Do channels shift their tuning towards lower spatial frequencies in the periphery?

Vision Research
M A García-Pérez, V Sierra-Vázquez

Abstract

Space-variant multichannel spatial vision models include either anchored channels whose units (sensors) share their tuning frequency, or shifting channels whose sensors shift their tuning towards lower frequencies in the periphery. Each type of model embodies a different type of structural organization across eccentricity. Anchored- and shifting-channel models are tested in this paper against empirical data from five types of relevant detection experiment: measurements of the local sine-wave contrast sensitivity function (CSF) at several eccentricities using (a) fixed apertures, (b) apertures scaled with eccentricity or (c) fixed number of cycles, (d) measurements of foveal sensitivity as a function of aperture size, and (e) measurements of the contrast sensitivity gradient across the visual field. Each type of model is shown to predict a different outcome in each type of experiment. A review of empirical research reveals that three of the five experiment types have yielded two distinct sets of results, each of which is consistent with the predictions from one of the types of model, while the two other types of experiment have always yielded similar results which support anchored-channel models. Further scrutiny of the models r...Continue Reading

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Citations

Oct 12, 2000·The Journal of Comparative Neurology·H Op De Beeck, R Vogels
Jul 8, 2011·Attention, Perception & Psychophysics·Miguel A García-Pérez, Rocío Alcalá-Quintana
Sep 25, 1998·Vision Research·M A García-Pérez, V Sierra-Vázquez
Nov 3, 2006·Vision Research·John M FoleyMylene C Q Farias
Oct 31, 2006·Vision Research·Casimir J H LudwigBrent R Beutter
Nov 4, 2000·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·L IttiJ Braun
Jun 1, 1997·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·L F Scharff

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