Abstract

A simple steady-state model is proposed to explain a well-known phenomenon of subjective brightness, namely that high illuminance greatly increases the apparent contrast of a scene. This effect is obtained in the model by making both the reference level and gain of the system depend on the average illumination. The numerical values of the system parameters evaluated from published data of Hurvich and Jameson are in good agreement with those derived from independent experiments of S. S. Stevens. The basic model can be improved by modifications which make it show qualitatively the stabilized retinal image effect, and edge effects such as Mach bands. The physiological plausibility of the model is discussed briefly and no implausible requirements are found.

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References

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  1. S. S. Stevens, Science 133, 80 (1961).
  2. D. Jameson and L. M. Hurvich, Science 133, 174 (1961).
  3. H. Helson, in Psychology: Study of a Science, edited by S. Koch (McGraw-Hill Book Company, Inc., New York, 1959), Vol. p. 565.
  4. Y. Le Grand, Light, Colour, and Vision (John Wiley & Sons, Inc., New York, 1957), p. 250.
  5. R. W. Ditchburn, "Eye movements in relation to perception of color," in Visual Problems of Color, Symposium, (Chemical Publishing Company, New York, 1961). Vol. 2. D. 51.
  6. Communications Biophysics Group of Research Laboratory of Electronics and William M. Siebert, "Processing neuroelectric data," MIT Tech. Rept. 351 (July 7, 1959).
  7. W. R. Lowenstein, Sci. American 203, 98 (1960).
  8. D. H. Kelly, J. Opt. Soc. Am. 51, 422 (1961).
  9. D. H. Kelly, J. Opt. Soc. Am. 51, 747 (1961).
  10. G. v. Békésy, J. Opt. Soc. Am. 50, 1060–1070 (1960).

Békésy, G. v.

G. v. Békésy, J. Opt. Soc. Am. 50, 1060–1070 (1960).

Ditchburn, R. W.

R. W. Ditchburn, "Eye movements in relation to perception of color," in Visual Problems of Color, Symposium, (Chemical Publishing Company, New York, 1961). Vol. 2. D. 51.

Grand, Y. Le

Y. Le Grand, Light, Colour, and Vision (John Wiley & Sons, Inc., New York, 1957), p. 250.

Helson, H.

H. Helson, in Psychology: Study of a Science, edited by S. Koch (McGraw-Hill Book Company, Inc., New York, 1959), Vol. p. 565.

Hurvich, L. M.

D. Jameson and L. M. Hurvich, Science 133, 174 (1961).

Jameson, D.

D. Jameson and L. M. Hurvich, Science 133, 174 (1961).

Kelly, D. H.

D. H. Kelly, J. Opt. Soc. Am. 51, 422 (1961).

D. H. Kelly, J. Opt. Soc. Am. 51, 747 (1961).

Lowenstein, W. R.

W. R. Lowenstein, Sci. American 203, 98 (1960).

Stevens, S. S.

S. S. Stevens, Science 133, 80 (1961).

Other (10)

S. S. Stevens, Science 133, 80 (1961).

D. Jameson and L. M. Hurvich, Science 133, 174 (1961).

H. Helson, in Psychology: Study of a Science, edited by S. Koch (McGraw-Hill Book Company, Inc., New York, 1959), Vol. p. 565.

Y. Le Grand, Light, Colour, and Vision (John Wiley & Sons, Inc., New York, 1957), p. 250.

R. W. Ditchburn, "Eye movements in relation to perception of color," in Visual Problems of Color, Symposium, (Chemical Publishing Company, New York, 1961). Vol. 2. D. 51.

Communications Biophysics Group of Research Laboratory of Electronics and William M. Siebert, "Processing neuroelectric data," MIT Tech. Rept. 351 (July 7, 1959).

W. R. Lowenstein, Sci. American 203, 98 (1960).

D. H. Kelly, J. Opt. Soc. Am. 51, 422 (1961).

D. H. Kelly, J. Opt. Soc. Am. 51, 747 (1961).

G. v. Békésy, J. Opt. Soc. Am. 50, 1060–1070 (1960).

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