colour.difference.delta_E_CAM16UCS#

colour.difference.delta_E_CAM16UCS(Jpapbp_1, Jpapbp_2)#

Return the difference \(\Delta E'\) between two given Li et al. (2017) CAM16-UCS colourspaces \(J'a'b'\) arrays.

Parameters
  • Jpapbp_1 – Standard / reference Li et al. (2017) CAM16-UCS colourspaces \(J'a'b'\) array.

  • Jpapbp_2 – Sample / test Li et al. (2017) CAM16-UCS colourspaces \(J'a'b'\) array.

Returns

Colour difference \(\Delta E'\).

Return type

numpy.floating or numpy.ndarray

Warning

The \(J'a'b'\) array should have been computed with a Li et al. (2017) CAM16-LCD, CAM16-SCD, or CAM16-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

[LLW+17]