How do you shoot in 3D?

Jeremy Ordan

Jeremy Ordan

Major Contributor
I know this is going to seem like the most ridiculous question, but... How do you shoot in 3D? I have been using the search function here at DVXUser.com and also at google, and I can't find a thing about how you do it. I did find something about having two projectors, but that doesn't make sense, because you can go rent Nightmare on Elm Street 6 with 3D glasses. That would make you believe that you could actually do this yourself. My question is.. well how?

Does anyone know?

One of those neat little tidbits of information I figure someone here has got to know, right?
 
You eed to record two images, offset from each by the distance eyes are offset. (3.5"? 4"?)

Then, the images are combined...either with colored filters applied to each side, or after polarizing each in different directions.

This site http://www.3dphoto.net/stereo/stereo.html gives a much better explanation, at least for a starting point.

Dan
 
im not sure, only cause I have never dabled in the art of 3D video, but I believe that it is in post-pro that you can make a simple 3D filter in a normal editing prog, but if you want to make and advanced one, I believe there is a program that can handle it, maybe abobe after effects, or apple's shake

-Matt-
 
About 10 years ago an inventor came to our multimedia company with a demo of a 3D video system. The camera was simply two CCD cameras spaced a few inches apart, and the image was combined onto a single TV screen.

You saw 3D by wearing glasses with LCD shutters and looking at the monitor. The quality was very good.

He also had LCD "TV" goggles which would immerse you into whatever the camera was seeing. If someone took the camera and shook it around, you'd fall to the ground and feel very queasy.
 
There is (was?) a stereo lens for the xl1 I saw demonstrated at Showbiz.

true stereo has to be done by gathering 2 images, either with 2 lenses or a beam splitter. 2 lenses is very techincal, but the beam splitter can be done with newbies. 3d is a huge ammount of art and science, and a lot more difficult than you would expect.

I used to do 3d still photography (stereo realist), and I've been wanting to make 3d video for a while. If I do, this would be the way I would go, although you can't use the DVX, youneed a camera w/ 58mm lens:

http://www.i-glassesstore.com/h3dsystems.html

There are other "tricks" in post to create the illusion of 3d, but 2 original images is the only real way to go.

-j
 
Thanks for the responses everyone. By the way, I'm getting a free lunch because of ya'll (my buddy and I were at lunch and we were debating 3D).

This has been really informative though
 
Yes, you can do simple 3D in AE after you have shot. You simple seperate the channels and move the red to one side and the blue ot the other, leaving the green in the middle. I don't know where I heard this explanation but I have done it and it works fairly well. You can also "ERASE" parts of the channels to give certain parts more depth. I will see if I can find the link becasue this was years ago.
 
I just reread this post for the first time in a little while, and now I'm wanting to try to do a DIY camera rig using a couple of GS9's (Panasonic's lowest end unit) to see if I can build a 3D camera for giggles. I'm going to put this as number 8372 on my to do list, somewhere below winning a Nobel Peace Prize, but it's on the list.
 
Yes, i am interesting too in this process. I think it could not be hard.

Once we get the two images... how do we combine them to a single frame with the Z channel on it (the usual red/blue double line)?
 
Canon (I think it's Canon anyway) has a 3D lens available....but I'm not sure how well it works....and it's mega-expensive.
 
macgregor,
That's the easy part. Sync up the video from the two cameras (you do need to use a slate with clapstick or hand clap).
For the left eye camera, pull out all the cyan using the color curves tool in your NLE. This will give you the red channel.
For the right eye camera, pull out all the red; this will give you the cyan channel.
Combine the tracks using an additive dissolve or "screen overlay" function.
Render and view with anaglyph (red/cyan) glasses. Bingo! Real 3D.
Hope this helps.
Ken
 
kplo said:
macgregor,
That's the easy part. Sync up the video from the two cameras (you do need to use a slate with clapstick or hand clap).
For the left eye camera, pull out all the cyan using the color curves tool in your NLE. This will give you the red channel.
For the right eye camera, pull out all the red; this will give you the cyan channel.
Combine the tracks using an additive dissolve or "screen overlay" function.
Render and view with anaglyph (red/cyan) glasses. Bingo! Real 3D.
Hope this helps.
Ken
Click to expand...



Why Cyan and not blue? Where can i get a good glasses (instead of the paper ones that give you in the national geographic)?
 
Cyan is the "opposite" of red and does a better job of cancelling out the ghosting that can occur with misconverged footage. The key to good 3D video is the alignment of the cameras; the closer together you can get them, the better...2 to 2/12 inches is ideal.
The vertical allignment is also critical to avoid having to shift one side up or down in post.
Obviously, you need small dv cameras for this; I've used the Pana953 with great results.
Hope this helps
Ken
 
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