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OPT8241: Human Eye Angle Detection

Kyle Kreth
Prodigy 20 points
Part Number: OPT8241

I would like to know if TI has a sensor that would be small enough to fit in a pair of glasses, but could be used to measure the location of the Iris. It may be necessary to have two sensors per eye for FOV coverage. Since the eye has a definitive "shape" it might be less compute intensive to use TOF instead of optical/graphical determination. Any help in this regard would be much appreciated.

  • 0
    TI__Expert 3495 points
    TI 3D-TOF solution definitely can be used. However, it is unclear to me why 2D imager is insufficient for iris tracking? Is there a reason why you need depth information to track iris?

    -Larry
  • 0 in reply to Larry Li
    Prodigy 20 points

    Only from the perspective of difficulty in tracking. One complication is that iris size changes dynamically, the other is that tracking in low light optically could be prone to higher error rates. Even though the shape of the eye could be obscured somewhat by the eyelids, the shape does not vary, so you can track at least part of the shape when obscured by the eyelid. 

    The T1 3D-TOF lists the minimum distance as "1 meter"  which will not work with an eyeglasses implementation that would at most have ~2 inches of space. Is there a way to overcome this minimum distance that is not listed in the spec sheet?

  • 0 in reply to Kyle Kreth
    TI__Expert 3495 points

    TI 3D-TOF can theoretically operate down to 0, but there other practical limitations, such as how closely sensor and illumination can be placed, and whether illumination is capable of fine dimming, etc.

    Use the system estimator tool to see if you can come to your own conclusion.  This video explains how to use it to do trade offs.