P3D Re: Cardboarding

[michaelk@xxxxxxxxxxxxxxxxxx (Michael Kersenbrock)]

> >From the quotation:
> >        If we maintain a proportional increase between base and
> >magnification, the type of reproduction closely approximates that of
> >orthostereo. We reproduce the objects at their full natural telescopic size,
> >and with that distance and degree of relief which is fully natural for that
> >size. Thus if the lenses are doubled in focal length and the base is also
> >doubled, objects are shown in the size and relief normal to a distance which
> >is just half that of their true distance.
> 
> Now, I specifically remember a very lengthy series of Posts, this past
> summer, that seemed to conclude (with as much consensus as is possible on
> P3D - namely, not much) that one cannot in fact approach ortho imaging of a

Note that McKay did *not* say that it *became* ortho at any point, in 
fact later on down in the quote it says something explicitely to that
effect.  Even above he talks about approaching an approximation and then
goes on to explain the details of what he means by approximation.

People may argue how far away one can be and still be "approximate" 
as opposed to being "in the neighborhood of" or "somewhat approximate"
or "kinda like" or "not terribly like", or "not really, but a little-bit
like", or other exact description categories of "near-ortho".  But....

The point of my McKay quote was that the telephoto'd object can show depth
(related to the previous thread).  Even if it's NOT true "ortho".  :-)

Mike K.




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End of PHOTO-3D Digest 2541
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