Which is more important for face recognition: outline or tonal shapes?
Jim Carrey (left) and Kevin Costner.
According to vision scientists Pawan Sinha et al, "Images which contain exclusively contour information are very difficult to recognize, suggesting that high-spatial frequency information, by itself, is not an adequate cue for human face recognition processes."
By contrast, the tonal shapes, even if they're out of focus, are relatively easy to recognize. The experts say: "Unlike current machine-based systems, human observers are able to handle significant degradations in face images." Shown here are Michael Jordan, Woody Allen, Elvis Presley, and Jay Leno.
That's why it's good to blur your eyes when you're capturing a likeness.
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Source: Face Recognition by Humans: Nineteen Results All Computer Vision Researchers Should Know About, Pawan Sinha, Benjamin Balas, Yuri Ostrovsky, and Richard Russell,
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