colour.colorimetry.luminance_CIE1976

colour.colorimetry.luminance_CIE1976(L_star, Y_n=100)[source]

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

Parameters:
  • L_star (numeric or array_like) – Lightness \(L^*\)
  • Y_n (numeric or array_like) – White reference luminance \(Y_n\).
Returns:

luminance \(Y\).

Return type:

numeric or array_like

Notes

Domain Scale - Reference Scale - 1
L_star [0, 100] [0, 1]
Range Scale - Reference Scale - 1
Y [0, 100] [0, 1]

References

[CIETC1-482004m], [Wyszecki2000bd]

Examples

>>> luminance_CIE1976(41.527875844653451)  # doctest: +ELLIPSIS
12.1972253...
>>> luminance_CIE1976(41.527875844653451, 95)  # doctest: +ELLIPSIS
11.5873640...