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racerx3
Up and Coming
April 17, 2014

3D Camera Lens pictures viewable in Rift?

Sorry for the new thread, but my searches are returning ambiguous answers.

Very simply: If I use a 3D camera lens to take a photograph, can I use VR player (or anything) to view the file in realistic 3D? OR, are the lenses too close to one another to get the correct perspective difference between the left/right eyes? Is the IPD a function of software adjustment, hardware, or both?

Example lens: http://www.amazon.com/Panasonic-12-5mm-3D-Interchangeable-Cameras/product-reviews/B0043VE292/ref=dp_top_cm_cr_acr_txt?showViewpoints=1

Thanks, guys.

    28 replies

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    Nekto2
    Inspiring
    April 21, 2014
    Hi

    To make things simple just imagine a cube/box with size equals to your IPD (65mm).

    http://content.foto.mail.ru/mail/ledmaster/19/s-69.jpg

    Left part of image is the correct one. Line of sight of each eye goes straight in parallel to the each side of box.

    Next one shows distortion of object if we change viewing distance.

    And the third one is distorted object if we both change the distance and scale image on screen.

    You could draw example to the case of using less IPD/camera lense then real eye IPD. Actually you should scale both object size and IPD to get correct result.

    So the correct answer is: no, you can't do anything to you video to compensate any change to IPD. But you could scale image so, that IPD will become correct. And you should realign images so, that distant object remain distant (distance on screen will became exactly 65mm = IPD).

    That means if you shoot video with lense distance of 65mm you can't show it to any person with other IPD than 65mm.
    You could try that with photo, but video will make a lot of headache. It you do not believe me, just change in Oculus config IPD to wrong one and try some demos ;)

    You could try to see this image on stereo 3D screen: http://img-6.photosight.ru/93b/4567414_large.jpg
    The correct scale will be if the distance between grey lines set to 14.2cm. And your head are exactly 50cm away from screen. Then you should feel the image as exactly correct. And you could put real CD just under the image and compare them. But do not move your head or it will spoil illusion.
    :)

    ps. as for toe-in or parallel selection. You could use any you like. But for toe-in you should fix image distortion afterwards. It's not as complex, as it was in pre-digital times.
    TomVR
    TomVR
    Up and Coming
    April 22, 2014
    "geekmaster" wrote:
    "Roaster" wrote:
    Looking at that stuff, it's a crime that everything hasn't been shot in 3D over the years. This is something we must change.

    A lot of WW2 military footage was filmed in 3D. Here is a sample (be sure to set YouTube 3D ON):




    You may want to choose "Side by side" 3D option, and perhaps "Swap eyes" option. That video looks great in cross-eyed view, but would be even better in a Rift.


    The eyes are Sudo in that clip's anaglyph
    geekmaster
    Up and Coming
    April 22, 2014
    "TomCHall" wrote:
    "geekmaster" wrote:
    A lot of WW2 military footage was filmed in 3D. Here is a sample (be sure to set YouTube 3D ON):




    You may want to choose "Side by side" 3D option, and perhaps "Swap eyes" option. That video looks great in cross-eyed view, but would be even better in a Rift.

    The eyes are Sudo in that clip's anaglyph

    What do you mean by "Sudo"? That is a posix command (super user DO). I suggested setting the YouTube 3D option to "Side by side" in my post (see the embedded quote). That video on my computer does not show any anaglyph.
    This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.
    mediavr
    Up and Coming
    April 22, 2014
    "sudo" ?? -- it niggled at my brain too -- maybe it means cross-eyed as in "pseudostrabismus"
    http://en.wikipedia.org/wiki/Pseudostrabismus
    geekmaster
    Up and Coming
    April 22, 2014
    "mediavr" wrote:
    "sudo" ?? -- it niggled at my brain too -- maybe it means cross-eyed as in "pseudostrabismus"
    http://en.wikipedia.org/wiki/Pseudostrabismus

    "Niggled" sounds pseudo-racist. Like a black person giggling. Is that okay to say?
    This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.
    TomVR
    TomVR
    Up and Coming
    April 26, 2014
    Sudo is a stereoscopic industry term for when they left and right eye are flipped. Surprised it isn't known here.
    geekmaster
    Up and Coming
    April 26, 2014
    "TomCHall" wrote:
    Sudo is a stereoscopic industry term for when the left and right eye are flipped. Surprised it isn't known here.

    "Pseudo stereoscopic" is an industry term:
    http://realvision.ae/blog/2011/10/what-is-pseudo-stereoscopic-3d-and-why-should-it-be-banned/
    http://nzphoto.tripod.com/sterea/pseudostereo.htm

    As I already said, "sudo" (super user DO) is a posix command:
    http://xkcd.com/149/

    When mispronounced, "sudo" does sound like "pseudo", so perhaps that is what caused your confusion. It comes as no surprise that a misspelling like that would be unknown here or in the "stereoscopic industry" (see the links above).

    However, there WAS an inventor named "Toshiyuki Sudo" who patented a stereoscopic display (but his name is not used to describe his invention):
    http://patent.ipexl.com/inventor/toshiyuki_sudo_1.html
    This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.
    TomVR
    TomVR
    Up and Coming
    April 26, 2014
    Thankfully I've rarely had to write it to notice.
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