Localized effects of spatial frequency adaptation.
The spatially localized threshold-elevation aftereffect of spatial-frequency adaptation was measured by using localized, aperiodic test patterns that have bandpass Fourier transforms. At a given retinal location, the threshold-elevation curves are consistent with the fatigue of size-turned mechanisms with center-surround sensitivity profile. Only a few different sizes of such mechanisms were required to fit the local results. The local aftereffect was also measured as a function of eccentricity near the fovea. The results indicate that the threshold-elevation aftereffect of spatial-frequency adaptation is not spatially homogeneous.
D000221:Adaptation, Ocular; D003201:Computers; D004056:Differential Threshold; D006801:Humans; D013028:Space Perception / Q000502:physiology*; D014787:Vision Tests / Q000295:instrumentation / Q000379:methods*