[sldev] Anyone here with OpenCV experience?

[Jan Ciger]

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Moriz Gupte wrote:
> The clip here provides some answer.
> http://www.youtube.com/watch?v=nQDdgrgkqh4
> Looking at it again, I had a (what was I thinking feeling-) wonder what
> the kids must have felt going into that...anyway..
> But yes, the eye tracker had an inbuilt servo mechanism that tracked the
> head motion and moved the camera that was looking at the eye so that it
> would always be at the center. Of course, it just provides *some*
> opportunities for move the head a bit (you cannot go completely relaxed
> and move your head wildly...we used some seats that constrained to some
> extent head movement

Eew, what a contraption! Well, still better that the idea my former
students had - they wanted to build literally a head "vice" to keep the
user's head still :-p It is a pity I do not have the proposed sketch
scanned, that was some piece of usability engineering right there :-p

> Right on. I am with you here. definitely gaze/head avatar navigation
> control is *very likely going to cause more problems* unless u are
> moving into the 'assistive technology' arena where the user has a
> mobility impairment. There is some wiggle room for cam control *I
> think*... I have some ideas...but just speculations at this stage. This
> whole head/gaze based UI is really a toughie... we need to design an
> intelligent enough system that would separate 'unconscious' reflexes
> from 'intentional ones'... that's a hard prob.

We have tried some of this before, but it is extremely tiring - there is
no "offline" or "relaxed" posture. As the system keeps tracking you all
the time, it will always end up in a mess which is very frustrating for
the user. Even for assistive purposes there are better solutions than
pure gaze tracking (breath sensors, tongue controllers, EEG, EMG sensors
...).

But we are getting off-topic here, I think :)

Regards,

Jan
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