Adaptive camera and illuminator eyetracker
AssigneeTobii AB
InventorsPeter Blixt, Gunnar Troili, Anders Kingbäck, John Mikael Elvesjö, Märten Skogö
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Abstract
A method includes obtaining an image of an eye in a bright-pupil imaging mode in which a retinal retro-reflection complements the image of the eye in the bright-pupil mode, and obtaining an image of the eye in a dark-pupil imaging mode in which a cornea-scleral retro-reflection complements the image of the eye in the dark-pupil mode. One of the bright-pupil imaging mode and the dark-pupil imaging mode is selected based on quality of obtained images.
Claims20
A method comprising:
- obtaining a first image of an eye in a bright-pupil imaging mode, the first image comprising a retinal retro-reflection;
- obtaining a second image of the eye in a dark-pupil imaging mode, the second image being different from the first image and comprising a corneo-scleral retro-reflection;
- and
- selecting, based on a comparison of a first quality of the first image and a second quality of the second image, one of the bright-pupil imaging mode and the dark-pupil imaging mode;
- tracking, by an eye tracker, the eye based on the selected imaging mode.
An eye tracker controller comprising:
- a processor configured to:
- obtain a first image of an eye in a bright-pupil imaging mode, the first image comprising a retinal retro-reflection,
- obtain a second image of the eye in a dark-pupil imaging mode, the second image being different from the first image and comprising a corneo-scleral retro-reflection, and
- select, based on a comparison of a first quality of the first image and a second quality of the second image, one of the bright-pupil imaging mode and the dark-pupil imaging mode;
- tracking, by an eye tracker, the eye based on the selected imaging mode.
An eye tracker comprising:
- a plurality of cameras for imaging an eye, with at least one camera being arranged to image the eye in a bright-pupil imaging mode, and with at least one other camera being arranged to image the eye in a dark-pupil imaging mode;
- and
- a controller configured to:
- obtain a first image of the eye in the bright-pupil imaging mode, the first image comprising a retinal retro-reflection,
- obtain a second image of the eye in the dark-pupil imaging mode, the second image being different from the first image and comprising a corneo-scleral retro-reflection, and
- select, based on a comparison of a first quality of the first image and a second quality of the second image, one of the bright-pupil imaging mode and the dark-pupil imaging mode;
- tracking, by an eye tracker, the eye based on the selected imaging mode.
A computer-program product comprising computer-readable instructions, which when executed on a general-purpose computer, causes an eye tracker to perform the following:
- obtaining a first image of an eye in a bright-pupil imaging mode, the first image comprising a retinal retro-reflection;
- obtaining a second image of the eye in a dark-pupil imaging mode, the second image being different from the first image and comprising a corneo-scleral retro-reflection;
- and
- selecting, based on a comparison of a first quality of the first image and a second quality of the second image, one of the bright-pupil imaging mode and the dark-pupil imaging mode;
- tracking, by an eye tracker, the eye based on the selected imaging mode.
Dependencies are inferred from the claim text.