# colour.models.eotf_inverse_ST2084#

colour.models.eotf_inverse_ST2084(C: ArrayLike, L_p: float = 10000, constants: Structure = CONSTANTS_ST2084) NDArrayFloat[source]#

Define SMPTE ST 2084:2014 optimised perceptual inverse electro-optical transfer function (EOTF).

Parameters:
• C (ArrayLike) – Target optical output $$C$$ in $$cd/m^2$$ of the ideal reference display.

• L_p (float) – System peak luminance $$cd/m^2$$, this parameter should stay at its default $$10000 cd/m^2$$ value for practical applications. It is exposed so that the definition can be used as a fitting function.

• constants (Structure) – SMPTE ST 2084:2014 constants.

Returns:

Color value abbreviated as $$N$$, that is directly proportional to the encoded signal representation, and which is not directly proportional to the optical output of a display device.

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. The effective domain of SMPTE ST 2084:2014 inverse electro-optical transfer function (EOTF) is [0.0001, 10000].

Domain

Scale - Reference

Scale - 1

C

UN

UN

Range

Scale - Reference

Scale - 1

N

UN

UN

References

Examples

>>> eotf_inverse_ST2084(100)
0.5080784...