NATS 1870 Chapter Notes - Chapter 16: Trichromacy, Spectral Sensitivity, Subtractive Color
21 Sep 2017
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Physiology of the human colour vision system iv. Physiology of the human colour vision system iv: Opponent-colour channels: red-green, blue- yellow; and black-white. Colour-opponent cells (or, why subtracting is better than adding) Colours can also be produced through mixing of other colours. Explains how mixed colours of light produce resultant colours. Mixing of light happens in the brain. Mixing is additive, the more lights are mixed together, the brighter the resultant colour. Explains how mixed surface colours produce resultant colours. Mixing of colours happens on the physical surface. Mixing is subtractive: the more colours are mixed together, the darker the resultant colour. There is a slight di erence between the actual wavelengths of max sensitivities of the cones and the r, g, b colours chosen to represent the additive primaries. Note: the curve on the right joins" both peaks since they are in adjacent" cones (and will have a common range of shared wavelengths of sensitivity).
