The following points are examined: (a) the problem of how to define the colour of a stimulus used in visual research; (b) the limited relation of the colour-matching functions to the spectral sensitivity curves of the individual colour receptors in the retina; and (c) the case for abandoning luminance as a colorimetric variable and lightness as a colour appearance variable.
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References
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GuildJ, 1931“The colorimetric properties of the spectrum”Philosophical Transactions of the Royal Society of London, Series A230149–187
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StilesW S, 1949“Increment thresholds and the mechanisms of colour vision”Documenta Ophthalmologica3138–163
