colour.oetf_inverse#

colour.oetf_inverse(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'], str] = 'ITU-R BT.709', **kwargs: Any) Union[float, ndarray][source]#

Decode \(R'G'B'\) video component signal value to tristimulus values at the display using given inverse opto-electronic transfer function (OETF).

Parameters:
Returns:

Tristimulus values at the display.

Return type:

numpy.floating or numpy.ndarray

Examples

>>> oetf_inverse(0.409007728864150)  
0.1...
>>> oetf_inverse(  
...     0.409007728864150, function="ITU-R BT.601"
... )
0.1...