Fast perceptual learning in visual hyperacuity.

@article{Poggio1991FastPL,
  title={Fast perceptual learning in visual hyperacuity.},
  author={Tomaso A. Poggio and Manfred Fahle and Shimon Edelman},
  journal={Science},
  year={1991},
  volume={256 5059},
  pages={
          1018-21
        }
}
In many different spatial discrimination tasks, such as in determining the sign of the offset in a vernier stimulus, the human visual system exhibits hyperacuity by evaluating spatial relations with the precision of a fraction of a photoreceptor's diameter. It is proposed that this impressive performance depends in part on a fast learning process that uses relatively few examples and that occurs at an early processing stage in the visual pathway. This hypothesis is given support by the… 

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...

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