EYE-TRACKING USING A GPU
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Accused Products
Abstract
Provided is a method of determining a gaze point of an eye watching a visual display controllable by a display signal. The method comprises generating a display signal using a graphics card in order for the visual display to produce a screen pattern; receiving a signal encoding an image of the eye including a corneo-scleral reflection of the screen pattern; and determining, based on in part the geometry of said reflection, a gaze point of the eye, wherein said determining a gaze point includes utilising the graphics card as a parallel processor.
The image of the eye may be received directly at the graphics card. The graphics card may extract image features in the eye images. Reference illuminators may be used, and the screen pattern may be interlaced with a distinctive reference pattern.
Further provided are a gaze-tracking system and a personal computer system adapted to determine a gaze point of a viewer.
44 Citations
36 Claims
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1-17. -17. (canceled)
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18. A method of determining a gaze point of an eye watching a visual display controllable by a display signal, the method comprising:
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generating a display signal using a graphics card in order for the visual display to produce a screen pattern; receiving a signal encoding an image of the eye including a corneo-scleral reflection of the screen pattern; and determining, based on in part the geometry of said corneo-scleral reflection of the screen pattern, a gaze point of the eye, wherein said determining a gaze point includes utilizing the graphics card as a parallel processor. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 32, 34)
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27. A gaze tracking system, comprising:
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a visual display controllable by a display signal; an imaging device adapted to image the face of a viewer of the visual display; and a graphics card adapted to generate a display signal for causing said visual display to produce a screen pattern, said system characterized in a gaze-point determining module adapted to use the graphics card as a parallel processor to determine a gaze point of the viewer'"'"'s eye based on in part the geometry of a corneo-scleral reflection of the screen pattern using an image of the viewer'"'"'s eye containing said corneo-scleral reflection of the screen pattern, said image being received from the imaging device. - View Dependent Claims (28, 29, 30, 31, 33, 35)
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36. Use of a graphics card in a computer system determining the gaze point of an eye watching a visual display, for carrying out at least the following tasks:
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providing a display signal to said visual display causing this to produce a screen pattern; receiving an image of the eye including a corneo-scleral reflection of the screen pattern; and assisting in determining a gaze point of the eye based on in part the geometry of said corneo-scleral reflection of the screen pattern.
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Specification