colour.models.eotf_inverse_BT2100_HLG#
- colour.models.eotf_inverse_BT2100_HLG(F_D: ArrayLike, L_B: float = 0, L_W: float = 1000, gamma: float | None = None, constants: Structure = CONSTANTS_BT2100_HLG, method: Literal['ITU-R BT.2100-1', 'ITU-R BT.2100-2'] | str = 'ITU-R BT.2100-2') NDArrayFloat [source]#
Define Recommendation ITU-R BT.2100 Reference HLG inverse electro-optical transfer function (EOTF).
- Parameters:
F_D (ArrayLike) – Luminance \(F_D\) of a displayed linear component \({R_D, G_D, B_D}\) or \(Y_D\) or \(I_D\), in \(cd/m^2\).
L_B (float) – \(L_B\) is the display luminance for black in \(cd/m^2\).
L_W (float) – \(L_W\) is nominal peak luminance of the display in \(cd/m^2\) for achromatic pixels.
gamma (float | None) – System gamma value, 1.2 at the nominal display peak luminance of \(1000 cd/m^2\).
constants (Structure) – Recommendation ITU-R BT.2100 Reference HLG constants.
method (Literal['ITU-R BT.2100-1', 'ITU-R BT.2100-2'] | str) – Computation method.
- Returns:
\(E'\) denotes a non-linear colour value \({R', G', B'}\) or \({L', M', S'}\) in HLG space.
- Return type:
Notes
Domain
Scale - Reference
Scale - 1
F_D
[0, 1]
[0, 1]
Range
Scale - Reference
Scale - 1
E_p
[0, 1]
[0, 1]
References
[Bor17], [InternationalTUnion17], [InternationalTUnion18]
Examples
>>> eotf_inverse_BT2100_HLG(6.476039825649814) 0.2121320... >>> eotf_inverse_BT2100_HLG(6.476039825649814, method="ITU-R BT.2100-1") ... 0.2121320... >>> eotf_inverse_BT2100_HLG(7.332197528353875, 0.01) 0.2121320...