Table 8.

Reference measurement results and point cloud sizes, where s is the mean distance to nearest point for reference blocks separately and together, $\sigma$ is standard deviation, and n the number of points. Nikon: high-resolution photogrammetry; GH: industrial camera photogrammetry; TLS: terrestrial laser scanning; Leo: Artec Leo; FF: Faro Freestyle.

	Nikon	GH	TLS	Leo	FF
n	934,097	1,087,748	50,585	4480	8183
$s_1$ (mm)	0.34	0.25	0.43	0.30	1.22
$s_2$ (mm)	0.39	0.15	0.41	0.18	0.98
$s_3$ (mm)	0.15	0.18	0.41	0.20	0.65
$s_4$ (mm)	0.13	0.15	0.35	0.15	0.49
$s_5$ (mm)	0.20	0.20	0.37	0.20	0.49
${\sigma }_1$ (mm)	0.24	0.19	0.31	0.21	0.74
${\sigma }_2$ (mm)	0.26	0.11	0.35	0.13	0.54
${\sigma }_3$ (mm)	0.10	0.14	0.31	0.14	0.46
${\sigma }_4$ (mm)	0.06	0.08	0.29	0.08	0.38
${\sigma }_5$ (mm)	0.08	0.07	0.22	0.10	0.33
$s_{mean}$ (mm)	0.24	0.19	0.40	0.20	0.77
${\sigma }_{mean}$ (mm)	0.15	0.12	0.30	0.13	0.48