The CIE metameric
index, (4) MI, is the total color difference between the metameric
pair under the test conditions.
Relative spectral power distribution of the first and fifth WLL based on first set of LED metameric
to reference DAY and A sources are presented in Fig.
A spectral comparison must always be undertaken because different curves, such as those from metameric
samples, can yield similar chromaticity coordinates.
All visible stimuli have a metameric
colour (physically different, perceptually identical) produced by the mixture of an equienergetic stimulation (or another reference white) plus a monochromatic stimulus.
The results can be expressed in a choice of colour difference measurements - XYZ tristimulus values, GTE, Whiteness index, Yellowness index, reflectance, metameric
Whilst this color can be matched by blending copper phthalocyanine blue and green, the blend will not be as clean and transparent and will further be metameric
compared to the single pigmented color.
color matches are common when different pigments or dyestuffs are used to color the two materials.
equivalent classes of a trichromat require three degrees of freedom - of a tetrachromat, four degrees.
The ontogenies of all seed plant female gametophytes are determinate, nonmetameric (the sporophytes of seed plants have an indeterminate and metameric
architecture), and as a consequence of being the sexual generation of the life cycle, involve the differentiation of gametes.
Following the tradition of Marr, some philosophers have supposed that the biological function of colour vision is the recovery of the spectral reflectances of surfaces, and that the wide content of colour vision is to be identified with the (human) metameric
classes of such spectral reflectances.
The hypertrophy is related to the variation of the ratio between elastic fibres and collagen fibres in the most superficial layer of the ligamentum flavum, due to the micro traumatism produced by metameric
instability on the ligamentum.
The second type called compensation approach reinserts metameric
black spectrum to compensate for the loss of spectral details caused by the colorimetric tristimulus values.