P3D Re: DIRDS not SIRDS

[wier@xxxxxxxxxxxxxxxxx (Bob Wier)]

>I'm sure a half dozen people will jump on this... they were DOUBLE image
>random dot stereograms, not Single Image Random Dot Stereograms. I remember
>the article, I was in high school and it renewed my interest in both
>psychology and 3-D! Today I have a doctorate in psych and a room full

Well, I tell 'ya by cracky, these young'uns have no respect for their
elders nowadays :-)

DIRDS vs SIRDS explains my confusion. They pointed out...

"...we used the computer-generated stereograms developed by Bela Julsez
of Bell Telephone Labs [P.T., July 1968]. Each stereogram consists of
a pair of random-dot patterns. When a person looks at these patterns
through a stereoscope, which presents one pattern to the right eye and
the other pattern to the left eye, he sees a figure emerge in depth. When
he looks at the random-dot patterns without the stereoscope, he can
see neither figures nor depth."

Thanks!

   ====== wier@xxxxxxxxxxxxxxxxx ======
  12:50 AM Friday, December 26, 1997
   keeper of the Photo-3d and Overland-Trails
       mailing lists and other stuff
     (currently in Ouray, Colorado)



------------------------------