colour.models.ootf_reverse_BT2100_HLG¶

colour.models.ootf_reverse_BT2100_HLG(F_D, L_B=0, L_W=1000, gamma=None)[source]¶

Defines Recommendation ITU-R BT.2100 Reference HLG reverse opto-optical transfer function (OOTF / OOCF).

Parameters:	F_D (numeric or array_like) – \(F_D\) is the luminance of a displayed linear component \({R_D, G_D, or B_D}\), in \(cd/m^2\). L_B (numeric, optional) – \(L_B\) is the display luminance for black in \(cd/m^2\). L_W (numeric, optional) – \(L_W\) is nominal peak luminance of the display in \(cd/m^2\) for achromatic pixels. gamma (numeric, optional) – System gamma value, 1.2 at the nominal display peak luminance of \(1000 cd/m^2\).
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:	numeric or ndarray

Notes

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

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

References

Examples

>>> ootf_reverse_BT2100_HLG(63.095734448019336)  # doctest: +ELLIPSIS
0.1000000...