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Improved algorithms and a more confident operator...

Comments

  1. Roberto9 December 2009 at 12:28

    Like all your other videos, this is yet another very impressive demonstration.
    Do you use ordinary IR LEDs or are they some special IR LED with wide viewing angles?
    Do you use IR-pass filter infront of your web camera?
    Thank you.
    Roberto

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  2. William Thielicke9 December 2009 at 12:35

    Hi Roberto,
    these are ordinary high power IR leds (100mA). Each of the markers consists of 5 of these LEDs. I sanded the heads of the LEDs, so that they emit light with a wider opening angle.
    My IR-filter consits of a negative photographic film (black, therefore no transmission of visible light, but quite good transmission of IR light).

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  3. Roberto9 December 2009 at 13:50

    Dear William,
    Thank you for the explanations.
    In a ground based IR tracking experiment, I have also used similar approach; I cut/scratched grid like pattern on the IR LEDs surface.

    "LED lenses" on the following link (http://www.cutter.com.au/categories.php?cat=Optics+for+Power+LEDS)may be interesting for you. I did not use those lenses and I don't know if they are transparent in IR wavelength.
    Thx
    Roberto

    ReplyDelete

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