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Revisiting the weighting function for lightness in the CIEDE 2000 colour‐difference formula
Author(s) -
Melgosa Manuel,
Cui Guihua,
Oleari Claudio,
Pardo Pedro J.,
Huang Min,
Li Changjun,
Luo Ming Ronnier
Publication year - 2017
Publication title -
coloration technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 1472-3581
DOI - 10.1111/cote.12294
Subject(s) - lightness , weighting , mathematics , colour difference , color difference , function (biology) , significant difference , statistics , artificial intelligence , computer science , optics , physics , evolutionary biology , acoustics , biology , enhanced data rates for gsm evolution
We have used 13 experimental datasets (7420 colour pairs) to study the performance of the weighting function for lightness proposed by the CIEDE 2000 colour‐difference formula, because it has been suggested that this function can be improved by using the weighting function for lightness S L = 1 adopted by the CIE 94 colour‐difference formula. Using the standardised residual sum of squares ( STRESS ) index, it was found that: (i) replacing the S L in CIEDE 2000 with S L = 1 improved the results for 7/13 datasets considered, but the improvement was statistically significant only for 1/13 datasets; (ii) a Whittle‐type lightness‐difference formula can be used to replace the term ∆ L */ S L in CIEDE 2000, which led to a new colour‐difference formula with no statistically significant difference with respect to CIEDE 2000 for any of the 13 experimental datasets. A modification of the CIEDE 2000 formula using a Whittle‐type lightness formula is proposed.