colour.CAM16LCD_to_XYZ#

colour.CAM16LCD_to_XYZ(Jpapbp: ArrayLike, *, coefficients: ArrayLike = (0.77, 0.007, 0.0053), **kwargs: Any) NDArrayFloat#

Convert from Li et al. (2017) CAM16-LCD colourspace \(J'a'b'\) array to CIE XYZ tristimulus values.

Parameters:
  • Jpapbp (ArrayLike) – Li et al. (2017) CAM16-LCD colourspace \(J'a'b'\) array.

  • kwargs (Any) – {colour.CAM16_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.

  • coefficients (ArrayLike)

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 CAM16-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

[LLW+17]