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Exhaling Dissolution 3D by vincegotera Exhaling Dissolution 3D by vincegotera
This is a "free-view" or "crosseye-view" 3D stereogram of a sculpture by Sarah Deppe. Titled "Exhaling Dissolution," this sculpture is about 12 feet tall, constructed of wood with a metal framework. The sculpture stands on the University of Northern Iowa campus. It's probably no surprise that everyone I know refers to this sculpture not by its title but rather simply as "The Big Head."

I decided to try to make a 3D of this sculpture because of its large size. Instead of shooting the left and right images from vantage points about two inches apart (roughly the distance between a person's pupils), I experimented with various distances between the left and right camera placements. This was meant to enhance the stereoscopic effect; because the subject is so large using the typical left and right image points would have resulted in two images that wouldn't have been that different from each other.

To view this as 3D, position your eyes about 2 or 3 feet from the screen, relax your eyes, and while staying relaxed cross your eyes slowly until you can see three images: the left, the right, and a merged image in the middle. You may have to tip your head slightly left and right to get the left and right images to line up vertically. Once you merge the images in the middle, the resulting center image should look 3D. Once you achieve that, you can even slide your hands in from both sides to hide the right and left images, leaving only the central 3D one. If you are familiar with "Magic Eye" imagery, this is essentially the same thing.

If that doesn't work, try this. Again position yourself 2-3 feet from the screen. Put a finger up close to your face, between your eyes, and look at it with both eyes. Then pull your finger slowly away towards the screen while continuing to look at it. Without looking directly at what's on the screen, watch what's happening there. You should see the 3D image forming; once it does, remove your finger.

If the problem is that the stereogram is too large, just reduce the size of the window. The image will also reduce. Thanks to my friend Darek for that tip.

You can also learn how to do this, how to see this way, at Magic Eye Inc.'s training page.

Please respond below with critique only about my 3D imaging. Sarah Deppe's sculpture is not under critique; the sculpture is simply my model. Of course you can comment about the sculpture, but keep in mind that the "art-ness" of what I'm presenting has to do with "3D-ness." For example, should have I kept the left and right image points two inches apart? Is the 3D overly distorted with such a wide parallax? Etc.

Camera: LG-VX9200 cellphone. I have permission from Sarah Deppe to make this 3D image of her sculpture. Thanks for any critique you can offer.
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:iconvincegotera:
vincegotera Featured By Owner Apr 18, 2011
~stefmixo said:

Your image is 80% good but you still have some problems to work:

-Alignment
The images must be perfectly horizontaly aligned, NO vertical or rotation difference allowed, both during the shoot and in post prod. I recommend to use "Anabuilder", it's easy, powerful enough and free.
For Crossview, every part that touches the sides of the image (sky, trees, ground etc ...) must be BEHIND the screen. The subject in the center CAN pop out, but ONLY if it doesn't touch the sides of the frame.
(For Anaglyph, this rule doesn't apply, it's a different problem.)

-Framing.
Your framing is too close to the head. The meaning of depth is the difference between the closest object and the farthest one, you need to clearly see something close AND clearly see something far, to perceive depth.
Here, you only have 1 very close head and 1/4 of a building. The eyes need something common on both images to focus on.
Example: The right side of the frame : On the left image, you have only a closed door, on the right image only a window ... no common object on both, the eyes need it to focus correctly.

Come back to me with your new images. ;-)
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:iconvincegotera:
vincegotera Featured By Owner Apr 18, 2011
Critique from ~stefmixo ...

Your image is 80% good but you still have some problems to work:

-Alignment
The images must be perfectly horizontaly aligned, NO vertical or rotation difference allowed, both during the shoot and in post prod. I recommend to use "Anabuilder", it's easy, powerful enough and free.
For Crossview, every part that touches the sides of the image (sky, trees, ground etc ...) must be BEHIND the screen. The subject in the center CAN pop out, but ONLY if it doesn't touch the sides of the frame.
(For Anaglyph, this rule doesn't apply, it's a different problem.)

-Framing.
Your framing is too close to the head. The meaning of depth is the difference between the closest object and the farthest one, you need to clearly see something close AND clearly see something far, to perceive depth.
Here, you only have 1 very close head and 1/4 of a building. The eyes need something common on both images to focus on.
Example: The right side of the frame : On the left image, you have only a closed door, on the right image only a window ... no common object on both, the eyes need it to focus correctly.

Come back to me with your new images. ;-)
Reply
:iconvincegotera:
vincegotera Featured By Owner Apr 18, 2011
Stephane, thanks for your critique.

Especially for what you said about "framing." The reason the backgrounds are so different is that my stereo base is so far apart (probably 18 inches). I was thinking that because the sculpture was so large (12 feet tall), I had to enlarge my stereo base. I realize now that you only do that if the subject is very far away. So I should have kept the stereo base at 2 inches ... in that case there would have been the same things in the background (same window or same door, whatever). Thanks again!
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:icon3dbruce:
3dBruce Featured By Owner Apr 13, 2011  Hobbyist Photographer
Vince - Awesome image! You've definitely figured out the parallax distance. I've found that as a general rule, the farther away I am from my subject, the greater the parallax must be. There are some good websites that show the actual math, but you can figure it out for yourself pretty easily after you've done a few images. You're learning the same way I did. I read a lot online, and just shot a lot until I figured out what worked for me.

It's awesome to have another shooter who's passionate about 3d. There aren't too many of us out there. Great job, man!

Bruce
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:iconvincegotera:
vincegotera Featured By Owner Apr 13, 2011
Thanks, Bruce.

I just took a wild guess and evidently got lucky. I do think still that the 3D effect seems kinda extreme in that one. I may shoot it again, with a person next to it for scale.

The mistake I made is that I changed the stereo base (learned that from some website on stereograms) to a foot and a half based on the height of the sculpture rather than my distance from it, which was only about 20 feet. Since that's pretty close to the shooter, I bet a 2-inch slide would make for a more natural 3D effect.

What do you think?
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Details

Submitted on
April 8, 2011
Image Size
1.9 MB
Resolution
1727×1112
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Camera Data

Make
LG Electronics
Model
VX-9200
Date Taken
Oct 2, 2009, 5:27:22 PM
Software
Adobe Photoshop CS Macintosh
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