Elsevier

Vision Research

Volume 11, Issue 3, March 1971, Pages 251-259, IN4
Vision Research

Detection of grating patterns containing two spatial frequencies: A comparison of single-channel and multiple-channels models

https://doi.org/10.1016/0042-6989(71)90189-1Get rights and content

Abstract

Contrast thresholds were measured for gratings containing two superimposed sinusoidal components. The frequency of one component was always three times that of the other, but the phase between components and the ratio of their contrasts took on several values. Two models of pattern vision were tested

  • (1)

    a single-channel model in which pattern vision is a function of a single neural network and

  • (2)

    a multiple-channels model in which the stimulus information is processed by many channels, each sensitive to a narrow range of spatial frequencies. Results support the multiple-channels and reject the single-channel model.

Résumé

On mesure les seuils de contraste avec des réseaux contenant deux composantes sinusoïdales superposées. La fréquence d'une composante est toujours triple de l'autre, mais la phase entre les composantes et leurs rapports d'amplitudes peutent prendre diverses valeurs. On teste deux modèles de vision des formes:

  • (1)

    un modèleàcanal unique oùcette vision n'est fonction que d'un seul réseau nerveux, et

  • (2)

    (2) un modèleàcanaux multiples oùl'information sur le stimulus est transmise par plusieurs canaux, chacunétant sensible dans un domaineétroit de fréquences spatiales. Les résultats sont en faveur des canaux multiples et condamnent le modèleàcanal unique.

Zusammenfassung

Es wurden Kontrastschwellen für Gitter gemessen, welche zwei einanderübergesetzte Sinuskomponenten enthielten. Die Frequenz einer der Komponenten war immer dreimal so gross als die andere, aber ihr Phasenunterschied und das Kontrastverhältnis nahmen verschieden Werte an. Es wurden zwei Modelle des Mustersehens geprüft:

  • (1)

    ein Einbahn-modell, in welchem das Mustersehen eine Funktion eines einzigen Nervennetzwerkes ist und

  • (2)

    ein Vielbahnmodell, in welchem die Reizinformation auf mehreren Wegen verarbeitet wird, deren jeder auf einen engen Raumfrequenzbereich empfindlich ist. Die Ergebnisse stützen das Vielbahnmodell und widersetzen sich der Einbahnidee.

Peзюme

Bыли измepeны кoнтpacтныe пopoги для peшeтки, coдepзa шeй двa нaлaгaюшихcя cинycoидaльных кoмпoнeнтa. Хacтoтa oaнoгo кoмпoнeнтa вceгдa oтлиХaлacь oт Хacтoты дpyгoгo в тpи paзa, нo фaзы мeздy кoмтюнeнтaми и cooтнoшeннe их кoнтpacтoв имeли нecкoлькo знaХeний. здecь были нcпытaны двe мoдeли пaттepнoв зpeния:

  • (1)

    oднoкaнaльнaя мoдeль, в кoтopoй пaттepн зpeния являeтcя фyнкциeй eдинoй нepвнoй ceти, и

  • (2)

    (2) мнoгoкaнaльнaя мoдeль, в кoтopoй инфopмaция o cтимyлe пepeдaeтcя мнoгими кaнaлaми, из кoтopых кaздый Хyвcтвитeлeн к yзкoмy диaлaзoнy пpocтopaнcтвeн ных Хacтoт. ПoлyХeнныe peзyльтaты пoддepзивaют мyльтикaнaльнyю мoдeль и пoзвoляют oтбpocить oднoкaнaльнyю.

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This work was supported by Grant EY-00302 from the National Eye Institute, National Institutes of Health. The first author was supported by an NSF Graduate Traineeship. Her present address is Rockefeller University, New York N.Y. 10021 U.S.A.

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