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colorSpec (version 1.5-0)

ABC: Standard Illuminants A, B, and C (1931)

Description

A.1nmstandard Illuminant A, 360 to 780 nm at 1 nm intervals
B.5nmstandard Illuminant B, 320 to 780 nm at 5 nm intervals
C.5nmstandard Illuminant C, 320 to 780 nm at 5 nm intervals

Arguments

Format

Each is a colorSpec object organized as a vector, with quantity equal to "energy".

Details

All of these have been divided by 100, to make the values at 560nm near 1 instead of 100.

References

Günther Wyszecki and W. S. Stiles. Color Science : Concepts and Methods, Quantitative Data and Formulae. Second Edition. Wiley-Interscience. 1982.

ATable I(3.3.4) pp. 754-758.
BTable II(3.3.4) pp. 759.
CTable II(3.3.4) pp. 759.

See Also

D50 D65

Examples

Run this code
summary(xyz1931.1nm)
white.point = product( D65.1nm, xyz1931.1nm, wave='auto' )

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