class colour.CorrespondingColourDataset[source]

Defines a corresponding colour dataset.

  • name (unicode) – Corresponding colour dataset name.
  • XYZ_r (array_like) – CIE XYZ tristimulus values of the reference illuminant.
  • XYZ_t (array_like) – CIE XYZ tristimulus values of the test illuminant.
  • XYZ_cr (array_like) – Corresponding CIE XYZ tristimulus values under the reference illuminant.
  • XYZ_ct (array_like) – Corresponding CIE XYZ tristimulus values under the test illuminant.
  • Y_r (numeric) – Reference white luminance \(Y_r\) in \(cd/m^2\).
  • Y_t (numeric) – Test white luminance \(Y_t\) in \(cd/m^2\).
  • B_r (numeric) – Luminance factor \(B_r\) of reference achromatic background as percentage.
  • B_t (numeric) – Luminance factor \(B_t\) of test achromatic background as percentage.
  • metadata (dict) – Dataset metadata.


  • This class is compatible with Luo and Rhodes (1999) Corresponding-Colour Datasets datasets.



Create new instance of CorrespondingColourDataset(name, XYZ_r, XYZ_t, XYZ_cr, XYZ_ct, Y_r, Y_t, B_r, B_t, metadata)


Initialize self. See help(type(self)) for accurate signature.


__init__ Initialize self.
index(value, [start, [stop]]) Raises ValueError if the value is not present.


B_r Alias for field number 7
B_t Alias for field number 8
XYZ_cr Alias for field number 3
XYZ_ct Alias for field number 4
XYZ_r Alias for field number 1
XYZ_t Alias for field number 2
Y_r Alias for field number 5
Y_t Alias for field number 6
metadata Alias for field number 9
name Alias for field number 0