colour.colorimetry.intermediate_luminance_function_CIE1976#

colour.colorimetry.intermediate_luminance_function_CIE1976(f_Y_Y_n: ArrayLike, Y_n: ArrayLike = 100) → NDArrayFloat[source]#

Compute luminance \(Y\) from the specified intermediate value \(f(Y/Y_n)\) using the specified reference white luminance \(Y_n\) as per CIE 1976 recommendation.

Parameters:

  • f_Y_Y_n (ArrayLike) – Intermediate value \(f(Y/Y_n)\).

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

Returns:

Luminance \(Y\).

Return type:

numpy.ndarray

Notes

Domain

Scale - Reference

Scale - 1

f_Y_Y_n

1

1

Range

Scale - Reference

Scale - 1

Y

100

100

References

[CIET14804h], [WS00l]

Examples

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