colour.colorimetry.lightness_Abebe2017¶
- colour.colorimetry.lightness_Abebe2017(Y: FloatingOrArrayLike, Y_n: FloatingOrArrayLike = 100, method: Union[Literal['Michaelis-Menten', 'Stevens'], str] = 'Michaelis-Menten') FloatingOrNDArray [source]¶
Compute Lightness \(L\) of given luminance \(Y\) using Abebe, Pouli, Larabi and Reinhard (2017) method according to Michaelis-Menten kinetics or Stevens’s Power Law.
- Parameters
- Returns
Lightness \(L\).
- Return type
Notes
Abebe, Pouli, Larabi and Reinhard (2017) method uses absolute luminance levels, thus the domain and range values for the Reference and 1 scales are only indicative that the data is not affected by scale transformations.
Domain
Scale - Reference
Scale - 1
Y
UN
UN
Y_n
UN
UN
Range
Scale - Reference
Scale - 1
L
UN
UN
References
[APLR17]
Examples
>>> lightness_Abebe2017(12.19722535) 0.4869555... >>> lightness_Abebe2017(12.19722535, method='Stevens') ... 0.4745447...