Table 1. Bland-Altman analysis of the agreement between spectra measured using multispectral images of a static colour checker card, and images of a moving card aligned using the 3D reconstruction and tracking algorithm.

	Panel No.
	1	2	3	4	5	6	7	8	9
Average Difference	0.0218	0.0609	0.0018	0.0489	0.0066	0.1437	0.0387	0.0692	0.0125
σ	0.1552	0.1334	0.0962	0.1184	0.0856	0.1225	0.1102	0.0847	0.0438
L.O.A. (±)	0.3042	0.2614	0.1885	0.2321	0.1677	0.2400	0.2160	0.1661	0.0859

The average absolute difference between the normalised reflected intensity across all wavelengths is presented, along with the standard deviation of the differences (σ) and the limits of agreement (L.O.A.), which are defined as ±1.96 × σ and represent the range in which 95% of the differences are found.