Eyetracking for the iPhone?

Question

Has anyone experimented with eyetracking for the iPhone or heard of projects related to eyetracking in iOS?

Is it technically feasible at all?

How problematic would recording that data be in the light of ongoing privacy discussions?

Answer 1

There is a technique introduced by Johny Lee

I found this, that applies such technique.

Head tracking for iPad

Hope you find it useful.

Answer 2

I think this is feasible as long as the phone's camera is pointed at the user's head. It would probably require pretty good light for the image to be crisp enough for it to be able to recognize the face and eyes properly, though.

When the user isn't looking directly at the camera, you would probably need to do some sort of "head recognition" and determine the orientation of the user's head. This would give you a rough direction on where they are looking.

I'm not aware of any face recognition related projects for iOS, but you could probably google and find some existing project in some other language and port it to iOS with a bit of effort.

As a side note, there's a DIY project for the head orientation tracking part for PC. It uses infrared lights placed for example on your headphones and a camera which determine the orientation of your head based on that. Perhaps it'll give you some ideas.