Re: Computer Compositing

[T3D john bercovitz <bercov@xxxxxxxxxxx>]

> I thought his friend was mainly theorizing about what could be 
> done in a computer with flat images to make them 3D. 

Well now that you mention it, I'm not sure.  Here's what Michael
wrote:

> One friend of mine, B.D., who has been making stereo photographs 
> since before I was born, supposed that all one needed to do to 
> turn a flattie into stereo, would be to scan a photograph, 
> rotate it a degree or two, scan it again and rotate it the other 
> way a degree or two.  I explained that the result would look 
> like a perfectly flat photograph that had been curled around a 
> vertical axis.  Each eye would see exactly the same information, 
> however, a distortion field would be present that would cause 
> curvature of the plane.

I interpreted this to mean that he tilted the flattie in the 
scanner: one direction to get a left view and the other direction 
to get a right view.  But I may be way off base here.  Only 
Michael can tell and he ain't talkin'.  8-)

> Every simulation of keystoning (the result of his original 
> thought) that I create in the computer results in a rotated but 
> still flat plane that represents the original photo.

Now that's interesting and I think some of your suggestions as to 
why this might be are quite likely the reason.  Perhaps, as you 
say, the amount of keystoning is not noticeable.

John B


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