Persistence of Vision
August 22, 2013 1:40 PM Subscribe
posted by phaedon (33 comments total)
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Ever do a photo shoot with hundreds or thousands of similar images, only to find yourself scrolling through Lightroom really fast, rating the best shots and/or deleting the worst ones? Here's an optical illusion that makes the case for why you might want to slow down. (via)
The phenomenon occuring is described as "Persistence of Vision,"
whereby an "afterimage" is thought to persist in retina for approximately one twenty-fifth of a second, and in this case, invoking a distortion that sets in almost immediately. Scientists refer to this as the phi phenomenon
or beta movement,
whereby fixed objects create the illusion of motion; an illusion that of course makes motion pictures watchable, and that appears in everyday items like LED scrolling banners.