colour.models.oetf_inverse_BT2100_HLG#

colour.models.oetf_inverse_BT2100_HLG(E_p: ArrayLike, constants: Structure = CONSTANTS_BT2100_HLG) → NDArrayFloat[source]#

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

Parameters:

E_p (ArrayLike) – \(E'\) is the resulting non-linear signal \({R', G', B'}\).
constants (Structure) – Recommendation ITU-R BT.2100 Reference HLG constants.

Returns:

\(E\) is the signal for each colour component \({R_S, G_S, B_S}\) proportional to scene linear light and scaled by camera exposure.

Return type:

numpy.ndarray

Notes

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

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

References

Examples

>>> oetf_inverse_BT2100_HLG(0.212132034355964)  
0.0149999...