colour.XYZ_to_ICaCb

colour.XYZ_to_ICaCb(XYZ: ArrayLike) → NDArrayFloat

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

Parameters:

XYZ (ArrayLike) – CIE XYZ tristimulus values.

Returns:

\(IC_AC_B\) colourspace array.

Return type:

numpy.ndarray

Notes

Domain	Scale - Reference	Scale - 1
XYZ	[0, 1]	[0, 1]

Range	Scale - Reference	Scale - 1
ICaCb	I : [0, 1] Ca : [-1, 1] Cb : [-1, 1]	I : [0, 1] Ca: [-1, 1] Cb: [-1, 1]

• Input CIE XYZ tristimulus values must be adapted to CIE Standard Illuminant D Series D65.

References

[Frohlich17]

Examples

>>> XYZ = np.array([0.20654008, 0.12197225, 0.05136952])
>>> XYZ_to_ICaCb(XYZ)
array([ 0.06875297,  0.05753352,  0.02081548])