Visual Singularities


Cusp singularity on the apparent contour. This is stable.

Moving Cusp Video (169k)


`Beaks' transition where the view direction is asymptotic at a parabolic point of the surface.


`Lips' transition where the view direction is asymptotic at a parabolic point of the surface.


`Swallowtail' transition where the view direction is asymptotic and has an extra point of contact.




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