T3D Re: confused (again)

["William J. Carter, Ph.D." <wc@xxxxxxxxxxxx>]

At 06:24 PM 10/6/98 -0600, Bob Maxie wrote:

>So what is missing between the lenses of a dual lens camera? Forgive me,
>perhaps I am slow. 
Yeah, right! :-)

>If I take a photograph with my Stereo Realist and a
>photograph using my slide bar with my M3, I am going to achieve about the
>same thing. Ignoring, naturally the slight differences between lenses, and
>film, exposure, lighting and providing that the subject is the same. The
>reply is a bit confusing to me. What possible information do you consider
>missing?
There are 4, fairly distinct approaches to SL3D that I know of, which, if
you're interested, I've out lined at:
http://www.creative.net/~wc/history.htm
When I coined the phrase, I was mostly thinking of a single, bifurcated,
aperture stop, focusing on a single image plane. This is what *I* mean by
"Single Lens 3-D". The dynamic, as I see it, is that SL3D is effective
because the brain finds "self similarity" between the sizes of the Circles
of Confusion, instead of "self similarity" between edge boundaries. One
significant difference between the two approaches is that there is no loss
of valuable 3D information between distinct left and right views. There are
no "distinct left and right views" with SL3D. Nor are there any, what I'd
call dual lens artifacts... 
For those not familiar with the litany:
"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. Likewise, foreground and background objects are
formed by converging or diverging rays with respect to the plane of
interest. There is no decoupled relationship because no second set of images
exists. The system is free of double image distortions and cross talk except
as blurred, out-of-focus images which tend to direct the viewers zone of
attention to the plane of interest. Single lens stereo offers increased
productivity without a need for any "learning". It is not uncommon for SL3-D
observers to see stereo for their first time." 

"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." 

>... So, again I ask you to indulge me
>and tell me the differences. 

Was I clear Bob? Or just redundant :-(


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