colour.colorimetry.intermediate_luminance_function_CIE1976#

colour.colorimetry.intermediate_luminance_function_CIE1976(f_Y_Y_n: FloatingOrArrayLike, Y_n: FloatingOrArrayLike = 100) FloatingOrNDArray[source]#

Return the luminance \(Y\) in the luminance \(Y\) computation for given intermediate value \(f(Y/Yn)\) using given reference white luminance \(Y_n\) as per CIE 1976 recommendation.

Parameters
  • f_Y_Y_n (FloatingOrArrayLike) – Intermediate value \(f(Y/Yn)\).

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

Returns

Luminance \(Y\).

Return type

numpy.floating or numpy.ndarray

Notes

Domain

Scale - Reference

Scale - 1

f_Y_Y_n

[0, 1]

[0, 1]

Range

Scale - Reference

Scale - 1

Y

[0, 100]

[0, 100]

References

[CIET14804h], [WS00l]

Examples

>>> intermediate_luminance_function_CIE1976(0.495929964178047)
... 
12.1972253...
>>> intermediate_luminance_function_CIE1976(0.504482161449319, 95)
... 
12.1972253...