HunterLab SpectraTrend HT, Руководство пользователя

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SpectraTrend HT User’s Guide 3.2
98
Difference Color Scales (available when Display Type is Difference; Reading of Both
Standard and Sample Required)
dXdYdZ
This scale yields the color difference between the sample and the standard via the CIE XYZ scale.
dX = X
sample
- X
standard
dY = Y
sample
- Y
standard
dZ = Z
sample
- Z
standard
.
dYdxdy
This scale yields the color difference between the sample and the standard via the CIE Yxy scale.
dY = Y
sample
- Y
standard
dx = x
sample
- x
standard
dy = y
sample
- y
standard.
dLdadb
This scale yields the color difference between the sample and the standard via the Hunter L, a, b scale.
dL = L
sample
- L
standard
(If dL is positive, the sample is lighter than the standard. If dL is
negative, the sample is darker than the standard.)
da = a
sample
- a
standard
(If da is positive, the sample is redder than the standard. If da is
negative, the sample is greener than the standard.)
db = b
sample
= b
standard
(If db is positive, the sample is yellower than the standard. If db
is negative, the sample is bluer than the standard.)
dL*da*db
This scale yields the color difference between the sample and the standard via the CIE L*a*b* scale.
dL* = L*
sample
- L*
standard
da* = a*
sample
- a*
standard
db* - b*
sample
- b*
standard
For more information, see AATCC Test Method 173: Calculation of Small Color Differences .