colour.models.oetf_BT2100_HLG#

colour.models.oetf_BT2100_HLG(E: ArrayLike, constants: Structure = CONSTANTS_BT2100_HLG) → NDArrayFloat[source]#

Define 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 value.

Parameters:

E (ArrayLike) – \(E\) is the signal for each colour component \({R_S, G_S, B_S}\) proportional to scene linear light and scaled by camera exposure.
constants (Structure) – 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`	[0, 1]	[0, 1]

Range	Scale - Reference	Scale - 1
`E_p`	[0, 1]	[0, 1]

References

Examples

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