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Discussion

The CIE 2006 physiologically relevant observer differs from the 1931 observer by

  • A.abandoning the concept of tristimulus values entirely
  • B.applying only to those observers with a colour vision deficiency
  • C.being built on cone fundamentals with age and field size parameters
  • D.using a smaller field size than two degrees

Answer: C

It allows the observer to be specified by age and field size rather than fixed. Adoption in industry has been slow because of the weight of existing data on the older system. Age and field size become explicit parameters.

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