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  • Vicon MX and ASL Gazetracker compatibilty

    Hello All

    We are using a Vicon MX system in conjunction with an ASL Gaze tracking
    system to capture both kinematics and eye movement data.

    Anyways, our problem is this: The gaze tracker etc is working fine when used
    on its own, calibration etc isn't a problem, however once the Vicon
    cameras are on we appear to obtain multiple bright spots on the eye which
    clearly is affecting subsequent operation of the gaze tracker -it appears
    that the gaze tracker in picking up multiple light sources from the cameras.
    This source seems to be from the cameras themselves and not the green leds
    since these have been masked over. I wonder if anyone has encountered this
    problem before, and if so do you have any suggestions on how to alleviate
    this. Obviously we are trying moving cameras positions etc, but for
    a number of our studies, this really isn't an option since we start to get
    marker occlusion. We have tried various options in the
    Workstation software such as lowering strobe intensities etc..but the
    problem persists.

    The problem didn't appear to be there with our old 500 Vicon system..but
    maybe this
    was due to the relatively small number of cameras used rather than the IR
    itself?

    It may well be that the two systems are not compatible due to this...I'm
    hoping this isn't the case!!

    Any suggestion are gratefully received.

    Thanks

    Jon Spriggs

    SPORTEX

    University Of Birmingham

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