colour.ootf_inverse

colour.ootf_inverse(value: _SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | bool | int | float | complex | str | bytes | _NestedSequence[bool | int | float | complex | str | bytes], function: Literal['ITU-R BT.2100 HLG', 'ITU-R BT.2100 PQ'] | str = 'ITU-R BT.2100 PQ', **kwargs: Any) → ndarray[Any, dtype[float16 | float32 | float64]]

Map relative display linear light to scene linear light using given inverse opto-optical transfer function (OOTF / OOCF).

Parameters:

• value (_SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | bool | int | float | complex | str | bytes | _NestedSequence[bool | int | float | complex | str | bytes]) – Value.

• function (Literal['ITU-R BT.2100 HLG', 'ITU-R BT.2100 PQ'] | str) – Inverse opto-optical transfer function (OOTF / OOCF).

• kwargs (Any) – {colour.models.ootf_inverse_BT2100_HLG(), colour.models.ootf_inverse_BT2100_PQ()}, See the documentation of the previously listed definitions.

Returns:

Luminance of scene linear light.

Return type:

numpy.ndarray

Examples

>>> ootf_inverse(779.988360834115840)  
0.1000000...
>>> ootf_inverse(  
...     63.095734448019336, function="ITU-R BT.2100 HLG"
... )
0.1000000...