colour.CAM02LCD_to_XYZ#

colour.CAM02LCD_to_XYZ(Jpapbp: ArrayLike, **kwargs: Any) → ndarray[source]#

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

Parameters:

  • Jpapbp (ArrayLike) – Luo et al. (2006) CAM02-LCD colourspace \(J'a'b'\) array.

  • kwargs (Any) – {colour.CIECAM02_to_XYZ()}, See the documentation of the previously listed definition. The default viewing conditions are that 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:

CIE XYZ tristimulus values.

Return type:

numpy.ndarray

Warning

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

Notes

  • LCD in CAM02-LCD stands for Large Colour Differences.

Domain

Scale - Reference

Scale - 1

Jpapbp

Jp : [0, 100]

ap : [-100, 100]

bp : [-100, 100]

Jp : [0, 1]

ap : [-1, 1]

bp : [-1, 1]

Range

Scale - Reference

Scale - 1

XYZ

[0, 1]

[0, 1]

References

[LCL06]

Examples

>>> Jpapbp = np.array([46.61386154, 39.35760236, 15.96730435])
>>> CAM02LCD_to_XYZ(Jpapbp)  
array([ 0.2065400...,  0.1219722...,  0.0513695...])