colour.models.oetf_inverse_ARIBSTDB67¶
-
colour.models.
oetf_inverse_ARIBSTDB67
(E_p, r=0.5, constants={'a': 0.17883277, 'b': 0.28466892, 'c': 0.55991073})[source]¶ Defines ARIB STD-B67 (Hybrid Log-Gamma) inverse opto-electrical transfer function (OETF / OECF).
- Parameters
E_p (numeric or array_like) – Non-linear signal \(E'\).
r (numeric, optional) – Video level corresponding to reference white level.
constants (Structure, optional) – ARIB STD-B67 (Hybrid Log-Gamma) constants.
- Returns
Voltage \(E\) normalised by the reference white level and proportional to the implicit light intensity that would be detected with a reference camera color channel R, G, B.
- Return type
numeric or ndarray
Notes
Domain
Scale - Reference
Scale - 1
E_p
[0, 1]
[0, 1]
Range
Scale - Reference
Scale - 1
E
[0, 1]
[0, 1]
This definition uses the mirror negative number handling mode of
colour.models.gamma_function()
definition to the sign of negative numbers.
References
Examples
>>> oetf_inverse_ARIBSTDB67(0.212132034355964) 0.1799999...