Re: Viewing angle

[T3D john bercovitz <bercov@xxxxxxxxxxx>]

Jeremy wrote:

> To a good approximation, human visual resolution drops   
> off as the reciprocal of the angle from the optic axis. 
> (linear resolution proportional to (theta+1)^-1)
> This assumed photopic lighting conditions, where   
> cone-mediated vision dominates, and monochrome stimuli.

Stupid question, no doubt: Where'd the +1 come from?
Some kind of curve-fit?

Thanks,
John B


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

End of TECH-3D Digest 228
*************************
*************************
 Trouble? Send e-mail to 
 wier@xxxxxxxxxxxxxxxxxxxxxxxx 
 To unsubscribe select one of the following,
 place it in the BODY of a message and send it to:
 listserv@xxxxxxxxxxxxxxxxxxxxxxxx 
   unsubscribe photo-3d
   unsubscribe sell-3d
   unsubscribe overland-trails
   unsubscribe icom
 *************************