[photo-3d] Re: again those figures!!!

["Abram Klooswyk" <abram.klooswyk@xxxxxx>]

Oleg Vorobyoff wrote (Jul 19, 2000):
>I understand now that 2° convergence is a recommended (but
>not absolute) maximum for viewing stereo pairs, especially under 
>projection.
>I still do not understand why greater convergence is difficult to 
>view, considering that we routinely look at things with 12° 
>convergence and more, for example, while reading.  

I must repeat that it is NOT the absolute amount of convergence
but the DIFFERENCE in convergence angle which counts.
When reading a flat book there might be no significant difference 
at all, regardless of the distance at which you hold the book.

>(...) perhaps the center portion of a fisheye image, enlarged to 
>fill the frame, could be comfortably viewed despite greater than 
>recommended convergence.

As in any stereopair this wiil depend upon the DIFFERENCE in
convergence between looking at the farthest and the nearest points 
of the scene. The angle which your eyes swing from looking at the
distant points to the closests points, that angle counts.

Abram Klooswyk