Re: PHOTO-3D digest 1543

[P3D Bob Wier <wier@xxxxxxxxxxxxxxx>]

>
>Now, do you stare straight ahead and look _through_ the two views or do 
>you cross your eyes and look in _front_ of the two views?  Either way I'll 
>need the Tylenol bottle after a few minutes :-)
>
>Ron

Freeviewing is simple once you get the hang of it (like riding a 
bicycle :-)

You position your eyes so that they are looking at a point
at infinity (ie, parallel axis, not converging) but FOCUS 
at the distance where the card is positioned. Since one only normally
focuses at infinity when you are looking at infinity, this is
initially difficult. 

This is of course assuming that the two views are not more widely
separated than your pupil to pupil spacing. If they are, then you
need to go "wall eyed" which is considerably more difficult.

Me, I had a HARD time doing "cross eyed" views until about a year
ago when someone suggested cutting two holes in a piece of paper
and holding it so each eye could only see the image on the other
side. Once I "felt" what it was like to do it, then I can manage
without problems.

If you want to look at a 3 panel image set up for both cross
eyed and "free viewing" (assuming your monitor will display
an image of the correct size) take a look at 

http://bobcat.etsu.edu/~wier

THANKS

  -------- Bob Wier ----- wier@xxxxxxxxxxxxxxx -----
         4:41 PM Wednesday, September 18, 1996 
      Texas A & M University - Commerce
   keeper of the Motorola MC68HC11, ICOM Radio, 
Photo-3D,  Overland-Trails mailing lists and the 
     LDS Genealogy State Research Outlines 



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