Eye tracking: Difference between revisions
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The experimental sort of eye tracking usually | The experimental sort of eye tracking usually | ||
* illuminates the inside of the eye with near-infrared | * illuminates the inside of the eye with near-infrared | ||
* IR camera that | * IR camera that is zoomed in to look at just the eyes | ||
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From ''just'' the image of the pupil in the eye, you would not get a halfway decent direction. | From ''just'' the image of the pupil in the eye, you would not get a halfway decent direction. | ||
We can fix that by | We can fix that by fixing your head in place, and while "please rest your chin here" is fine, | ||
"please allow us to clamp your head in place"... makes people not like you much. | |||
Another fix to this is to also track the cornea. | Another fix to this is to also track the cornea. | ||
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Yes, and that can help, but at the same time also adds assumptions to the whole, as well as another limited-accuracy thing . | Yes, and that can help, but at the same time also adds assumptions to the whole, as well as another limited-accuracy thing . | ||
"Can you do this with a webcam?" | |||
At all? Yes. | |||
Accurately? No. | |||
You can download an app for your phone right now. And its output will be... not great. | |||
Why? Multiple reasons | |||
'''"Could I do this with an IR-sensitive webcam?"''' | |||
...plus an IR illuminator? | |||
It would work better than just a webcam, but still not great. | |||