Table 2. Colorimetric properties of samples as chromaticity areas: Chromaticity coordinates corresponding to reflectance spectra measured for each sample constituting the colour pair samples used for the experiment (third column) and chromaticity areas for the spectra reconstructed with an RGB (fourth column) and a hyperspectral camera (fifth column).
| Pair | Sample | Chromaticity | RGB camera CA | Hyperspectral camera CA | ||
|---|---|---|---|---|---|---|
| x | y | radiance | reflectance | |||
| I | H7 | 0.392 | 0.361 | 5.06 × 10−4 | 1.15 × 10−6 | 2.90 × 10−6 |
| H8 | 0.386 | 0.355 | 5.44 × 10−4 | 1.53 × 10−6 | 3.51 × 10−6 | |
| II | M7 | 0.461 | 0.479 | 2.62 × 10−4 | 1.05 × 10−6 | 2.22 × 10−6 |
| H4 | 0.457 | 0.474 | 1.89 × 10−4 | 1.73 × 10−5 | 1.21 × 10−5 | |
| III | C5 | 0.232 | 0.264 | 2.19 × 10−4 | 1.26 × 10−6 | 2.96 × 10−6 |
| B6 | 0.226 | 0.285 | 1.90 × 10−4 | 2.60 × 10−6 | 4.28 × 10−6 | |
| IV | C3 | 0.257 | 0.211 | 4.01 × 10−4 | 1.24 × 10−6 | 3.23 × 10−6 |
| I2 | 0.275 | 0.253 | 2.14 × 10−4 | 1.04 × 10−5 | 1.77 × 10−5 | |
| V | C9 | 0.297 | 0.427 | 2.80 × 10−3 | 8.63 × 10−6 | 1.17 × 10−5 |
| G9 | 0.347 | 0.471 | 9.28 × 10−4 | 2.80 × 10−6 | 1.87 × 10−6 | |
| VI | G3 | 0.484 | 0.323 | 2.58 × 10−3 | 2.22 × 10−6 | 4.79 × 10−6 |
| M2 | 0.462 | 0.274 | 4.15 × 10−4 | 2.34 × 10−5 | 2.08 × 10−5 | |
| VII | B3 | 0.322 | 0.268 | 1.24 × 10−4 | 1.89 × 10−6 | 2.90 × 10−6 |
| L4 | 0.395 | 0.309 | 3.50 × 10−4 | 1.03 × 10−5 | 1.81 × 10−5 | |
| Average chormaticity area Chromaticity area standard error | 6.95 × 10−4±6.23 × 10−5 | 6.13 × 10−6±5.03 × 10−7 | 9.00 × 10−6±5.13 × 10−7 | |||
Chromaticity values were calculated from tristimulus values calculated from Eq (1) using the CIE 1931 colour matching functions.