colour.XYZ_to_CAM02SCD

colour.XYZ_to_CAM02SCD(XYZ, **kwargs)[source]

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

Parameters

XYZ (array_like) – CIE XYZ tristimulus values.

Other Parameters

**kwargs (dict, optional) – {colour.XYZ_to_CIECAM02()}, Please refer to the documentation of the previously listed definition. The default viewing conditions are that of IEC 61966-2-1:1999, i.e. sRGB 64 Lux ambiant illumination, 80 \(cd/m^2\), adapting field luminance about 20% of a white object in the scene.

Returns

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

Return type

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

  • SCD in CAM02-SCD stands for Small Colour Differences.

Domain

Scale - Reference

Scale - 1

XYZ

[0, 1]

[0, 1]

Range

Scale - Reference

Scale - 1

Jpapbp

Jp : [0, 100]

ap : [-100, 100]

bp : [-100, 100]

Jp : [0, 1]

ap : [-1, 1]

bp : [-1, 1]

References

[LCL06]

Examples

>>> XYZ = np.array([0.20654008, 0.12197225, 0.05136952])
>>> XYZ_to_CAM02SCD(XYZ)  
array([ 46.6138615...,  25.6287988...,  10.3975548...])