P3D Re: PePax Challenge

[abram klooswyk <abram.klooswyk@xxxxxx>]

I wrote: 
>Geometrically, the stereoslides made with the Super Duplex 
>(base 30 mm) should show gigantism, with everything two times 
>enlarged. This is not the case, enlargement is hardly noticeable,
>only a somewhat diminished depth effect compared with the normal base.

George Themelis wrote (PHOTO-3D Digest 2918, 23 Aug 1998):
>I do notice a gigantism when I see these pictures (but not twice
>enlarged).  Being familiar with the subject can be a problem
>(i.e. we know how large people are).  But what happens when we
>see an unfamiliar image?

And with base of 15 mm? and 6 mm, and 3mm, and 1 mm, and .1 mm? 
Do you see more and more gigantism (but not 4, 10, 20, 60 or 600 times 
enlarged)? No, you see the total collapse of a geometrical theory which
is not controlled by perceptual facts. 
Seeing unfamiliar images will not help :-)
This is common knowledge which we sometimes tend to forget in discussing 
geometrical concepts.

Abram klooswyk


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