colour.eotf_inverse¶

colour.eotf_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['DCDM', 'DICOM GSDF', 'ITU-R BT.1886', 'ITU-R BT.2020', 'ITU-R BT.2100 HLG', 'ITU-R BT.2100 PQ', 'ST 2084', 'sRGB'], str] = 'ITU-R BT.1886', **kwargs) → Union[float, numpy.ndarray, int][source]¶

Encode estimated tristimulus values in a scene to \(R'G'B'\) video component signal value using given inverse electro-optical transfer function (EOTF).

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['DCDM', 'DICOM GSDF', 'ITU-R BT.1886', 'ITU-R BT.2020', 'ITU-R BT.2100 HLG', 'ITU-R BT.2100 PQ', 'ST 2084', 'sRGB'], str]) – Inverse electro-optical transfer function (EOTF).
kwargs – {colour.models.eotf_inverse_DCDM(), colour.models.eotf_inverse_DICOMGSDF(), colour.models.eotf_inverse_BT1886(), colour.models.eotf_inverse_BT2020(), colour.models.eotf_inverse_HLG_BT2100(), colour.models.eotf_inverse_PQ_BT2100(), colour.models.eotf_inverse_ST2084(), colour.models.eotf_inverse_sRGB()}, See the documentation of the previously listed definitions.

Returns

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

Return type

numpy.floating or numpy.integer or numpy.ndarray

Examples

>>> eotf_inverse(0.11699185725296059)  
0.4090077...
>>> eotf_inverse(  
...     0.11699185725296059, function='ITU-R BT.1886')
0.4090077...

colour.EOTFS

colour.EOTF_INVERSES