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redness or greenness of a sample. A positive value
of
a*
indicates a sample is red, while a negative
value for
a*
indicates a green sample. The
b*
parameter indicates the yellowness or blueness of a
sample. A positive value of
b*
indicates a sample is
yellow, while a negative value for
b*
indicates a
blue sample.
Yellowness (E313)
The Yellowness index,
computed using the ASTM E-313 equation, is
displayed. This index provides an indication of
sample whiteness.
Yellowness (1925)
The Yellowness index,
computed using the ASTM D-1925 equation, is
displayed. This index provides an indication of
sample yellowness.
Whiteness (CIE)
The Whiteness index,
computed using the equation outlined in CIE
Publication 15.2, is displayed. This index provides
an indication of sample whiteness.
Whiteness (E313)
The Whiteness index,
computed using ASTM E-313 equation, is
displayed. This index provides an indication of
sample whiteness.
Closest (DE*)
This display mode will show the
closest sample contained in the systems fandeck
database using total color difference,
DE*,
as a
selection criteria using D65 as the light source. The
DE*
is an overall indication of color difference,
which includes both lightness, redness/greenness
and yellowness/blueness.
L/D Neighbors
This display mode will show the
two closest samples contained in the systems
fandeck database using
DL*
as a selection criteria
using D65 as the light source.
R/G Neighbors
This display mode will show the
two closest samples contained in the systems
fandeck database using
Da*
as a selection criteria
using D65 as the light source.
Y/B Neighbors
This display mode will show the
two closest samples contained in the systems
fandeck database using
Db*
as a selection criteria
using D65 as the light source.
DL*, Da*, Db*, DE*
(vs. std) This mode combines
the CIELAB differences for total color difference,
lightness, redness/greenness and
yellowness/blueness for the active sample compared
