Color perception
Rods and cones act as filters on the spectrum
To get the output of a filter, multiply its response curve by the
spectrum, integrate over all wavelengths
Each cone yields one number
Q:
How can we represent an entire spectrum with 3 numbers?
S
M
L
Wavelength
Power
A:
We cant!
Most of the information is lost.
As a result, two different spectra may appear indistinguishable
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such spectra are known as
metamers
»
http://www.cs.brown.edu/exploratory/research/applets/repository/spectrum/metamers.html
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