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> No, cones do not produce a negative response. Yes, they do, after the photoreceptors. Those CIE colorspace curves aren't biology, and shouldn't be interprete
by nomel 1y ago
> No, cones do not produce a negative response.
Yes, they do, after the photoreceptors. Those CIE colorspace curves aren't biology, and shouldn't be interpreted as such.
LMS colorspace is the (currently understood) biological colorspace [1], and contains inhibitions, from the opponent process [2] found in the meatware [3]:
red-green: L - M
blue-yellow: S - (L + M)
This contains a nice introduction to biological colorspace [4].
[1] https://en.wikipedia.org/wiki/LMS_color_space https://en.wikipedia.org/wiki/LMS_color_space
[2] https://en.wikipedia.org/wiki/Opponent_process https://en.wikipedia.org/wiki/Opponent_process
[3] https://en.wikipedia.org/wiki/Lateral_geniculate_nucleus#Color_processing https://en.wikipedia.org/wiki/Lateral_geniculate_nucleus#Col...
[4] https://color2.psych.upenn.edu/brainard/papers/Stockman_Brainard_ColorVision.pdf https://color2.psych.upenn.edu/brainard/papers/Stockman_Brai...
- ekunazanu 1y agoOh I was referring to the response of the cones itself (not the response after the opponent process). I was under the assumption there's no measured curves for the responses after having gone through the opponent process in the neuron-layer(?), so the graph and caption were conflating the response of the cones with color matching functions. > This contains a nice introduction to biological colorspace Looks like an interesting read, thanks for sharing!