colour.models.eotf_inverse_H273_ST428_1

colour.models.eotf_inverse_H273_ST428_1(L_o: ArrayLike) → NDArrayFloat

Define Recommendation ITU-T H.273 inverse electro-optical transfer function (EOTF) for SMPTE ST 428-1 (2019).

Parameters:

L_o (ArrayLike) – Output display Luminance \(L_o\) of the image.

Returns:

Corresponding electrical signal \(V\).

Return type:

numpy.ndarray

Notes

• The function given in [InternationalTUnion21] multiplies \(L_o\) by 48 contrary to what is given in [SocietyoMPaTEngineers19] and colour.models.eotf_inverse_DCDM().

Domain	Scale - Reference	Scale - 1
L_o	[0, 1]	[0, 1]

Range	Scale - Reference	Scale - 1
V	[0, 1]	[0, 1]

References

• [InternationalTUnion21], [SocietyoMPaTEngineers19]

Examples

>>> eotf_inverse_H273_ST428_1(0.18)  
0.5000483...