colour.models.eotf_ST2084#

colour.models.eotf_ST2084(N: ArrayLike, L_p: float = 10000, constants: Structure | None = None) → NDArrayFloat[source]#

Apply the SMPTE ST 2084:2014 perceptual quantizer (PQ) electro-optical transfer function (EOTF).

Parameters:

N (ArrayLike) – Colour value abbreviated as \(N\), directly proportional to the encoded signal representation and not directly proportional to the optical output of a display device.
L_p (float) – System peak luminance in \(cd/m^2\). This parameter should remain at its default value of \(10000 cd/m^2\) for practical applications. It is exposed to enable the definition’s use as a fitting function.
constants (Structure | None) – SMPTE ST 2084:2014 constants.

Returns:

Target optical output \(C\) in \(cd/m^2\) of the ideal reference display.

Return type:

numpy.ndarray

Warning

SMPTE ST 2084:2014 is an absolute transfer function.

Notes

SMPTE ST 2084:2014 is an absolute transfer function, thus the domain and range values for the Reference and 1 scales are only indicative that the data is not affected by scale transformations.

Domain	Scale - Reference	Scale - 1
`N`	`UN`	`UN`

Range	Scale - Reference	Scale - 1
`C`	`UN`	`UN`

References

Examples

>>> eotf_ST2084(0.508078421517399)
100.0000000...