colour.models.oetf_BT2100_HLG

colour.models.oetf_BT2100_HLG(E: Annotated[_Buffer | _SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | complex | bytes | str | _NestedSequence[complex | bytes | str], 1], constants: Structure | None = None) → Annotated[ndarray[tuple[Any, ...], dtype[float16 | float32 | float64]], 1]

Apply the Recommendation ITU-R BT.2100 Reference HLG opto-electrical transfer function (OETF).

The OETF maps relative scene linear light into the non-linear HLG signal

Parameters:

• E (Annotated[_Buffer | _SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | complex | bytes | str | _NestedSequence[complex | bytes | str], 1]) – \(E = \{R_S, G_S, B_S; Y_S; \text{or } I_S\}\) denotes the signal determined by scene light and scaled by camera exposure.

• constants (Structure | None) – Recommendation ITU-R BT.2100 Reference HLG constants.

Returns:

\(E'\) is the resulting non-linear signal \(\{R', G', B'\}\).

Return type:

numpy.ndarray

Notes

Domain	Scale - Reference	Scale - 1
E	1	1

Range	Scale - Reference	Scale - 1
E_p	1	1

References

[Bor17], [InternationalTUnion17]

Examples

>>> oetf_BT2100_HLG(0.18 / 12)
0.2121320...