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COLOR
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THE HUMAN EYE
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THE HUMAN EYE
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SPECTRAL ENERGY DISTRIBUTIONAND PHOTOPIC
LUMINANCE
I(l)
P(l)
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RADIANCE VS. LUMINANCE
RADIANCE
LUMINANCE
1 Watt/(meter2 x steradian x cosq)
683 Lumens at 555nm
Luminous Efficacy
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b(l)
g(l)
r(l)
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RED
magenta
yellow
BLUE
GREEN
cyan
RGB
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METAMERISM

• Two different Spectral Energy Distributions with
  the same RED, GREEN, BLUE response are termed
  metamers.

b(l)
g(l)
r(l)