Table 1.

The mean NRMSE for the mean measured spectrum of each tile compared to its spectrometer spectrum of each quantitative and relative dataset, alongside the median pixel-by-pixel $\mathrm{\Delta }E$ value between the composite CIELAB reconstructions compared to the literature values. These datasets are balanced with the correct Spectralon reference, the Spectralon reference obtained at 35 cm, or the Spectralon reference obtained using an LED light source.

Distance (cm)	NRMSE for quantitative spectra (%)			$\mathrm{\Delta }E$			NRMSE for relative spectra (a.u.)
	Correct spectralon	Spectralon at 35 cm	Spectralon using LED	Correct Spectralon	Spectralon at 35 cm	Spectralon using LED	Correct Spectralon	Spectralon at 35 cm	Spectralon using LED
20	0.154	0.266	0.422	6.52	7.07	18.1	0.0491	0.0454	0.388
23	0.161	0.206	0.404	6.76	6.33	17.6	0.0537	0.0540	0.403
25	0.137	0.151	0.441	7.03	7.68	17.7	0.0465	0.0454	0.387
28	0.157	0.182	0.407	6.56	6.41	16.8	0.0522	0.0534	0.402
30	0.124	0.134	0.484	7.37	7.87	17.3	0.0387	0.0381	0.383
33	0.124	0.126	0.497	7.45	7.11	17.4	0.0383	0.0390	0.382
35	0.119	0.119	0.466	7.96	7.96	16.6	0.0336	0.0336	0.385