colour.XYZ_to_IPT_Ragoo2021#

colour.XYZ_to_IPT_Ragoo2021(XYZ: ArrayLike) → NDArrayFloat[source]#

Convert from CIE XYZ tristimulus values to Ragoo and Farup (2021) Optimised IPT colourspace.

Parameters:

XYZ (ArrayLike) – CIE XYZ tristimulus values.

Returns:

Ragoo and Farup (2021) Optimised IPT colourspace array.

Return type:

numpy.ndarray

Notes

Domain

Scale - Reference

Scale - 1

XYZ

[0, 1]

[0, 1]

Range

Scale - Reference

Scale - 1

IPT

I : [0, 1]

P : [-1, 1]

T : [-1, 1]

I : [0, 1]

P : [-1, 1]

T : [-1, 1]

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

References

[RF21]

Examples

>>> XYZ = np.array([0.20654008, 0.12197225, 0.05136952])
>>> XYZ_to_IPT_Ragoo2021(XYZ)  
array([ 0.4224824...,  0.2910514...,  0.2041066...])