Re: The problem with Pulfrich

[P3D John Bercovitz <bercov@xxxxxxxxxxx>]

Larry B writes:

> Well, I was being precise in the use of words. The camera was panning,
> rotating about a vertical axis, to follow an actress who was walking through
> a park area. The result was that she stayed relatively unmoving in the
> center of the picture while the background composed of trees, grass and
> other people, moved steadily past. That does in fact result in a definite
> Pulfrich effect if you are wearing the sunglass lens over the appropriate
> eye. 

Now I see what you mean.  Sure.

> If I had been watching it on a high resolution movie screen, she would
> have appeared to be flat like a cardboard cutout and still would have
> appeared to be walking *in front of* the other objects in the park. The
> reason for the flatness was that she was not walking in a straight line but
> in an arc which kept the same side of her in the same perspective to the
> camera. 

Gotcha.

I was thinking of the conventional Pulfrich setup (if there is such a thing) 
and completely missed your arrangement.  I withdraw my objections.

John

(That'll teach me to think conventionally around this group!)


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