colour.models.oetf_PQ_BT2100

colour.models.oetf_PQ_BT2100(E)[source]

Defines Recommendation ITU-R BT.2100 Reference PQ opto-electrical transfer function (OETF / OECF).

The OETF maps relative scene linear light into the non-linear PQ signal value.

Parameters

E (numeric or array_like) – \(E = {R_S, G_S, B_S; Y_S; or I_S}\) is the signal determined by scene light and scaled by camera exposure.

Returns

\(E'\) is the resulting non-linear signal (\(R'\), \(G'\), \(B'\)).

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

[Bor17], [InternationalTUnion17]

Examples

>>> oetf_PQ_BT2100(0.1)  
0.7247698...