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Table 2 Colour coordinates of the sample points and analysis of errors between reconstruction and spectrophotometer reference data

From: Assessment of multispectral and hyperspectral imaging systems for digitisation of a Russian icon

  Red-robe Yellow-robe Green-shirt Blue-vest Brown-shadow Skin Gold
L* 37.34 54.21 51.53 37.13 21.24 61.67 33.50
a* 46.02 22.72 −22.68 −20.90 17.72 19.11 3.46
b* 16.21 51.21 20.92 −23.45 13.86 34.30 20.44
France
RMSE 0.0376 0.0108 0.0073 0.0108 0.0051 0.0151 0.0742
\(\Delta E_{ab}^{*}\) 4.53 4.79 3.13 3.63 2.12 3.12 14.91
Italy
RMSE 0.0457 0.0160 0.0077 0.0073 0.0068 0.0103 0.0238
\(\Delta E_{ab}^{*}\) 5.56 1.90 2.86 2.62 2.79 1.84 6.82
Poland
RMSE 0.0548 0.0142 0.0094 0.0059 0.0085 0.0213 0.0370
\(\Delta E_{ab}^{*}\) 5.88 3.59 3.60 1.51 6.33 2.19 7.71
UK
RMSE 0.0236 0.0110 0.0109 0.0154 0.0068 0.0185 0.0287
\(\Delta E_{ab}^{*}\) 11.05 0.98 4.64 4.13 1.93 2.92 7.41