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Local Criterion of Quality for Color Difference Formula
"... It is important to be equipped with criterion of correspondence between color difference formula and experimental data of color discrimination of standard observer considering a quality of color printing or measuring. Such criterion is used to distinguish whether applied color difference formula is ..."
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description, so we discuss several metrics based on distance definition traditional for vector algebra. To evaluate metric quality we use criteria of local non-uniformity based on Wyszecki & Fielder experiments. The shape of Wyszecki & Fielder ellipsoids can serve as a criterion of the chosen metric
