Colour Difference Formulae and Acceptability Limits
topic
CIE 2000 colour difference formula CIEDE2000 applies parametric weighting functions to CIELAB coordinate differences that correct for non-uniformities in perceptual colour space particularly in the blue and near-neutral regions, providing improved correlation with visual colour difference assessments compared to simple Euclidean delta-E ab for setting commercial textile colour tolerance limits.
Role
Enables the setting of numerically defined colour acceptability limits in CIELAB or CIEDE2000 units that correlate with the visual assessment judgments of trained colour assessors, reducing subjective colour approval decisions to objective instrumental measurement comparisons at commercially and technically meaningful colour difference threshold values.
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