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.

		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