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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 54, Iss. 12 — Dec. 1, 1964
  • pp: 1467–1469

Variables of Perceived Color

RALPH M. EVANS  »View Author Affiliations


JOSA, Vol. 54, Issue 12, pp. 1467-1469 (1964)
http://dx.doi.org/10.1364/JOSA.54.001467


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Abstract

<p>The variables of perceived color are reconsidered critically. Two ways of viewing color are distinguished as modes of <i>perception</i>: (1) perceiving the effect of light entering the eye, as such, and (2) perceiving the effect produced by an object on the perceived color of light. For the light mode of perception, there are <i>at least four</i> and possibly six or more <i>independent</i> perceptual variables for the general case. For the object mode this number is reduced by at least one. Both modes can be reduced to three perceptual variables by simple restrictions but, in general, the three to which they reduce are not the same.</p><p>Four perceptual variables are necessary (and perhaps sufficient) to describe the color perceptions produced by light sources, illumination, and both reflecting and transmitting objects. They each produce part or all of the perceptions of the four-dimensional color-perception continuum produced by a single homogeneous aperture color with a homogeneous surround.</p>

Citation
RALPH M. EVANS, "Variables of Perceived Color," J. Opt. Soc. Am. 54, 1467-1469 (1964)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-54-12-1467


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References

  1. As set forth in their 1952 report, published as The Science of Color The Thomas Y. Crowell Company, New York, 1953 and 1963).
  2. The article as a whole, so far as is possible, is also written in OSA terminology.
  3. R. M. Evans, J. Opt. Soc. Am. 49, 1049 (1959). This phenomenon has been investigated and perhaps discovered by the writer. It is described in some detail in this reference. Briefly, it was found that the appearance of fluorescence did not require the presence of true physical fluorescence, hence the perception of apparent fluorescence was given the name "fluorence." It is apparent that no fluorescence is involved in the present case so the word is again used here.

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