Field additivity of Stiles's Pi-4 color mechanism.

@article{Reeves1987FieldAO,
  title={Field additivity of Stiles's Pi-4 color mechanism.},
  author={Adam J. Reeves},
  journal={Journal of the Optical Society of America. A, Optics and image science},
  year={1987},
  volume={4 3},
  pages={
          525-9
        }
}
  • A. Reeves
  • Published 1 March 1987
  • Physics, Medicine
  • Journal of the Optical Society of America. A, Optics and image science
Stiles's middle-wave color mechanism Pi-4 is field additive for mixtures of 410-, 480-, 530-, 622-, and 670-nm adaptation fields, when studied with a 1-deg, 200-msec, 500-nm foveal test flash at 10 times absolute threshold. 
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Effects of chromatic adaptation on opponent interactions in monkey increment-threshold spectral-sensitivity functions.
TLDR
Most of the changes in the shape of ITSS functions under chromatic adaptation are explained by the von Kries adaptation principle.

References

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TLDR
The results cannot reject the hypothesis that the first log unit of adaptation observed under II5-isolation conditions is determined exclusively by the quantum catch rate of the long-wavelength-sensitive cones.
Pi-4: adaptation of more than one class of cone.
TLDR
The Pi-4 color mechanism was isolated in three observers with a 500-nm, 200-msec, l-deg foveal test flash and it is concluded that thePi-4 branch represents light adaptation controlled by more than one class of cone.
Exchange thresholds for long-wavelength incremental flashes.
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    Journal of the Optical Society of America
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TLDR
Results can be accounted for if the 641-nm tests are detected not through pathways controlled by long-wavelength cones alone but through nonopponent (20-msc) and opponent (200-msec) pathways whose sensitivities may be reduced by transient inputs from other cones.
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TLDR
A model is developed to explain this surprising phenomenon where the cone spectral sensitivities of normals are seen to be the same as those of dichromats, although there is some individual variation.
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  • Biology
    Journal of the Optical Society of America
  • 1983
TLDR
The summation-index technique was applied to flicker photometry to investigate the linearity law, and the subsummation was interpreted as cancellation of red and green responses in the red-versus-green opponent channel.
Opponent chromatic response functions for an average observer
TLDR
Average opponent chromatic response functions are presented for use in quantitative models of color perception and are used to describe a theoretical huenaming curve for an average observer.
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