colour.ootf_inverse¶

colour.ootf_inverse(value: Union[float, numpy.typing._array_like._SupportsArray[numpy.dtype], numpy.typing._nested_sequence._NestedSequence[numpy.typing._array_like._SupportsArray[numpy.dtype]], bool, int, complex, str, bytes, numpy.typing._nested_sequence._NestedSequence[Union[bool, int, float, complex, str, bytes]]], function: Union[Literal['ITU-R BT.2100 HLG', 'ITU-R BT.2100 PQ'], str] = 'ITU-R BT.2100 PQ', **kwargs: Any) → Union[float, numpy.ndarray][source]¶

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

Parameters

value (Union[float, numpy.typing._array_like._SupportsArray[numpy.dtype], numpy.typing._nested_sequence._NestedSequence[numpy.typing._array_like._SupportsArray[numpy.dtype]], bool, int, complex, str, bytes, numpy.typing._nested_sequence._NestedSequence[Union[bool, int, float, complex, str, bytes]]]) – Value.
function (Union[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_HLG_BT2100(), colour.models.ootf_inverse_PQ_BT2100()}, See the documentation of the previously listed definitions.

Returns

Luminance of scene linear light.

Return type

numpy.floating or numpy.ndarray

Examples

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

colour.OOTFS

colour.OOTF_INVERSES