Abstract
OBSERVATION of sinusoidal spatial modulation of luminance has proved a valuable tool in the study of visual processing of luminance distributions on the retina. Information on the limits of processing capability has been gained in such diverse fields as the optics of the eye1, neurophysiology of the retina2, movement3,4 and orientation5,6 sensitivity and cortical processing of spatial frequency7,8. In the field of stereoscopic vision, Blakemore9 and Fiorentini and Maffei10 have found that when luminance gratings of slightly different spatial frequencies were presented ,to each eye, an apparently tilted grating was perceived even if one monocular grating was moving quickly relative to the other. Furthermore, tilt is perceived from gratings of the same spatial frequency but differing in contrast by 50% or more. These phenomena are not easy to explain on the basis of disparities at corresponding retinal points, but seem to require more global processing of the whole image.
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TYLER, C. Depth perception in disparity gratings. Nature 251, 140–142 (1974). https://doi.org/10.1038/251140a0
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DOI: https://doi.org/10.1038/251140a0
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