Stereopsis test with PC shutter glasses?

Discussion in 'Glasses' started by Luke Scharf, Sep 30, 2003.

  1. Luke Scharf

    Luke Scharf Guest

    I've recently acquired a used LCD shutter glasses setup for my PC. It's
    designed for video games, but I'd like to use it to test myself for
    stereopsis (now that I have the prism glasses were prescribed for me).

    I've tried running the demos that come with the video card, and the
    results are inconclusive. Both are static image, which contain two
    viewpoints. One demo appears 3dish, and one doesn't.

    So, my question to y'all -- do any of you know of a clear stereopsis test
    that one could run on a home PC with a set of shutter glasses?

    Also, those of you who use this kind of setup for any purpose -- how
    realistic is the 3d effect? The focus and head-movement queues won't be
    there, obviously (unless I build a head-tracker and some optics), but does
    it look like you could stick your hand through the monitor? Or does the
    image merely appear to have a bit more depth than you'd expect -- given
    that it's being displayed on a flat piece of glass?

    Thanks,
    -Luke
     
    Luke Scharf, Sep 30, 2003
    #1
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  2. I've never used shutter glasses, but I've heard the effect is just as good
    as with other stereo methods (free viewing, anaglyph glasses) which I find
    very realistic. Check if the software that came with your glasses has a
    viewer for .JPS images... do a Google search for stereoscopic JPS and you'll
    likely find a lot of pictures to try with your shutter glasses.

    alt.binaries.pictures.stereo also has a decent selection of stereo images

    Good luck,
    -Noah
     
    Mr. Costington, Oct 1, 2003
    #2
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  3. Luke Scharf

    andrew Judd Guest

    Hi Luke

    This sort of thing interests me too, but i have not tried one of these
    things yet.

    However i recently went to a Imax 3D theatre where we sat about 30 to
    40 feet from the screen. The affect was very very spectactular.
    So presumably convergence and focus affects would not be so relevant
    with the goggles and presumably you could still get a very interesting
    affect?

    If each eye is seeing a different image I would say that a 'flat piece
    of glass' would not be so relevant, as each eye/brain has no idea that
    what is seen is not flat.....it just learns otherwise.

    By the way have you tried the following?

    Get 2 coins and place them in front of you on a table so the same
    face is showing and the faces are pointing in the same direction.
    Look downwards at the coins. With your strabismus you will see 4
    coins....yes? now arrange the coins so that you see either 3 coins or
    2 coins......can you do that? If you can then you already are
    capable of stereopsis.....you just need to train your eyes to point in
    the right direction. If each eye is capable of normal one eyed
    vision with the other eye closed then patching would help encourage
    each eye to track normally day to day. Following a pendulum
    suspended from the ceiling would also encourage proper eye
    coordination for each eye separately.

    Good luck Luke.....dont let anybody oblige you to believe you cannot
    see normally.....it is just a matter of figuring out what is going on.

    Andrew
     
    andrew Judd, Oct 1, 2003
    #3
  4. Luke Scharf

    Luke Scharf Guest

    I managed to improve the effect quite a bit by measuring the distance
    between my pupils and using that to set up the relative POV. Also, it
    helps to hold your head in the right place -- if you're off to the side,
    the perspective doesn't make any sense. Also, if you're head's turned
    just a bit (the shutters are about 1" square), one eye can't see the
    screen...

    I've convinced myself that stereopsis works for me and that it's worth at
    least seeing a specialist. It did take me a few days to adapt to my new
    prism glasses and wake everything up -- but the "there is no hope" speech
    that I got from the last ophthalmologis I visited probably wasn't
    accurate.

    I started downloading a bunch of games last night, so I'm going to play
    with those for a few days and have some fun. :)
    Thanks! I'll see what I can find there.

    -Luke
     
    Luke Scharf, Oct 1, 2003
    #4
  5. Luke Scharf

    Luke Scharf Guest

    I'll have to try that the next time I'm near one! With the farther-away
    screen, I'd imagine that the effect is more realistic (see below).
    Not necessarily. One of the queues that I use is knowing how far out I'm
    focused. IIRC, most head mounted displays (VR equipment) have some lenses
    to make you focus out a little farther to enhance the effect. Also, if
    things are moving and you get to see it from multiple perspectives, it's
    pretty darned easy to get a 3d picture of it.

    I'm a private pilot, with 80-odd hours, a couple of hundred successful
    landings and an equal number of successful takeoffs. I've also driven my
    personal vehicles well over 100,000 miles in various environments, without
    rear ending anyone. Having two eyes pointing at the same object is not
    the only way to perceive the world in 3d.

    Farther down, you say "don't let anyone tell you that you can't see
    normally" -- I've been doing that all my life. I'm a little more
    sensitive about it than I should be.
    I didn't used to have double vision, but it started happening every so
    often over the last couple of months. I was diagnosed with strabismus
    when I was quite young. Without glasses, I'm darned good at switching my
    dominant eye -- when I need to look left, I use my left eye and when I
    need to look right, I use my right eye.

    I definitly have fusion with the prism-glasses. The prism is divided
    between the two eyes, so there's a 3D base-out prism over each eye. When
    I drive at night, I see a streetlight, and I see a band of color on both
    sides of the light. If I close my right eye, I only see the band on the
    left side of the light. I have a similar effect when I close my left eye.
    When both eyes are open I see a band on both sides. Same thing for
    oncoming headlights, although it's harder to see since the band of color
    is often in the other car's headlights. Thankfully, the band is fairly
    dim -- otherwise, the glasses would be more trouble than they're worth.

    As for VT, my parents tried that when I was younger but it had no effect
    on the strabismus. They tried some patching too, which could have been a
    very good thing -- my "weaker" eye is quite useful. I've tried my own
    training, also with no effect. Twenty years of trying good "alternative"
    methods and having it not-work...

    I've got a pretty good idea what the patterns are and how my eyes work.
    I'm beginning to understand the relevant jargon. Time to see an
    adult-strabismus specialist (pediatric ophthalmologist?) and go from
    there.

    -Luke
     
    Luke Scharf, Oct 1, 2003
    #5
  6. Luke Scharf

    Bill K Guest

    Try http://www.edimensional.com/gallery/gallery.htm. I have these 3D
    glasses from edimensional and i think they're quite great. The
    flowers look like they are at least a foot out of the screen. I also
    have the head tracker which they call the trackIR. I use it on my
    flight sims to pan by looking around. works great, both indispensible
    items.
     
    Bill K, Oct 1, 2003
    #6
  7. Luke Scharf

    Luke Scharf Guest

    Sweet! I'll see if I can get the demos to work with my current setup (a
    used Elsa Erazor).

    The last time I looked into a head-tracker for home-use, it involved a
    Nintendo power glove and some soldering. :)

    Thanks,
    -Luke
     
    Luke Scharf, Oct 2, 2003
    #7
  8. Luke Scharf

    Luke Scharf Guest

    They work great.

    Now, I've got to build some optical illusions that work like the tests
    that they use at the doctor's office... I've just been playing
    MechWarrior 4 in stereo lately. :)

    -Luke
     
    Luke Scharf, Oct 14, 2003
    #8
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