colour.models.oetf_reverse_ARIBSTDB67¶
-
colour.models.
oetf_reverse_ARIBSTDB67
(E_p, r=0.5, constants={'a': 0.17883277, 'b': 0.28466892, 'c': 0.55991073})[source]¶ Defines ARIB STD-B67 (Hybrid Log-Gamma) reverse 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] References
Examples
>>> oetf_reverse_ARIBSTDB67(0.212132034355964) # doctest: +ELLIPSIS 0.1799999...