Research Article
Spectral Reflectance Recovery from Tristimulus Values under Multi-Illuminants
Table 1
Mean RMSE of the Munsell chips, ColorChecker SG, and Vrhel dataset under two illuminant combinations.
| ā | A | B | C | D50 | D55 | D65 | LED1 | LED2 |
| Munsell chips | A | 0.0218 | 0.0112 | 0.0113 | 0.0097 | 0.0096 | 0.0095 | 0.0140 | 0.0123 | B | 0.0112 | 0.0227 | 0.0115 | 0.0126 | 0.0134 | 0.0113 | 0.0123 | 0.0129 | C | 0.0113 | 0.0115 | 0.0232 | 0.0128 | 0.0136 | 0.0149 | 0.0121 | 0.0125 | D50 | 0.0097 | 0.0126 | 0.0128 | 0.0228 | 0.0102 | 0.0102 | 0.0119 | 0.0128 | D55 | 0.0096 | 0.0134 | 0.0136 | 0.0102 | 0.0230 | 0.0101 | 0.0116 | 0.0112 | D65 | 0.0095 | 0.0113 | 0.0149 | 0.0102 | 0.0101 | 0.0233 | 0.0113 | 0.0117 | LED1 | 0.0140 | 0.0123 | 0.0121 | 0.0119 | 0.0116 | 0.0113 | 0.0221 | 0.0107 | LED2 | 0.0123 | 0.0129 | 0.0125 | 0.0128 | 0.0112 | 0.0117 | 0.0107 | 0.0221 |
| ColorChecker SG | A | 0.0348 | 0.0188 | 0.0191 | 0.0175 | 0.0171 | 0.0165 | 0.0250 | 0.0178 | B | 0.0188 | 0.0369 | 0.0194 | 0.0213 | 0.0241 | 0.0228 | 0.0197 | 0.0211 | C | 0.0191 | 0.0194 | 0.0380 | 0.0228 | 0.0250 | 0.0267 | 0.0195 | 0.0206 | D50 | 0.0175 | 0.0213 | 0.0228 | 0.0370 | 0.0160 | 0.0159 | 0.0181 | 0.0208 | D55 | 0.0171 | 0.0241 | 0.0250 | 0.0160 | 0.0374 | 0.0158 | 0.0177 | 0.0195 | D65 | 0.0165 | 0.0228 | 0.0267 | 0.0159 | 0.0158 | 0.0380 | 0.0172 | 0.0182 | LED1 | 0.0250 | 0.0197 | 0.0195 | 0.0181 | 0.0177 | 0.0172 | 0.0355 | 0.0176 | LED2 | 0.0178 | 0.0211 | 0.0206 | 0.0208 | 0.0195 | 0.0182 | 0.0176 | 0.0356 |
| Vrhel dataset | A | 0.0398 | 0.0201 | 0.0207 | 0.0186 | 0.0179 | 0.0170 | 0.0293 | 0.0195 | B | 0.0201 | 0.0425 | 0.0215 | 0.0251 | 0.0264 | 0.0237 | 0.0251 | 0.0277 | C | 0.0207 | 0.0215 | 0.0439 | 0.0266 | 0.0287 | 0.0273 | 0.0244 | 0.0265 | D50 | 0.0186 | 0.0251 | 0.0266 | 0.0427 | 0.0175 | 0.0173 | 0.0235 | 0.0277 | D55 | 0.0179 | 0.0264 | 0.0287 | 0.0175 | 0.0432 | 0.0173 | 0.0226 | 0.0256 | D65 | 0.0170 | 0.0237 | 0.0273 | 0.0173 | 0.0173 | 0.0440 | 0.0217 | 0.0234 | LED1 | 0.0293 | 0.0251 | 0.0244 | 0.0235 | 0.0226 | 0.0217 | 0.0404 | 0.0196 | LED2 | 0.0195 | 0.0277 | 0.0265 | 0.0277 | 0.0256 | 0.0234 | 0.0196 | 0.0405 |
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