colour.models.ootf_BT2100_HLG¶
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colour.models.
ootf_BT2100_HLG
(E, L_B=0, L_W=1000, gamma=None)[source]¶ Defines Recommendation ITU-R BT.2100 Reference HLG opto-optical transfer function (OOTF / OOCF).
The OOTF maps relative scene linear light to display linear light.
Parameters: - E (numeric or array_like) – \(E\) is the signal for each colour component \({R_S, G_S, B_S}\) proportional to scene linear light and scaled by camera exposure, normalized to the range [0, 1].
- 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: \(F_D\) is the luminance of a displayed linear component \({R_D, G_D, or B_D}\), in \(cd/m^2\).
Return type: numeric or ndarray
References
Examples
>>> ootf_BT2100_HLG(0.1) 63.0957344...