PR-655/670 User Manual
56
Once the three Tristimulus values have been derived, useful colorimetric values such as CIE 1931 x, y and 1976
u’,
v’
can be calculated by the following formulae:
CIE 1931 x, y
Z
Y
X
X
x
+
+
=
Z
Y
X
Y
y
+
+
=
CIE 1976 u’, v’
(
)
Z
Y
X
X
u
3
15
/
4
'
+
+
=
(
)
Z
Y
X
Y
v
3
15
/
9
'
+
+
=
