T3D Re: confused (again)

[Bob_Maxey@xxxxxxxxxxxx]

I think part of the problem is a difference in describing the same thing.
And do not take offense, I simply want to be clear on this. BTW: Nice web
site, interesting information. When I am talking about single lens systems,
I am talking about the use of a single camera and a slide bar. I think this
is how many/most people who take stereo photographs also look at it. We
have only 2 basic stereo methods available to us. Stereo cameras and single
lens cameras with some provision for shifting viewpoints. Granted, there
are the multi-lens Lenticular devices, but still, the final result is a
left eye image being presented to the left eye and a right eye image
presented to the right eye. Then there is holography, a different principal
altogether. And the various split filter anaglyphic systems and the lenses
with prisms, mirrors or other devices. These are non single lens systems,
they use optics or filters to somehow provide a left and right eye view.

>>"The stereo information of the single lens system is not subject to:
keystone
>>distortion; optical incongruities; distinctly resolved and focused double
>>foreground and background images; nor eye fatigue associated with
>>dual-lens 3-D systems."

I disagree. Any image, regardless of what camera is used to make it, is
subject to Keystone effects. Any stereo cameras will also produce this as
well. Keystoning happens usually because the camera is tilted to some
degree. I have yet to see any problems such as you describe above with
either single or dual lens systems. If these problems happen, they are
because of faulty technique, defective requirement, poor mounting, etc. In
fact, given everything being equal, I can take photographs of all types of
subjects and you will be hard pressed to tell which were made with a stereo
camera or a camera on a slide bar.


>>"Single lens stereo systems record dimensional information in a scene
from a
single vantage point. With single-lens 3-D there is zero binocular
disparity; stereo pairs are singular at the plane of interest and made up
of
common points of focus.


This is confusing to me for this reason. It is absolutely true that a
single lens camera captures the scene from a single vantage point. But it
is also true that each lens in the stereo camera does the same thing. I
believe that you believe that there is some magical difference in
fundamental stereo simply because a stereo camera is used. I say again,
what you are doing with a stereo camera is EXACTLY the same thing you do
with a single lens and a slide bar. No difference; the stereo camera is
simply more convenient.




RM



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