colour.models.eotf_BT2020

colour.models.eotf_BT2020(E_p, is_12_bits_system=False, constants={'alpha': <function <lambda>>, 'beta': <function <lambda>>})[source]

Defines Recommendation ITU-R BT.2020 electro-optical transfer function (EOTF / EOCF).

Parameters:
  • E_p (numeric or array_like) – Non-linear signal \(E'\).
  • 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 voltage \(E\).

Return type:

numeric or ndarray

Notes

Domain Scale - Reference Scale - 1
E_p [0, 1] [0, 1]
Range Scale - Reference Scale - 1
E [0, 1] [0, 1]

References

[InternationalTelecommunicationUnion2015h]

Examples

>>> eotf_BT2020(0.705515089922121)  # doctest: +ELLIPSIS
0.4999999...