Converting a conventional lcd tv into autostereoscopic

Discussion in 'General 3D and Stereoscopic Discussion' started by Antonio, May 14, 2010.

  1. Antonio

    Antonio New Member

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    Good morning.

    I've got a nice 42'' lcd tv. I've created a parallax barrier for 9 views. When i display still images everything goes as expected: An amazing 3D effect everyone can see. But the problem is that when I try to displays 3D movies I get wrong edge artifacts (???) that make the video display with 3D effect but with some blurring and some crosstalk. Displaying the same video on a professional 3D display everything goes fine.

    I know a tv set comes with a lot of options for image customization. I've dissabled all of them but still get wrong result. I called tv manufacturer to ask him what else can I do and the answer is: A tv set it's not a monitor (Sure it is not!, cheaper, tuning, etc).

    The question it's what can i do to show on display exactly what my video card it's generating.

    Thanks in advance!
     
    Antonio, May 14, 2010
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  2. Antonio

    Ian Administrator Staff Member

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    Hi Antonio! Is this a parallax barrier you have created yourself? If so, good work!

    I suspect that the blurring and crosstalk are due to alignment tolerances and light leakage. Light leakage is often minimised during commercial devices by using a light limiting film or other filters.

    It could also be that the TV set panel isn't as responsive and the ghosting becomes very visible when used in a parallax setup.

    Which TV are you using and I can look up the specs. I'd be very interested in knowing a little more about the barrier too :)

    Welcome to the forums! :D
     
    Ian, May 16, 2010
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  3. Antonio

    Antonio New Member

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    Hi Ian!
    Thank you!

    The TV I'm using is LG 42LF2510. When I use a LCD monitor like Samsung SyncMaster 2433 and I put the barrier according to its dimensions everything goes fine (... the only problem is that for nine views the display becomes too dark, so I'll build a five views parallax display). But when I use and lcd tv and the image is moving... wrong! I've got a lenticular sheet from a professional autostereoscopic display and put it on the tv... same results: Good visualization for still images but when video is played: blurring artifacts, blue color on BW images...
    I thing light leakage can be one reason but I'm afraid image processing inside the tv can be another cause. I've tried to dissable all setting in the menu but it seems there's something more I can't guess. I called LG to ask and the answer was: TV is not a monitor. (One example: When opening paint and drawing a single red line, when incrementing contrast I get another white line closed to the original red)

    I once thought on doing some sort of inverse treatment on the image...

    Talking about the barrier itselft, just tell me the display dimensions and pixel pitch and I'll give a nice .tiff file to print.;)

    Thank you!
     
    Antonio, May 17, 2010
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  4. Antonio

    Ian Administrator Staff Member

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    It sounds like you really know what you are doing, so I'm not sure what else I can suggest :) I've got an LG TV too (47lg7000) and that does seem to do a lot of extra image processing, but if I set the input label to "PC" is disables things like the 100hz mode and some of the other processing options.

    I'm not sure what I can recommend, but good luck in getting this to work :D
     
    Ian, May 17, 2010
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  5. Antonio

    Antonio New Member

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    Hello again.

    All recomendations and ideas are welcome. At this moment I don't know what else can I do.:confused:
     
    Antonio, May 17, 2010
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  6. Antonio

    Antonio New Member

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    Still alive... I'm working on some pixel's preprocessing before interlacing images.... Help is still needed!.
     
    Antonio, May 24, 2010
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  7. Antonio

    Ian Administrator Staff Member

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    I'm all out of ideas Antonio, but if I think of anything else I will post back here and let you know :). Hopefully someone else will see this who knows a little more.

    Good luck! :D
     
    Ian, May 26, 2010
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  8. Antonio

    Hornet New Member

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    Hi Antonio
    are you able create 2 view barrier or lenticular (prismatic) foil for 24" monitor? I need cheap autostereo monitor for my experimetal work with live video 3D stereoscopic eye microsurgery recording. The Tridelity display is for my first attempts too expensive.
     
    Hornet, May 27, 2010
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  9. Antonio

    Hornet New Member

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    Hi Antonio,
    isnt your problem in different pixels orientation (pattern) on TV and monitors?
    Can you help my with creating of 2 view barrier for syncmaster 24" 1920x1200 monitor?

    Thx a lot
    Peter
     
    Hornet, May 27, 2010
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  10. Antonio

    Antonio New Member

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    Hi Hornet.

    Sure I can help you. Just tell me the monitor model. You know on 24'' you don't exactly get that measure. For example, my SyncMaster 2433 is exactly 23'6 '' diagonal. Then, you get pixel pitch, print it and voila.

    I'm sure you know two view autostereoscopic barrier well be very difficult to use; if you move you head just 3 cm you'll get inverse depth information... Anyway, if you need it, just give me the info I asked you before and I'll send you a nice .tiff file to print on a foil (Later I'd give you a few spec about viewind distance, etc)

    Maybe you can be interested in making a stereoscopic monitor with a pair of cross polarized glasses an some cellopane... and your syncmaster, of course!
    ...believe me, it works!
     
    Antonio, May 29, 2010
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  11. Antonio

    publicity New Member

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    Hello Antonio,

    I just read your messages today about converting a standard lcd into autostereoscopic. I've been doing some research online for some help on this subject, but cannot find a way to do it; many people talk about it, but none of them actually had success. However I noticed that you had great success on still images.

    I'm currently doing my final year at University, and my project is based on stereoscopic vision - so if I can do an experiment based on autostereoscopic that would be amazing :) I would really appreciate if you can help me with this project with some guidance. Can you give me your email if possible, so we can correspond better? I can also post my progress here so that other people can see the project develop and do some experiments themselves.

    I'm suppose to build a video at the end of my project based on anaglyphs with glasses, but as an experiment I can include some stills using your autostereoscopic technique without glasses - that will surely help me achieve a good grade.

    Best Regards,

    David

    p.s. my email is : autostereoscopic@gmail.com
     
    publicity, Jun 6, 2010
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  12. Antonio

    Sly New Member

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    Location:
    lille France
    hi there
    is it possible to know where did you buy your lenticular sheet?
    thanks
     
    Sly, Jun 24, 2010
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  13. Antonio

    Antonio New Member

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    Antonio, Jun 24, 2010
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  14. Antonio

    SpAiK New Member

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    Let me resume this topic that have casually found and is very interesting.

    So basically there are two methods for autostereoscopy, parallax barrier and lenticular lens. Parallax could be done printing a pattern on a transparent sheet, but lenticular sheet is harder to get.

    BTW, what about converting a monitor to use with polarized glasses? Could it be done?
     
    SpAiK, Jul 23, 2010
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  15. Antonio

    Antonio New Member

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    Sure. Just do this quick experiment: Get a piece of cellophane and put in anywhere in front your LCD. Now get a linear polarized glasses and see what happens when you open the right eye and later the left...
     
    Antonio, Jul 29, 2010
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  16. Antonio

    digital123 New Member

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    Dear Antonio I have a viewsonic 28" lcd what pitch should I print , I already have all the good lenticular software, please help.

    Muneer
     
    digital123, Oct 30, 2011
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