colour.models.oetf_BT2020¶
-
colour.models.
oetf_BT2020
(E, is_12_bits_system=False, constants={'alpha': <function <lambda>>, 'beta': <function <lambda>>})[source]¶ Defines Recommendation ITU-R BT.2020 opto-electrical transfer function (OETF / OECF).
- Parameters
E (numeric or array_like) – Voltage \(E\) normalised by the reference white level and proportional to the implicit light intensity that would be detected with a reference camera colour channel R, G, B.
is_12_bits_system (bool, optional) – BT.709 alpha and beta constants are used if system is not 12-bit.
constants (Structure, optional) – Recommendation ITU-R BT.2020 constants.
- Returns
Resulting non-linear signal \(E'\).
- Return type
numeric or ndarray
Notes
Domain
Scale - Reference
Scale - 1
E
[0, 1]
[0, 1]
Range
Scale - Reference
Scale - 1
E_p
[0, 1]
[0, 1]
References
Examples
>>> oetf_BT2020(0.18) 0.4090077...