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The CIE 1976 u prime v prime diagram improves on xy by

  • A.reducing the number of coordinates required to one
  • B.making the spacing more nearly perceptually uniform
  • C.extending the gamut to include imaginary colours
  • D.removing the need to specify an illuminant

Answer: B

It is a projective transformation of the xy diagram rather than a new measurement. Uniformity is much improved but remains far from perfect. It is a projection rather than new measurement. No new experimental data was required.

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