colour.difference.delta_E_CAM02SCD

colour.difference.delta_E_CAM02SCD(Jpapbp_1, Jpapbp_2)

Returns the difference \(\Delta E'\) between two given Luo et al. (2006) CAM02-SCD colourspaces \(J'a'b'\) arrays.

Parameters

• Jpapbp_1 (array_like) – Standard / reference Luo et al. (2006) CAM02-SCD colourspaces \(J'a'b'\) array.

• Jpapbp_2 (array_like) – Sample / test Luo et al. (2006) CAM02-SCD colourspaces \(J'a'b'\) array.

Returns

Colour difference \(\Delta E'\).

Return type

numeric or ndarray

Warning

The \(J'a'b'\) array should have been computed with a Luo et al. (2006) CAM02-LCD, CAM02-SCD, or CAM02-UCS colourspace and not with the CIE L*a*b* colourspace.

Notes

Domain	Scale - Reference	Scale - 1
Jpapbp_1	Jp_1 : [0, 100] ap_1 : [-100, 100] bp_1 : [-100, 100]	Jp_1 : [0, 1] ap_1 : [-1, 1] bp_1 : [-1, 1]
Jpapbp_2	Jp_2 : [0, 100] ap_2 : [-100, 100] bp_2 : [-100, 100]	Jp_2 : [0, 1] ap_2 : [-1, 1] bp_2 : [-1, 1]

References

[LCL06]

Examples

>>> Jpapbp_1 = np.array([54.90433134, -0.08450395, -0.06854831])
>>> Jpapbp_2 = np.array([54.80352754, -3.96940084, -13.57591013])
>>> delta_E_CAM02SCD(Jpapbp_1, Jpapbp_2)  
14.0551718...