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A colour-difference formula for assessing large colour differences

✍ Scribed by Shing–Sheng Guan; M. Ronnier Luo

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
259 KB
Volume
24
Category
Article
ISSN
0361-2317

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✦ Synopsis

An experiment was carried out to study large colour differences. Two-hundred-and-ninety-two wool pairs were prepared with an average difference of 12 CIELAB ⌬E units. Visual assessments were conducted using gray scale and pair comparison psychophysical methods by a panel of 20 observers. The results from the two psychophysical methods were used to test colour-difference formulae and compare their differences. The gray scale results were also used to compare with the other large colour-difference data sets, i.e., BFB, OSA, and WW. The present results together with part of the other data sets were combined to form a single data set. A modified CIELAB colour-difference formula was developed having a structure similar to that of CIE94. It is named the GLAB colour-difference formula.

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