Table 1.
Colorimetric values on three selected spots (average of 5 × 5 pixel, spectral acquisition sampled by 2) calculated from the spectra extracted by the cube-files acquired before (L*b, a*b, b*b) and after (L*a, a*a, b*a) the restoration process. CIE standard 2° observer and D65 illuminant, CIEDE2000 color-difference formula [57].
| Spot | L*b | L*a | ∆L* | a*b | a*a | ∆a* | b*b | b*a | ∆b* | ∆E00 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 27.26 | 28.05 | 0.79 | 2.91 | 4.17 | 1.26 | 6.14 | 1.99 | −4.15 | 4.24 |
| 2 | 32.62 | 35.06 | 2.44 | 27.82 | 34.97 | 7.15 | 20.66 | 29.20 | 8.54 | 4.64 |
| 3 | 23.65 | 42.94 | 19.29 | 8.89 | 14.33 | 5.44 | 9.56 | 31.65 | 22.09 | 19.58 |
Coordinates of the spots in the image: (1) x = 250, y = 239; (2) x = 280, y = 310; (3) x = 340, y = 415.