[visionlist] geometrically ambiguous images

Laurence Harris harris at yorku.ca
Tue Feb 14 19:46:40 GMT 2006


> There is a sculpture by Anish Kapoor, exhibited at the Hayward Gallery
> in London last decade, which provokes a tri-stable perception.
> >From memory, the sculpture is of a large (1m+) smooth greyish
> >boulder, with
> a roughly hemispherical hole (30cm diameter) excavated into it. The
> interior of the hole has been meticulously painted with light-grey
> pigments of varying lightness. Three percepts are possible:
>  As a light-grey painted patch on the boulder's surface
>  As a translucent window into the boulder's interior, which is lit.
>  As a hole.
> Lewis Griffin
> Computer Science
> University College London
> UK
> >I wonder if you may be able to help me with a brief query. I am a PhD
> > student in the History and Philosophy of Science Department at
> >Cambridge University. I have recently become interested in the Necker
> > Cube as it provides an interesting analogy for certain cases in
> >philosophy. I am trying to find out two things with respect to the
> >Necker
> Cube:
> >
> >(1) are there any geometrical images which are TRIPLY ambiguous in
> >the way that the Necker Cube is doubly ambiguous, where the
> >transitions between ambiguities are obvious, regular, and spontaneous
> >(i.e. not dependent upon "effort")?
> >
> >(2) is there a name (or names) for the CLASS of geometrically
> >ambiguous images which includes Necker Cubes as well as some other
> >nameless geometrically ambiguous forms I have encountered in the
> >past? If there is such a term for this class, I would be interested
> >in finding it out as I may be able to mutate it into a philosophical
> >"-ism" which would express the sort of position I am developing in my
> >thesis.
> >
> >Thanks for taking the time to read this. I hope you might be able to
> >help! _________
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