colour.models.oetf_ARIBSTDB67

colour.models.oetf_ARIBSTDB67(E: FloatingOrArrayLike, r: FloatingOrArrayLike = 0.5, constants: colour.utilities.data_structures.Structure = CONSTANTS_ARIBSTDB67) → FloatingOrNDArray[source]

Define ARIB STD-B67 (Hybrid Log-Gamma) opto-electrical transfer function (OETF).

Parameters

  • E (FloatingOrArrayLike) – Voltage normalised by the reference white level and proportional to the implicit light intensity that would be detected with a reference camera color channel R, G, B.

  • r (FloatingOrArrayLike) – Video level corresponding to reference white level.

  • constants (colour.utilities.data_structures.Structure) – ARIB STD-B67 (Hybrid Log-Gamma) constants.

Returns

Resulting non-linear signal \(E'\).

Return type

numpy.floating or numpy.ndarray

Notes

Domain

Scale - Reference

Scale - 1

E

[0, 1]

[0, 1]

Range

Scale - Reference

Scale - 1

E_p

[0, 1]

[0, 1]

  • This definition uses the mirror negative number handling mode of colour.models.gamma_function() definition to the sign of negative numbers.

References

[AssociationoRIaBusinesses15]

Examples

>>> oetf_ARIBSTDB67(0.18)  
0.2121320...

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