Ellipses on the surface of a picture.
Shapes on the surface of a perspective picture may be misperceived. Subjects picked a match for an ellipse depicting the circular top of a cylinder. The top was depicted as tilted forward from 5 degrees to 85 degrees, generating a series of ellipses on the picture surface. The matches were biased towards a circle over a wide range of midrange tilts, which suggests that, influenced by features of perspective, they were seen as in-between the shape on the surface and the shape they depicted.
University of Toronto at Scarborough, ON, Canada.
Sherief
S
Hammad
John M
JM
Kennedy
Igor
I
Juricevic
Shazma
S
Rajani
D000293:Adolescent; D000328:Adult; D005260:Female; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D008297:Male; D009903:Optical Illusions; D009949:Orientation; D011601:Psychophysics; D015348:Vision, Binocular / Q000502:physiology