colour.colorimetry.lightness_Fairchild2011¶
-
colour.colorimetry.
lightness_Fairchild2011
(Y, epsilon=0.474, method='hdr-CIELAB')[source]¶ Computes Lightness \(L_{hdr}\) of given luminance \(Y\) using Fairchild and Chen (2011) method according to Michealis-Menten kinetics.
- Parameters
Y (array_like) – luminance \(Y\).
epsilon (numeric or array_like, optional) – \(\epsilon\) exponent.
method (unicode, optional) – {‘hdr-CIELAB’, ‘hdr-IPT’}, Lightness \(L_{hdr}\) computation method.
- Returns
Lightness \(L_{hdr}\).
- Return type
array_like
Notes
Domain
Scale - Reference
Scale - 1
Y
[0, 1]
[0, 1]
Range
Scale - Reference
Scale - 1
L_hdr
[0, 100]
[0, 1]
References
Examples
>>> lightness_Fairchild2011(12.19722535 / 100) 51.8529584... >>> lightness_Fairchild2011(12.19722535 / 100, method='hdr-IPT') ... 51.6431084...