colour.Jzazbz_to_XYZ#

colour.Jzazbz_to_XYZ(Jzazbz: Domain1, constants: Structure = CONSTANTS_JZAZBZ_SAFDAR2017) → NDArrayFloat[source]#

Convert from \(J_za_zb_z\) colourspace to CIE XYZ tristimulus values.

Parameters:

Jzazbz (Domain1) – \(J_za_zb_z\) colourspace array where \(J_z\) is Lightness, \(a_z\) is redness-greenness and \(b_z\) is yellowness-blueness.
constants (Structure) – \(J_za_zb_z\) colourspace constants.

Returns:

CIE XYZ tristimulus values under CIE Standard Illuminant D Series D65.

Return type:

numpy.ndarray

Warning

The underlying SMPTE ST 2084:2014 transfer function is an absolute transfer function.

Notes

The underlying SMPTE ST 2084:2014 transfer function 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
`Jzazbz`	1	1

Range	Scale - Reference	Scale - 1
`XYZ`	`UN`	`UN`

References

Examples

>>> Jzazbz = np.array([0.00535048, 0.00924302, 0.00526007])
>>> Jzazbz_to_XYZ(Jzazbz)
array([ 0.2065402...,  0.1219723...,  0.0513696...])