Cite as:
Kitaoka A, Sato T, 1999, "A spiral illusion via the Café Wall illusion" Perception 28 ECVP Abstract Supplement

A spiral illusion via the Café Wall illusion

A Kitaoka, T Sato

We have produced a spiral illusion using the Café Wall illusion, in which concentric circles that correspond to 'mortar lines' in the Café Wall figure appear as spirals. This finding suggests the following two observations. One is that spiral illusions are not peculiar to the Fraser illusion. The other is that the Café Wall illusion does not necessarily require linear mortar lines. We have also produced spiral illusions using several illusions resembling the Café Wall illusion as well as the Zöllner illusion. We demonstrate these illusions and discuss them in terms of analysis and integration of local features.

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