colour.models.oetf_BT2100_PQ

colour.models.oetf_BT2100_PQ(E)

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. The values \(E\), \(R_S\), \(G_S\), \(B_S\), \(Y_S\), \(I_S\) are in the range [0, 1]. Returns:\(E\) is the resulting non-linear signal (\(R'\), \(G'\), \(B'\)) in the range [0, 1]. Return type:numeric or ndarray

References

• [Bor17]
• [InternationalTUnion16]

Examples

>>> oetf_BT2100_PQ(0.1)  
0.7247698...