The colour hexagon: a chromaticity diagram based on photoreceptor excitations as a generalized representation of colour opponency

@article{Chittka2004TheCH,
  title={The colour hexagon: a chromaticity diagram based on photoreceptor excitations as a generalized representation of colour opponency},
  author={Lars Chittka},
  journal={Journal of Comparative Physiology A},
  year={2004},
  volume={170},
  pages={533-543}
}
  • L. Chittka
  • Published 1 June 1992
  • Biology
  • Journal of Comparative Physiology A
SummaryA chromaticity diagram which plots the 3 photoreceptor excitations of trichromatic colour vision systems at an angle of 120° is presented. It takes into acount the nonlinear transduction process in the receptors. The resulting diagram has the outline of an equilateral hexagon. It is demonstrated by geometrical means that excitation values for any type of spectrally opponent mechanism can be read from this diagram if the weighting factors of this mechanism add up to zero. Thus, it may… 
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