Re: SL3D per John B et al

[T3D john bercovitz <bercov@xxxxxxxxxxx>]

I thought I ought to bring this over to T3D because it's kind of
a picky thing I want to discuss.

John B wrote:
> ....  Of course now your big problem is 
> how to separate or decode the two images; they will want to land 
> practically on top of each other and will indeed land on top of 
> each other for an in-focus object.
 
Paul Kline wrote:
> They do land on top of each other, but because they are captured
> from different perspectives they won't be identical - a common
> mis-assumption.

I was talking about the in-focus images from the two perspectives 
being exactly superimposed.  Is this what you were talking about, 
Paul?  Here's how I came to think what I said:

In the ideal camera lens (and most these days aren't too far from 
ideal) the imaging is plane to plane.  Only an object point in the 
in-focus object plane will be in focus on the image (film) plane.  
All object points not on the in-focus plane are out of focus.  OK, 
now I would contend that any and all parts of the lens focus each 
individual point of the in-focus object plane to the same individual 
place on the image (film) plane or else the thing is out of focus.  
Do you agree?  I've misread you, right?

Thanks,
John


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