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Psychophysical and physiological responses to gratings with luminance and chromatic components of different spatial frequencies |
JOSA A, Vol. 29, Issue 2, pp. A314-A323 (2012)
http://dx.doi.org/10.1364/JOSAA.29.00A314
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Abstract
Gratings that contain luminance and chromatic components of different spatial frequencies were used to study the segregation of signals in luminance and chromatic pathways. Psychophysical detection and discrimination thresholds to these compound gratings, with luminance and chromatic components of the one either half or double the spatial frequency of the other, were measured in human observers. Spatial frequency tuning curves for detection of compound gratings followed the envelope of those for luminance and chromatic gratings. Different grating types were discriminable at detection threshold. Fourier analysis of physiological responses of macaque retinal ganglion cells to compound waveforms showed chromatic information to be restricted to the parvocellular pathway and luminance information to the magnocellular pathway. Taken together, the human psychophysical and macaque physiological data support the strict segregation of luminance and chromatic information in independent channels, with the magnocellular and parvocellular pathways, respectively, serving as likely the physiological substrates.
© 2012 Optical Society of America
OCIS Codes
(330.1720) Vision, color, and visual optics : Color vision
(330.1800) Vision, color, and visual optics : Vision - contrast sensitivity
(330.1880) Vision, color, and visual optics : Detection
(330.5380) Vision, color, and visual optics : Physiology
(330.5510) Vision, color, and visual optics : Psychophysics
ToC Category:
Retinal and cortical color processing
History
Original Manuscript: September 12, 2011
Revised Manuscript: December 7, 2011
Manuscript Accepted: December 8, 2011
Published: February 1, 2012
Virtual Issues
Vol. 7, Iss. 4 Virtual Journal for Biomedical Optics
Citation
Bonnie Cooper, Hao Sun, and Barry B. Lee, "Psychophysical and physiological responses to gratings with luminance and chromatic components of different spatial frequencies," J. Opt. Soc. Am. A 29, A314-A323 (2012)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-29-2-A314
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