optical illusions

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RichD

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May 12, 2022, 2:28:03 PMMay 12
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I picked up book of optical illusions recently. Mostly
color plates, very clever.

They fall into three classes, roughly:
i) "hidden picture": the demon becomes an angel,
when the picture is rotated
ii) impossible structures, a la M.C Escher
iii) jumping structures: a 3-D object jumps between
two orientations, before your very eyes!

I wonder, could one write a program, to analyze and
recognize cases (ii) and (iii)? Can we describe them
mathematically? This is really a computer vision problem,
but still of interest to opticians.

--
Rich
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