Perceived spatial frequency of sinusoidal gratings.

  title={Perceived spatial frequency of sinusoidal gratings.},
  author={Marco Zeppieri and Shaban Demirel and Kyle J Kent and Chris A. Johnson},
  journal={Optometry and vision science : official publication of the American Academy of Optometry},
  volume={85 5},
PURPOSE The "frequency-doubling" effect or illusion, in which the apparent spatial frequency of a grating appears to be doubled, is produced when a low spatial frequency sinusoidal grating is counterphase flickered at a high temporal frequency. This study examines changes in apparent spatial frequency of sinusoids of various spatiotemporal content after equating them for detectability. METHODS Detection contrast thresholds were determined for various spatiotemporal gratings. The perceived… CONTINUE READING

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