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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 2, Iss. 11 — Nov. 26, 2007

Perceived shifts in saturation and hue of chromatic stimuli in the near peripheral retina

Declan J. McKeefry, Ian J. Murray, and Neil R.A. Parry  »View Author Affiliations


JOSA A, Vol. 24, Issue 10, pp. 3168-3179 (2007)
http://dx.doi.org/10.1364/JOSAA.24.003168


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Abstract

Using an asymmetric color matching technique, we measured the perceived changes that occur in the saturation and hue of colored stimuli at different eccentricities within the central 25° of the human retina in nine color-normal subjects. A cone-opponent-based vector model was used to compute the activity of the L M and S ( L + M ) channels. The results show that a large proportion of the shifts in saturation and hue that occur with increasing retinal eccentricity are mirrored by decreased activity of the L M channel. In comparison, the contribution of the S cone-opponent system undergoes relatively little change within the central 20°. In addition, we also found that changes in saturation and hue are different from each other in terms of their variation across color space and their variation with stimulus size. Our findings suggest that perceived shifts in saturation and hue are mediated largely via the reduction in activation of the L M cone-opponent channel but that saturation and hue might be subject to different retinal and/or cortical influences that contribute to their differing size dependencies in the peripheral retina.

© 2007 Optical Society of America

OCIS Codes
(330.0330) Vision, color, and visual optics : Vision, color, and visual optics

ToC Category:
Vision, Color, and Visual Optics

History
Original Manuscript: January 2, 2007
Revised Manuscript: April 16, 2007
Manuscript Accepted: June 7, 2007
Published: September 14, 2007

Virtual Issues
Vol. 2, Iss. 11 Virtual Journal for Biomedical Optics

Citation
Declan J. McKeefry, Ian J. Murray, and Neil R. A. Parry, "Perceived shifts in saturation and hue of chromatic stimuli in the near peripheral retina," J. Opt. Soc. Am. A 24, 3168-3179 (2007)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=josaa-24-10-3168

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