Re: 3-D phenomenon

[P3D Allan Woods <allanwx@xxxxxxxxxx>]

>
>When I look out a window at a distant scene, I see depth, yet all the
>objects are in focus.  I find just by looking out the cubicle in which
>I now sit that things beyond about 10ft away are in focus. 
>
>	-Greg
>
True, but if you took a "Realist' picture of that distant scene, there
would be no discernible depth in the distance - that is why optimum
subject distance is approx. 7 ft. and put something in the foreground.

I'm not saying the 'Realist' way is the wrong way, just one way that
uses some of the depth clues our brains interpret.

YOU can tell depth in the distance because of another 'depth' clue -
that things father away are less chromatically intense.  You also know
mountains are far away.

I was in the desert not long ago looking at HUGE piles of HUGE boulders
some half-mile away.  I could not tell where the canyons and ridges were
between the bolder foothills.  Look through binoculars or walk there
and in fact there were a series of ridges.

In that case, it would be possible (necessary) to separate the taking
lenses for hyper-stereo to make maximum use of distorting the interoccular
clues to allow us to see the depth.  Ever see those binoculars they used
to have on ships where the objective lenses were about 2 or 3 feet apart?
Boy, I'd like to have a pair of those!

What I was saying is that there are many ways to get the 'depth' information
and 'out of focus' should not be discarded as just 'noise.'  If you
provide a means for your brain to interpret the focus information, it
is possible to percieve that 'depth' thing which is the 'illusion' of
3-D.

Things have their optimum applications - you wouldn't use those ship
binoculars as a disecting scope - but you could never tell which ship
was father away looking through regular binoculars either...

thanks for the response - and keep looking out the window!  The 3-D
you'll see there is damn near as good as one of Dr. T's slides!

allanwx@xxxxxxxxxx



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