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Impossible Figure

A class of Illusion in which an object which is physically unrealizable is apparently depicted.

See also Freemish Crate, Home Plate, Illusion, Necker Cube, Penrose Stairway, Tribar


Cowan, T. M. ``The Theory of Braids and the Analysis of Impossible Figures.'' J. Math. Psych. 11, 190-212, 1974.

Cowan, T. M. ``Supplementary Report: Braids, Side Segments, and Impossible Figures.'' J. Math. Psych. 16, 254-260, 1977.

Cowan, T. M. ``Organizing the Properties of Impossible Figures.'' Perception 6, 41-56, 1977.

Cowan, T. M. and Pringle, R. ``An Investigation of the Cues Responsible for Figure Impossibility.'' J. Exper. Psych. Human Perception Performance 4, 112-120, 1978.

Ernst, B. Adventures with Impossible Figures. Stradbroke, England: Tarquin, 1987.

Harris, W. F. ``Perceptual Singularities in Impossible Pictures Represent Screw Dislocations.'' South African J. Sci. 69, 10-13, 1973.

Fineman, M. The Nature of Visual Illusion. New York: Dover, pp. 119-122, 1996.

Jablan, S. ``Impossible Figures.'' and ``Are Impossible Figures Possible?''

Kulpa, Z. ``Are Impossible Figures Possible?'' Signal Processing 5, 201-220, 1983.

Kulpa, Z. ``Putting Order in the Impossible.'' Perception 16, 201-214, 1987.

Sugihara, K. ``Classification of Impossible Objects.'' Perception 11, 65-74, 1982.

Terouanne, E. ``Impossible Figures and Interpretations of Polyhedral Figures.'' J. Math. Psych. 27, 370-405, 1983.

Terouanne, E. ``On a Class of `Impossible' Figures: A New Language for a New Analysis.'' J. Math. Psych. 22, 24-47, 1983.

Thro, E. B. ``Distinguishing Two Classes of Impossible Objects.'' Perception 12, 733-751, 1983.

Wilson, R. ``Stamp Corner: Impossible Figures.'' Math. Intell. 13, 80, 1991.

© 1996-9 Eric W. Weisstein