3D Crosseye Stereo updated 29 Oct

[philslizzy]

kds315* made a post showing his 3D experiments. So as not to hijack it, here are my efforts. The proper term for these images is 'Stereograms'

Not everyone can do crosseye stereo but I can, so here are a few photos. These were taken a while ago mostly on my Nikon D40. I don't use fancy equipment, I use the 'Timewarp' technique and if necessary line up the photos before pairing in Photoshop.

Here goes.









I love this one, a mormal photo just doesnt do it justice








The last one was tricky, both people had to stand absolutely still and only move their eyes to the camera.
I made an anaglyph version for my nephew (pictured) which I just can't find.

[philslizzy]

Timewarp technique?

http://www.stlyrics.com/songs/h/horrorrocky10629/timewarp341755.html

[philslizzy]

Some more dragged out of the archives, I'm on a roll now!!





I like the flare on this one.















all for now folks

[philslizzy]

How to make stereograms and the 'timewarp' technique explained

Stereoscopy isnt hard, the hardest part is viewing them. More later.

To achieve a 3D effect you need to take a photo and move the camera left or right a little then take a second photo. Your eyes are just few centimetres apart, enough to get a three dimensional view of the world. To replicate that photographically, Ideally the camera viewpoint should be the same. Sometimes it works, sometimes not. Sometimes the distance between the camera viewpoints can be varied - depending on the subject photographed and effect wanted. I often take 3 or 4 shots varying distances apart and select the best pairing.

You can buy all sorts of fancy equipment to move the camera left or right between shots but I prefer to use the 'Timewarp' technique:

Quote the song:
"It's just a jump to the left. And then a step to the right."

Lean your body to one side, take the first image then lean it to the opposite side then take the next image. Or take a step to the right.

A 'point of interest' is important when making stereograms, as without one they can be difficult to see. Decide which is the point of interest, focus on it and keep it in exactly the same place in each photo.

Make sure your photo has depth. Depth? yes, objects in front of and behind your subject are important, particularly scenery, the one of the boat and the farm both have a wall in front of them, keeping this in frame helps the 3d effect. Below is a nice photo of a ruined monastery, no foreground gives it a flat appearance.



for a better 3D image of this I should have stepped 50cm or more rather than the normal 10 - 15cm

These next pictures were taken a good metre and a half apart and about 12 seconds between them (a proper timewarp!) this allowed the clouds to move enough to get the effect, the clouds were the point of interest:





These images were taken with about 20 to 30 cm between the two images, enhancing the 3d effect









Lastly here is a portrait of a friend. She had to sit absolutely still, the pics were taken about 15 cms apart so the effect is grossly exaggerated. I took one pair with her eyes focused on my shoulder and the next pair with her eyes looking at the camera in both shots. This is by far the better, where she is looking at the camera. The point of interest (as always with portraits) was the eyes.



I'll get back with more of my technique later and look at the different viewing techniques and software that you can use.

Thanks for looking

[kds315*]

Very nice, great depth and sharpness! So you do the cha-cha method?
I use the free stereo-photo-maker, quite happy with it. And you?
(of course this method has issues. a beamsplitter is of course much better, but clumsy to use and halfs the resolution...)

[philslizzy]

Cha cha I like it. Look again, while you were writing this reply I added a few more images

[kds315*]

Also quite nice, I like the ones shot in the south, very 3D!

[philslizzy]

[philslizzy]

I may try it with my NEX and my A6000, I have duplicate lenses I can use on both, they both use the same remote....

[peterqd]

Phil, I love the pictures but I can't see them in 3D whatever I do. Can you explain for me how to view them please? How far away from
the screen should my eyes be?

[DigiChromeEd]

Phil, these are great, the 3D effect is really distinctive!

Peter, sit about three feet away from your screen, look at the gap between the photos and slowly cross your eyes until the combined 3D image appears between the two shots.

[philslizzy]

[philslizzy]

Looking again at them, the one of the rocks looks so different in 3D, and the one of the old hollow log is hard to make out in 2d. Stereoscopy helps make sense of some images, scientists and geologists use it regularly. The Apollo astronauts used same technique as I when photographing objects on the moon's surface.

[philslizzy]

Some pics today taken at Dunham Massey





















Thanks for looking