[sldev] Anyone here with OpenCV experience?

Moriz Gupte moriz.gupte at gmail.com
Thu May 21 17:54:13 PDT 2009


>
> I wonder - how did you deal with the issue of having to hold the head
> still? Or did you track that as well? If the head moves, the whole gaze
> information is not valid unless the movement is tracked as well.


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

>
> However, using gaze to control anything (camera, avatar, whatever) is
> extremely bad idea - it is really tiring and eye movement is not
> something people can consciously control. Someone speaks next to you and
> you turn your head reflexively - throwing the whole system for a loop.
> At best it could be used to determine what you are looking at passively
> and use that for either some kind of feedback, perceptually-enhanced
> rendering or just to make the av look at the same thing to improve the
> facial expressions for the others looking at you.


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.


>
>
> Regards,
>
> Jan
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-- 
Rameshsharma Ramloll PhD Research Assistant Professor Idaho State
University, PocatelloTel: 208-282-5333
More info at http://tr.im/RRamloll
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