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S-cone discrimination for stimuli with spatial and temporal chromatic contrast

Published online by Cambridge University Press:  03 July 2008

DINGCAI CAO
Affiliation:
Visual Science Laboratories, Department of Ophthalmology and Visual Science, The University of Chicago, Chicago, Illinois
ANDREW J. ZELE
Affiliation:
School of Optometry and the Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia
VIVIANNE C. SMITH
Affiliation:
Visual Science Laboratories, Department of Ophthalmology and Visual Science, The University of Chicago, Chicago, Illinois
JOEL POKORNY*
Affiliation:
Visual Science Laboratories, Department of Ophthalmology and Visual Science, The University of Chicago, Chicago, Illinois
*
Address correspondence and reprint requests to: Joel Pokorny, Visual Science Laboratories, The University of Chicago, 940 East 57th Street, Chicago, IL 60637. E-mail: j-pokorny@uchicago.edu

Abstract

In the natural environment, color discriminations are made within a rich context of spatial and temporal variation. In classical laboratory methods for studying chromatic discrimination, there is typically a border between the test and adapting fields that introduces a spatial chromatic contrast signal. Typically, the roles of spatial and temporal contrast on chromatic discrimination are not assessed in the laboratory approach. In this study, S-cone discrimination was measured using stimulus paradigms that controlled the level of spatio-temporal S-cone contrast between the tests and adapting fields. The results indicate that S-cone discrimination of chromaticity differences between a pedestal and adapting surround is equivalent for stimuli containing spatial, temporal or spatial-and-temporal chromatic contrast between the test field and the surround. For a stimulus condition that did not contain spatial or temporal contrast, the visual system adapted to the pedestal instead of the surround. The data are interpreted in terms of a model consistent with primate koniocellular pathway physiology. The paradigms provide an approach for studying the effects of spatial and temporal contrast on discrimination in natural scenes.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2008

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References

REFERENCES

Boynton, R.M. & Kambe, N. (1980). Chromatic difference steps of moderate size measured along theoretically critical axes. Color Research and Application 5, 1323.Google Scholar
Dacey, D.M. (1996). Circuitry for color coding in the primate retina. [Review]. Proceedings of the National Academy of Sciences USA 93, 582588.CrossRefGoogle ScholarPubMed
Kaplan, E. (2004). The M, P, and K Pathways of the Primate Visual System. In The Visual Neuroscience, ed. Chalupa, L.M. & Werner, J.S., pp. 481493. Cambridge, MA: MIT Press.Google Scholar
Krauskopf, J. & Gegenfurtner, K. (1992). Color discrimination and adaptation. Vision Research 32, 21652175.CrossRefGoogle ScholarPubMed
Lee, B.B. (1996). Receptive field structure in the primate retina. Vision Research 36, 631644.CrossRefGoogle ScholarPubMed
Le Grand, Y. (1949). Les seuils différentiels de couleurs dans la théorie de Young (English translation by K. Knoblauch, “Color difference thresholds in Young's theory.” Color Research and Application 19, 296–309, 1994). Revue d'Optique 28, 261278.Google Scholar
Le Grand, Y. (1968). Light, Colour and Vision. Second Edition. pp. 1564. London: Chapman and Hall.Google Scholar
MacLeod, D.I.A. & Boynton, R.M. (1979). Chromaticity diagram showing cone excitation by stimuli of equal luminance. Journal of the Optical Society of America A 69, 11831185.Google Scholar
Miyahara, E. (1993). Spectral Sensitivity Functions of X-Chromosome-Linked Color Defective Observers. Ph.D. Dissertation. Chicago: University of Chicago.Google Scholar
Miyahara, E., Pokorny, J. & Smith, V.C. (1996). Increment threshold and purity discrimination spectral sensitivities of X-chromosome-linked color defective observers. Vision Research 36, 15971613.CrossRefGoogle ScholarPubMed
Miyahara, E., Smith, V.C. & Pokorny, J. (1993). How surrounds affect chromaticity discrimination. Journal of the Optical Society of America A 10, 545553.Google Scholar
Pokorny, J. & Smith, V.C. (2004). Chromatic discrimination. In The Visual Neuroscience, ed. Chalupa, L.M. & Werner, J.S., pp. 908923. Cambridge, MA: MIT Press.Google Scholar
Pugh, E.N.J. & Mollon, J.D. (1979). A theory of the π-1 and π-3 color mechanisms of Stiles. Vision Research 19, 293312.CrossRefGoogle Scholar
Shapiro, A. & Zaidi, Q. (1992). The effects of prolonged temporal modulation on the differential response of color mechanisms. Vision Research 32, 20652075.CrossRefGoogle ScholarPubMed
Shapiro, A.G., Beere, J.L. & Zaidi, Q. (2003). Time-course of S-cone system adaptation to simple and complex fields. Vision Research 43, 11351147.CrossRefGoogle ScholarPubMed
Smith, V.C., Lee, B.B., Pokorny, J., Martin, P.R. & Valberg, A. (1992). Responses of macaque ganglion cells to the relative phase of heterochromatically modulated lights. Journal of Physiology (London) 458, 191221.Google Scholar
Smith, V.C. & Pokorny, J. (1975). Spectral sensitivity of the foveal cone photopigments between 400 and 500 nm. Vision Research 15, 161171.CrossRefGoogle Scholar
Smith, V.C. & Pokorny, J. (1996). The design and use of a cone chromaticity space. Color Research and Application 21, 375383.Google Scholar
Smith, V.C., Pokorny, J. & Sun, H. (2000). Chromatic contrast discrimination: Data and prediction for stimuli varying in L and M cone excitation. Color Research and Application 25, 105115.3.0.CO;2-G>CrossRefGoogle Scholar
Stiles, W.S. (1949). Increment thresholds and the mechanisms of colour vision. Documenta Ophthalmologica 3, 138163.CrossRefGoogle ScholarPubMed
Stiles, W.S. (1972). The line element in colour theory: A historical review. In Color Metrics, ed. Vos, J.J., Friele, L.F.C. & Walraven, P.L., pp. 125. Soesterberg: AIC/Holland.Google Scholar
Stiles, W.S. (1978). Mechanisms of Colour Vision. London: Academic Press.Google Scholar
Vos, J.J. (1978). Colorimetric and photometric properties of a 2° fundamental observer. Color Research and Application 3, 125128.CrossRefGoogle Scholar
Wald, G. (1964). The receptors of human color vision. Science 145, 1007.Google Scholar
Yeh, T., Lee, B.B. & Kremers, J. (1995). The temporal response of ganglion cells of the macaque retina to cone-specific modulation. Journal of the Optical Society of America A 12, 456464.Google Scholar
Yeh, T., Pokorny, J. & Smith, V.C. (1993). Chromatic discrimination with variation in chromaticity and luminance: Data and Theory. Vision Research 33, 18351845.CrossRefGoogle ScholarPubMed
Zaidi, Q., Shapiro, A. & Hood, D. (1992). The effect of adaptation on the differential sensitivity of the S-cone color system. Vision Research 32, 12971318.CrossRefGoogle ScholarPubMed
Zele, A.J., Smith, V.C. & Pokorny, J. (2006). Spatial and temporal chromatic contrast: Effect on chromatic contrast discrimination for stimuli varying in L- and M-cone excitation. Visual Neuroscience 23, 495501.CrossRefGoogle Scholar
Zele, A.J. & Vingrys, A.J. (2005). Cathode-ray-tube monitor artefacts in neurophysiology. Journal of Neuroscience Methods 141, 17.Google Scholar