colour.models.eotf_ST2084#
- colour.models.eotf_ST2084(N: ArrayLike, L_p: float = 10000, constants: Structure = CONSTANTS_ST2084) NDArrayFloat [source]#
Define SMPTE ST 2084:2014 optimised perceptual electro-optical transfer function (EOTF).
This perceptual quantizer (PQ) has been modeled by Dolby Laboratories using Barten (1999) contrast sensitivity function.
- Parameters:
N (ArrayLike) – Color value abbreviated as \(N\), that is directly proportional to the encoded signal representation, and which is not directly proportional to the optical output of a display device.
L_p (float) – System peak luminance \(cd/m^2\), this parameter should stay at its default \(10000 cd/m^2\) value for practical applications. It is exposed so that the definition can be used as a fitting function.
constants (Structure) – SMPTE ST 2084:2014 constants.
- Returns:
Target optical output \(C\) in \(cd/m^2\) of the ideal reference display.
- Return type:
Warning
SMPTE ST 2084:2014 is an absolute transfer function.
Notes
SMPTE ST 2084:2014 is an absolute transfer function, 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
N
UN
UN
Range
Scale - Reference
Scale - 1
C
UN
UN
References
[Mil14], [SocietyoMPaTEngineers14]
Examples
>>> eotf_ST2084(0.508078421517399) 100.0000000...