colour.colorimetry.luminance_Fairchild2011

colour.colorimetry.luminance_Fairchild2011(L_hdr: Domain100, epsilon: ArrayLike = 0.474, method: Literal['hdr-CIELAB', 'hdr-IPT'] | str = 'hdr-CIELAB') → Range1

Compute luminance \(Y\) from the specified lightness \(L_{hdr}\) using Fairchild and Chen (2011) method according to Michaelis-Menten kinetics.

Parameters:

• L_hdr (Domain100) – Lightness \(L_{hdr}\).

• epsilon (ArrayLike) – \(\epsilon\) exponent.

• method (Literal['hdr-CIELAB', 'hdr-IPT'] | str) – Lightness \(L_{hdr}\) computation method.

Returns:

Luminance \(Y\).

Return type:

numpy.ndarray

Notes

Domain	Scale - Reference	Scale - 1
L_hdr	100	1

Range	Scale - Reference	Scale - 1
Y	1	1

References

[FC11]

Examples

>>> luminance_Fairchild2011(51.852958445912506)
0.1219722...
>>> luminance_Fairchild2011(51.643108411718522, method="hdr-IPT")
...
0.1219722...