colour.colorimetry.luminance_CIE1976#

colour.colorimetry.luminance_CIE1976(L_star: FloatingOrArrayLike, Y_n: FloatingOrArrayLike = 100) FloatingOrNDArray[source]#

Return the luminance \(Y\) of given Lightness \(L^*\) with given reference white luminance \(Y_n\).

Parameters
  • L_star (FloatingOrArrayLike) – Lightness \(L^*\)

  • Y_n (FloatingOrArrayLike) – White reference luminance \(Y_n\).

Returns

Luminance \(Y\).

Return type

numpy.floating or numpy.ndarray

Notes

Domain

Scale - Reference

Scale - 1

L_star

[0, 100]

[0, 1]

Range

Scale - Reference

Scale - 1

Y

[0, 100]

[0, 1]

References

[CIET14804h], [WS00l]

Examples

>>> luminance_CIE1976(41.527875844653451)  
12.1972253...
>>> luminance_CIE1976(41.527875844653451, 95)  
11.5873640...