Hostname: page-component-78c5997874-t5tsf Total loading time: 0 Render date: 2024-11-14T05:21:47.518Z Has data issue: false hasContentIssue false
  • English
  • Français

Chromatic and contrast selectivity in color contrast adaptation

Published online by Cambridge University Press:  05 April 2005

YOKO MIZOKAMI ,
CARRIE PARAS  and
MICHAEL A. WEBSTER
YOKO MIZOKAMI
Affiliation:
Department of Psychology, University of Nevada, Reno
CARRIE PARAS
Affiliation:
Department of Psychology, University of Nevada, Reno
MICHAEL A. WEBSTER
Affiliation:
Department of Psychology, University of Nevada, Reno
Get access Rights & Permissions [Opens in a new window]

Abstract

We used color contrast adaptation to examine the chromatic and contrast selectivity of central color mechanisms. Adaptation to a field whose color varies along a single axis of color space induces a selective loss in sensitivity to the adapting axis. The resulting changes in color appearance are consistent with mechanisms formed by different linear combinations of the cone signals. We asked whether the visual system could also adjust to higher-order variations in the adapting stimulus, by adapting observers to interleaved variations along both the L versus M and the S versus LM cardinal axes. The perceived hue of test stimuli was then measured with an asymmetric matching task. Frequency analysis of the hue shifts revealed weak but systematic hue rotations away from each cardinal axis and toward the diagonal intermediate axes. Such shifts could arise if the adapted channels include mechanisms with narrow chromatic selectivity, as some physiological recordings suggest, but could also reflect how adaptation alters the contrast response function. In either case they imply the presence of more than two mechanisms within the chromatic plane. In a second set of measurements, we adapted to either the L versus M or the S versus LM axis alone and tested whether the changes in hue could be accounted for by changes in relative contrast along the two axes. For high contrasts the hue biases are larger than the contrast changes predict. This dissociation implies that the contrast and hue changes are not carried by a common underlying signal, and could arise if the contrast along a single color direction is encoded by more than one mechanism with different contrast sensitivities or if different subsets of channels encode contrast and hue. Such variations in contrast sensitivity are also consistent with physiological recordings of cortical neurons.

Keywords

Contrast adaptationChromatic channels
Type
Research Article
Information
Visual Neuroscience , Volume 21 , Issue 3 , May 2004 , pp. 359 - 363
Copyright
© 2004 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Albrecht, D.G. & Hamilton, D.B. (1982). Striate cortex of monkey and cat: Contrast response function. Journal of Neurophysiology 48, 217–237.Google Scholar
Atick, J.J., Li, Z., & Redlich, A.N. (1993). What does post-adaptation color appearance reveal about cortical color representation? Vision Research 33, 123–129.Google Scholar
Clifford, C.W.G., Spehar, B., Solomon, S.G., Martin, P.R., & Zaidi, Q. (2003). Interactions between color and luminance in the perception of orientation. Journal of Vision 3, 106–115.Google Scholar
DeValois, R.L., DeValois, K.K., & Mahon, L.E. (2000a). Contribution of S opponent cells to color appearance. Proceedings of the National Academy of Sciences of the U.S.A. 97, 512–517.Google Scholar
DeValois, R.L., Cottaris, N.P., Elfar, S.D., Mahon, L.E., & Wilson, J.A. (2000b). Some transformations of color information from lateral geniculate nucleus to striate cortex. Proceedings of the National Academy of Sciences of the U.S.A. 97, 4997–5002.Google Scholar
Gegenfurtner, K.R. (2003). Cortical mechanisms of colour vision. Nature Reviews Neuroscience 4, 563–572.Google Scholar
Goda, N. & Fujii, M. (2001). Sensitivity to modulation of color distribution in multicolored textures. Vision Research 41, 2475–2485.Google Scholar
Kiper, D.C., Levitt, J.B., & Gegenfurtner, K.R. (1999). Chromatic signals in extrastriate areas V2 and V3. In Color Vision: From Genes to Perception, ed. Gegenfurtner, K.R. & Sharpe, L.T., pp. 249–268. Cambridge, UK: Cambridge University Press.
Krauskopf, J., Williams, D.R., & Heeley, D.W. (1982). Cardinal directions of color space. Vision Research 22, 1123–1131.Google Scholar
Krauskopf, J., Williams, D.R., Mander, M.B., & Brown, A.M. (1986). Higher order color mechanisms. Vision Research 26, 23–32.Google Scholar
Lennie, P. (1999). Color coding in the cortex. In Color Vision: From Genes to Perception, ed. Gegenfurtner, K.R. & Sharpe, L.T., pp. 235–247. Cambridge, UK: Cambridge University Press.
Webster, M.A. (1996). Human colour perception and its adaptation. Network: Computation in Neural Systems 7, 587–634.Google Scholar
Webster, M.A. & Mollon, J.D. (1994). The influence of contrast adaptation on color appearance. Vision Research 34, 1993–2020.Google Scholar
Webster, M.A. & Wilson, J.A. (2000). Interactions between chromatic adaptation and contrast adaptation in color appearance. Vision Research 40, 3801–3816.Google Scholar
Zaidi, Q. & Shapiro, A.G. (1993). Adaptive orthogonalization of opponent-color signals. Biological Cybernetics 69, 415–428.Google Scholar