How to take stereo panoramas with Nodal Ninja 3 [Archive] - Nodal Ninja Forum

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DorinDXN
04-14-2008, 08:11 AM
Hi and congratulations for our (NN users) new forum , I posted this trick in other forums but obviously this is the right place for it.

The trick is how to take stereo panoramas with Nodal Ninja 3 panoramic head. (NN3)

This photo shows a regular use of NN3 for, say, 2D panoramas

http://dorin.devalvr.com/stereo/regular.jpg

if one use the T-adapter of NN3, (designed for mounted some off center tripod mount cameras) to have a 3 cm lateral shift of No Parallax Vertical Axis (NPVA) like in this photo where I marqued with red that 3 cm lateral shift

http://dorin.devalvr.com/stereo/right.jpg

this become so the "right eye camera" and is used for taking the photos for right eye pano

Now the trick, if one rotate the NN3 with 180 degrees about its upper rotator and with another 180 degrees about its lower rotator the result is shown in this photo

http://dorin.devalvr.com/stereo/left.jpg


this become so the "left eye camera", the camera is upsided/down but this doesn't matter.

Now the lateral shift of NPVA is 3cm in opposite direction

if one take a pano with right eye camera and then, after that double rotation, a pano with left eye camera, without moving the tripod, the setup acts like two camera setup but using only one at the time and the lower rotator of NN3 acts like "neck" of a panoramic viewer.
The total amount of the lateral shift of NPVA beetween left eye and right eye become so 3+3=6 cm close to human stereo sight.

Even if one uses fisheye lens which can assure a pano from only 3-4 photos, the number of photos must be around 10-12 for each pano to have a distributed parallax and the process of panos is more difficult than the regular panos because of that parallax, but can be done.

To see one of my cross-eye spherical pano made in this way one must use the free DevalVR plugin
www.devalvr.com/install (http://www.devalvr.com/install) only under Windows for now.

please use the arrow keys for rotating in a particular direction, left SHIFT and left CTRL for zoom in/zoom out.

http://dorin.devalvr.com/dxn_pano/crosseye_3/target_man_3d.html
http://dorin.devalvr.com/dxn_pano/crosseye_4/pano.html

also some panos in anaglyph format (need 3D cyan-red glasses)

http://www.dxn.ro/dxn_pano.html?pano=anaglyph1
http://www.dxn.ro/dxn_pano.html?pano=anaglyph2

if interest is shown I'd love to discuss about this technique.

Dorin

Macro
04-17-2008, 07:37 AM
Hi Dorin, Thanks for sharing this creative technique. I first read about it over at panoguide, but just now tried viewing the crosseye images. I can view the images and they look great, but I have a couple of questions. If you shot one complete pano, then did both 180 degree NN3 rotations, then shot the second pano... then why are the people in the same positions in both panos? Also, what would be the effect of even a greater lateral shift of NPVA, say 12mm?

David

DorinDXN
04-18-2008, 02:03 AM
Hi Dorin, Thanks for sharing this creative technique. I first read about it over at panoguide, but just now tried viewing the crosseye images. I can view the images and they look great, but I have a couple of questions. If you shot one complete pano, then did both 180 degree NN3 rotations, then shot the second pano... then why are the people in the same positions in both panos? Also, what would be the effect of even a greater lateral shift of NPVA, say 12mm?


Hi David,

Sure, between right eye pano and left eye pano will be a significant amount of time passed, maybe one minute or so, the moving fetaures like people, cars, birds so on will change their position, unlike the regular pano, for a stereo one is need for a new stage in retouching the pano to deal with those moving features. by load and alignment the panos as layers in your favorite editor you clone parts from left eye pano to right eye pano and so those moving people/objects will have the same position or will be made invisible.

I guess you mean 120 mm or 12cm

the NPVA shift is good to be keep at 6 cm. You might see the stereo photographers having greater distance bteween cameras but this is good for zoom in order to be more closer to a person/object, say, in sport photos. if you draw two lines from cameras to subject at a certain distance the shift will be again 6 cm. That photographer want to be at that distance. Increasing the distance can have result decreasing the world, mean you can produce a photo of a car like a photo of a toy car.

if you make a pano and everything is far from you, you may increase the shift.

Dorin

Macro
04-19-2008, 11:50 PM
Hi Dorin, That is a clever technique to correct moving objects. There is more work here than I thought, but I must try this soon. I will also try more/less then 3cm shift from NPVA to better visualize your explanation to "bring the world near and far". My longer NN5L lower rotator arm should make this easy. (Yes, I did mean 12cm, not 12mm)

If you have more sample stereo panos to share, please do. I would like to see more of your fine work.

David

deancp1
04-30-2008, 11:06 PM
Hi Dorin,
I've been interested in taking some 3D pictures for a while now, but have been slow to get any equipment. Looks like the NN3 could be helpful.

Thanks very much for your comments about zoom 3D, that cleared the issue up for me!

You mentioned you are willing to discuss the stereo set up further. I'd love to hear more of what your experience has taught you. I remember loving my ViewMaster toy from childhood and want to take "big kid" stereo pictures... My goal is to share with my family. I am thinking I'll buy some antique Holmes type viewers for each of my siblings, and then take stereo pictures of places from our childhood to share.

Dean.

IgoNodaLBoiNG
05-01-2008, 09:49 PM
your making me dizzy my head is spinning
cool stuff thx for sharing

Macro
05-01-2008, 11:20 PM
your making me dizzy my head is spinning


Your Nodal Ninja head should be spinning! :>