colour.oetf_inverse#

colour.oetf_inverse(value: ArrayLike, function: LiteralOETFInverse | str = 'ITU-R BT.709', **kwargs: Any) → NDArrayFloat[source]#

Apply the specified inverse opto-electronic transfer function (OETF).

Parameters:

value (ArrayLike) – Non-linear signal value.
function (LiteralOETFInverse | str) – Inverse opto-electronic transfer function (OETF).
kwargs (Any) – {colour.models.oetf_inverse_ARIBSTDB67(), colour.models.oetf_inverse_BlackmagicFilmGeneration5(), colour.models.oetf_inverse_DaVinciIntermediate(), colour.models.oetf_inverse_BT2020(), colour.models.oetf_inverse_BT2100_HLG(), colour.models.oetf_inverse_BT2100_PQ(), colour.models.oetf_inverse_BT601(), colour.models.oetf_inverse_BT709()}, See the documentation of the previously listed definitions.

Returns:

Scene-linear value.

Return type:

numpy.ndarray

Examples

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