colour.oetf#

colour.oetf(value: Union[float, _SupportsArray[dtype], _NestedSequence[_SupportsArray[dtype]], bool, int, complex, str, bytes, _NestedSequence[Union[bool, int, float, complex, str, bytes]]], function: Union[Literal['ARIB STD-B67', 'Blackmagic Film Generation 5', 'DaVinci Intermediate', 'ITU-R BT.2020', 'ITU-R BT.2100 HLG', 'ITU-R BT.2100 PQ', 'ITU-R BT.601', 'ITU-R BT.709', 'ITU-T H.273 Log', 'ITU-T H.273 Log Sqrt', 'ITU-T H.273 IEC 61966-2', 'SMPTE 240M'], str] = 'ITU-R BT.709', **kwargs: Any) Union[float, ndarray][source]#

Encode estimated tristimulus values in a scene to \(R'G'B'\) video component signal value using given opto-electronic transfer function (OETF).

Parameters:
Returns:

\(R'G'B'\) video component signal value.

Return type:

numpy.floating or numpy.ndarray

Examples

>>> oetf(0.18)  
0.4090077...
>>> oetf(0.18, function="ITU-R BT.601")  
0.4090077...