colour.models.oetf_H273_IEC61966_2#

colour.models.oetf_H273_IEC61966_2(L_c: ArrayLike) → NDArrayFloat[source]#

Define Recommendation ITU-T H.273 opto-electronic transfer function (OETF) for IEC 61966-2 family of transfer functions (2-1 sRGB, 2-1 sYCC, 2-4 xvYCC).

Parameters:: L_c (ArrayLike) – Scene Luminance \(L_c\).
Returns:: Corresponding electrical signal \(V\).
Return type:: numpy.ndarray

Notes

Usage in [InternationalTUnion21] is as follows:

For IEC 61966-2-1 sRGB (MatrixCoefficients=0), the function is only defined for \(L_c\) in [0-1] range.
For IEC 61966-2-1 sYCC (MatrixCoefficients=5) and IEC 61966-2-4 xvYCC, the function is defined for any real-valued \(L_c\).

Domain	Scale - Reference	Scale - 1
`L_c`	[0, 1]	[0, 1]

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

References

[InternationalTUnion21]

Examples

>>> oetf_H273_IEC61966_2(0.18)  
0.4613561295004...
>>> oetf_H273_IEC61966_2(-0.18)  
-0.4613561295004...

colour.models.oetf_H273_IEC61966_2#

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