colour.models.ootf_inverse_BT2100_HLG#
- colour.models.ootf_inverse_BT2100_HLG(F_D: ArrayLike, L_B: float = 0, L_W: float = 1000, gamma: float | None = None, 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 opto-optical transfer function (OOTF / OOCF).
- Parameters:
F_D (ArrayLike) – \(F_D\) is the luminance of a displayed linear component \({R_D, G_D, or B_D}\), 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 \(1000 cd/m^2\).
method (Literal['ITU-R BT.2100-1', 'ITU-R BT.2100-2'] | str) – Computation method.
- 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:
Notes
Domain
Scale - Reference
Scale - 1
F_D
[0, 1]
[0, 1]
Range
Scale - Reference
Scale - 1
E
[0, 1]
[0, 1]
References
[Bor17], [InternationalTUnion17], [InternationalTUnion18]
Examples
>>> ootf_inverse_BT2100_HLG(63.095734448019336) 0.1000000... >>> ootf_inverse_BT2100_HLG(63.105103490674857, 0.01, method="ITU-R BT.2100-1") ... 0.0999999...