CIE 1964
10-deg, XYZ Color Matching Functions
Stiles and Burch (1959) 10-deg, RGB Color Matching Functions
Stiles and
Burch (1955) 2-deg, RGB Color Matching Functions
CIE 1931 2-deg,
XYZ Color Matching Functions
modified by Judd
(1951)
modified by Judd
(1951) and Vos (1978)
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