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Old Nov 26th, 2010, 03:35 PM   #1
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Cool Stereo Images

Hardly a new idea. Stereo cameras have been around since prior to the US civil war and of course many of us still remember the Viewmasters. However you can do it with any still camera by taking a photo and then moving the camera to the right and taking another. Works best with square or vertical shots.

The two images are put together as below.

This image had a separation of about 3 feet. If there is no close foreground separation can be a lot greater, as much as 100 feet or more. Greater separation will exaggerate the stereo effect.

The idea is to view the left image with the left eye and the right image with the right eye. Depending on your screen resolution you may need to be three or four feet from your monitor. Reflections can make the images very difficult to view. If you can see the stereo pixel images this one should not give you any difficulty, but some people seem to be unable to do it all.

ArtesianCN_S.jpg
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Old Nov 26th, 2010, 05:13 PM   #2
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Stereoscopy is pretty neat. My friend had an iPhone app that would help him take 3D photos, I think it was probably this one:

3D Camera for iPhone, iPod touch, and iPad on the iTunes App Store

Personally, I find the cross-eyed type (left eye looks at right image, right eye looks at left image) much easier to focus on.
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Old Nov 29th, 2010, 01:43 PM   #3
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Sorry Trose but convention is not reversed. Still easy enough in PS or LightRoom for you to swap the images if that's how you prefer it.

Was hoping this might inspire a few of you to post your own efforts. In the meantime this burl I found last spring. Trying to keep it as big as possible so you will need to be back from the screen a fair bit.

Separation on this one was only a few inches.

Burl_1.jpg
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Old Nov 29th, 2010, 04:30 PM   #4
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this sounds really interesting but I don't think I am getting it (sorry if I am a bit slow).

Could you help me out, should the images be morfing into one in my mind or jumping off the screen or something??
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Old Nov 29th, 2010, 07:04 PM   #5
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Quote:
Originally Posted by Trevor Robertson View Post
this sounds really interesting but I don't think I am getting it (sorry if I am a bit slow).

Could you help me out, should the images be morfing into one in my mind or jumping off the screen or something??
Some people simply cannot do it so don't feel that you are slow or dumb or anything else.

Sit back 3-4 feet from the screen. Try to make sure there are no reflections. Force your eyes to uncross. You should see three images with the one in the middle showing 3D relief. It won't leap out of the screen but you will see that third dimension.

It may help to hold a piece of cardboard at right angles to the screen in such a way that the left eye can only see the left image and the right eye the right image. Gets fairly easy after you have done it once.

Might be a little easier with this smaller image:

BurmisTree_S1.jpg
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Old Nov 29th, 2010, 10:20 PM   #6
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thanks got it, that is great!

Very cool, thanks!
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Old Nov 29th, 2010, 10:39 PM   #7
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Hmmm, doesn't work for me at any distance or with the cardboard bit either. It still looks like a pair of identical shots.
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Old Nov 29th, 2010, 10:52 PM   #8
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Same here. Must be me and my defective eyes. Mind you, I have to wear glasses these days and they're progressive lenses. It may be that those conditions rule out the 'magic.'
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Old Nov 30th, 2010, 02:22 AM   #9
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When I was a photogrammetrist, using a stereoplotter, stereo images were my bread and butter. The waterfall and tree worked fine, but the burl was inverted. I may have been too close.
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Old Nov 30th, 2010, 02:51 AM   #10
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Quote:
Originally Posted by eMacMan View Post
... you can do it with any still camera by taking a photo and then moving the camera to the right and taking another. Works best with square or vertical shots.
The waterfall and tree are great, not getting the wood one though.

I've viewed and wondered about this technique before...are both shots focussed on a key element? Is it the slight angle difference between the two then, that leads to the 3D effect when both images are viewed side by side?

Never tried it, but can an image be copied, set beside its twin, and then both be horizontally rotated ever so slightly in Photoshop, so that they would mimic the scene as viewed by both human eyes? Would this create the same effect?
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