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ak-47

When we say "same (S,M,L) response" are we normalizing that 3-tuple? E.g. are spectra integrating to (1,1,1) and (2,2,2) metamers?

whdawn

I guess the color of (1,1,1) and (2,2,2) is the same, but they have differences in brightness or other aspects

kayvonf

@ak-47. Actually no. They would project to the same chromaticity in the intensity normalized 2D chromaticity diagram, but they definitely trigger a different cone response.

kayvonf

Think of metamers as indistinguishable to the brain when observed.

whdawn

Oh, I see, thanks Kayvon!