[visionlist] geometrically ambiguous images

Daniele Zavagno dzavagno at danzava.org
Mon Feb 13 07:57:14 GMT 2006

Dear Ben,

the Necker cube is more a reversible figure than an ambiguous one: it  
changes orientation in space, but its apparent 3D structure remains  
the same. Ambiguous figures are those images that, given one  
stimulatory array, show two or more possible coherent percepts (like  
Rubin's cup-profiles figure, or Jastrow's hare-duck).

Good luck

Il giorno 12/feb/06, alle ore 13:21, B.T. Irvine ha scritto:

> 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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