It is most important how to measure the spectral reflectance and transmittance of the image for color image analysis and evaluation. In this paper, the principles of the measurement of color; spectral reflectance, spectral transmittance, Ruther condition, multiband photometry and NCS (Natural Color System) are introduced and the definition of CIE 1976 (
L*
u*
v*), (
L*
a*
b*) spaces is also described.
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