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Match each reference condition for CIEDE2000 with its specification.
List I
A. Illumination
B. Observer
C. Background
D. Sample separation
List II
1. uniform neutral grey of L star fifty
2. D65 simulator at about 1000 lux
3. abutting with no visible gap between
4. normal colour vision, ten degree field

  • A.A-2, B-4, C-1, D-3
  • B.A-4, B-2, C-1, D-3
  • C.A-2, B-4, C-3, D-1
  • D.A-3, B-1, C-4, D-2

Answer: A

Departures from these conditions are handled by the parametric factors. Quoting a value without noting the conditions omits part of the specification. Conditions belong with the number reported. Reference conditions were assumed in the fitting.

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