colour.XYZ_to_CAM02UCS#

colour.XYZ_to_CAM02UCS(XYZ: Domain1, **kwargs: Any) → Range100[source]#

Convert from CIE XYZ tristimulus values to Luo et al. (2006) CAM02-UCS colourspace \(J'a'b'\) array.

Parameters:

XYZ (Domain1) – CIE XYZ tristimulus values.
kwargs (Any) – {colour.XYZ_to_CIECAM02()}, See the documentation of the previously listed definition. The default viewing conditions are those of IEC 61966-2-1:1999, i.e., sRGB 64 Lux ambient illumination, 80 \(cd/m^2\), adapting field luminance about 20% of a white object in the scene.

Returns:

Luo et al. (2006) CAM02-UCS colourspace \(J'a'b'\) array.

Return type:

numpy.ndarray

Warning

The XYZ_w parameter for colour.XYZ_to_CAM16() definition must be specified in the same domain-range scale as the XYZ parameter.

Notes

Domain	Scale - Reference	Scale - 1
`XYZ`	1	1

Range	Scale - Reference	Scale - 1
`Jpapbp`	100	1

References

Examples

>>> XYZ = np.array([0.20654008, 0.12197225, 0.05136952])
>>> XYZ_to_CAM02UCS(XYZ)
array([46.6138615..., 29.8831001..., 12.1235168...])