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FW: Character Input w/o using Hands, Voice etc.

Tracking the eye with a camera is an interesting idea but it might 
interfere with the head-mounted display.  What if you could project an 
IR grid or dot pattern on the eye then use a IR CCD camera to pick-up 
the image; You should be able to see a distortion in the pattern 
caused by the bulge of the cornea.  As an added bonus, it should be 
possible to measure the curvature of the cornea to calculate the eye's 
focal length.  So that it wouldn't interfere with the HMD, an optical 
splitter could combine/split the images.

----------
From:  R. Paul McCarty[SMTP:]
Sent:  Monday, April 20, 1998 8:21 AM
To:  Bill Nordstrom
Cc:  
Subject:  Re: Character Input w/o using Hands, Voice etc.

On Sun, 19 Apr 1998, Bill Nordstrom wrote:
> For hands-free, voice free, pointer direction the best approach IMO 
is to
> develop an eye tracking solution.  This would require a camera or 
low power
> laser within the hmd that would follow the movement of the eye. 
 I've also seen
> experimental implementations of this that use a contact lense 
containing a thin
> wire in its periphery to aide in tracking.  I also remember seeing 
something in
> the movie "Blue Thunder" about how the comanche helicopters have an 
eye tracking
> system in the helmet so the pilot just has to look at something to 
target it.

There are easier ways to track the eye than using a laser, I know 
some
people doing vision research at the university of Rochester, and they 
are
using just plain old video grabbed from a miniature camera mounted on 
the
head to track the eye.  The eye is also very easy to track if you
illuminate it with IR light.

-Paul

R. Paul McCarty / DARS Coordinator /  / 
x52059
317 Lattimore Hall, University of Rochester, Rochester, NY 14627
Computers don't make mistakes;what they do,they do on 
purpose.-Dale/KOTH

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