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MAY 17, 2007

BEST VISUAL ILLUSION OF THE YEAR CONTEST WINNERS BOOKMARK THIS PAGE

From the contest website:

2007 First prize 3QD ADVERTISING The Leaning Tower Illusion Frederick Kingdom, Ali Yoonessi and Elena Gheorghiu Visit our sponsors: Radical Society

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commentary, reviews, essays, Here is a novel illusion that is as striking as it is simple. The two images of the Leaning Tower dispatches, scholarship, art, of Pisa are identical, yet one has the impression that the tower on the right leans more, as if fiction and poetry. photographed from a different angle. The reason for this is because the visual system treats the two images as if part of a single scene. Normally, if two adjacent towers rise at the same angle, Read more... their image outlines converge as they recede from view due to perspective, and this is taken into Advertise on 3 Quarks Daily account by the visual system. So when confronted with two towers whose corresponding outlines are parallel, the visual system assumes they must be diverging as they rise from view, and this is what we see. The illusion is not restricted to towers photographed from below, but works well with other scenes, such as railway tracks receding into the distance. What this illusion reveals is less to do with perspective, but how the visual system tends to treat two side-

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by-side images as if part of the same scene. However hard we try to think of the two photographs of the Leaning Tower as separate, albeit identical images of the same object, our Total Audio-Visual visual system regards them as the ‘Twin Towers of Pisa’, whose perspective can only be Rental interpreted in terms of one tower leaning more than the other. Call Now--800-424-2858-- Offices in Nashville, Knoxville, Chattanooga More illusions here. www.gaultav.com

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