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CIEDE2000 differs from CIE94 principally in adding

  • A.a rotation term and a lightness weighting correction
  • B.a term for the ultraviolet content of the illuminant
  • C.a dependence on the chemical nature of the colourant
  • D.a requirement to use the ten degree observer only

Answer: A

The rotation term corrects the tilted difference ellipses observed in the blue region. A revised lightness weighting and a chroma scaling for near neutral colours were also added. The rotation term is the most distinctive feature.

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