in After Effects.

Image

Find more details here

Get a Free Sneak Preview of the DVD

Furthermore the following are other resources you can check out.

2. After Effects Stereoscopy PDF tutorial

3. Also try out SVI Stereo 3D Editor for After Effects from Spatial View, an effective and easy to use tool to help designers achieve high quality 3D impact, without affecting their workflow.
Image
Screenshot

4. Then there's a free handy script which allows you to create stereoscopic compositions easily. Read more about it and download the script from the link below.
Creating HD Stereoscopic Compositions After Effects

5. The last of all, you have the native After Effects native plugin called 3D Glasses Effect, though it is not exactly the same as the real stereoscopic imaging and it is limited to 8-bpc color only. Still it can be used to create quick stereoscopic using the graphics created in AE or rendered in other applications.
More info about 3D Glasses Effect
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Postby maxdiamond » Thu Mar 26, 2009 1:17 pm

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Postby xyz » Fri Mar 27, 2009 12:55 pm

Thanks a lot
I am Going throgh all the links
thanks once again
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Postby srinivas.mohan » Sat Mar 28, 2009 4:23 am

If you remember the film called Magic Magic (Stereoscopic film) I have done the vfx supervision and execution of the shots. below is my view about stereoscopic.

To understand the stereoscopic concept, first ask your self this simple question, i.e, Why do we have 2 eyes rather than 1 eye? If you don't know the answer, please spend few min. to think, sure you will get the answer. If you didn't

One eye captures and produce simple 2Dimenstion(flat) images like regular camera. Similarly other eye also generate similar 2D flat image with little perspective shift. Our brain process both the images and calculate Z depth(distance) information. Based on this we will be able to judge the object distances.

This you can check by your self with simply close one eye and ask someone to show their finger in front of your face around 2nd half feet away, then try to touch with your pointing finger from side ways with out moving your face forward. Since you are missing one eye image your brain can't judge the distance and it is difficult to touch their finger. please try, you will surprise by this.

So to reproduce this depth fell, like our 2 left and right eyes, we have to shoot with 2 simple cameras in same distance as our eyes. Shooting and capturing of 2 images is one stage and the main question is how to send 2 left and right separate images to left eye and right eye separately. If you try to project or display the left image both left and right eye will see that image same time, but our aim is to send the left camera image to only left eye and right camera image to right eye separately with out seeing each other. To do that, we have few techniques like Anaglaph, polarized glass, shutter glass etc.. The cheep and old method is Anaglaph . This technique is simple, colour correct(tint) one camera(Right) image as red and another image(Left) as Blue or cyan then use same color tinted glasses in respective order. So the red tone image(Right) can see only through red tinted glass(Right eye), in the same time red tinted image won't visible through Cyan glass(Left glass). with this you will be able to get full 3D effect.

If any one interested I will elaborate other techniques.
Srinivas Mohan
VFX Supervisor

Indian Artists
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Postby Rahul » Sat Mar 28, 2009 10:57 am

Thanks a lot for the info and definitely we are interested to hear more about other techniques. :)
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