[1stPickSites] (11/19/04) Optical Illusions & Visual Phenomena

Optical Illusions & Visual Phenomena

http://www.michaelbach.de/ot/index.html

Today's site by Michael Bach offers some amazing visuals which
illustrate a
vast array of optical illusions. Readers will discover many
surprising elements in this fascinating visual presentation. 

"These pages demonstrate some visual phenomena, generally called
optical illusions, less often visual illusions - the latter more
appropriate IMHO.  I'm stressing here relative novelty and
interactivity. Whenever I find the time, I will expand the
explanations, to the degree that these phenomena are really
understood. ... I view these phenomena as bringing out particular
good adaptations to standard viewing situations. These
adaptations are "hard-wired" into our brains, thus under some
artificial manipulations they cause inappropriate interpretations
of the visual scene.... Note: most of the demonstrations require
the free players for Apple's Quicktime (4 or higher) and
Macromedia's Flash (6 or higher), both available for several
platforms." - from the website

The site features visual illusions under various categories such
as Motion and Time, Luminance and Contrast, Colour, Geometric and
Angle Illusions, Size Constancy and Cognitive / Gestalt Effects.
Despite the technical language used for the titles of each
"illusion", the spell-binding examples are riveting. Excellent,
lucid explanations are provided for each example.

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