It comes from the operation of attentional and perceptual processes interacting with a visual array changing at minimum frame rate.

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Perhaps an answer can be found in the enduring power of his photographs, which always frame the changing world before his eyes.

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"I think changing a picture's frame is an ownership thing, a territorial way to put your mark on a painting, " says Eli Wilner, a New York dealer widely credited with raising the American frame market's consciousness (not to mention prices).

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