Multimodal Spatial Calibration for Accurately Registering EEG Sensor Positions

Table 1

Errors of 48 corners of 6 * 8 chessboard plate transform from one coordinate to another by using the calibration results. Unit of those errors is mm.

	Δ𝑋 (mm)	Δ𝑌 (mm)	Δ𝑍 (mm)	Δ𝑑 (mm)
1	−0.04	−0.90	−0.11	0.91
2	0.91	−0.79	−0.67	1.38
3	−0.21	−0.79	−0.14	0.83
4	0.57	0.08	−0.45	0.73
5	0.95	0.33	−0.87	1.33
6	0.70	0.28	−0.43	0.87
7	−0.86	−0.35	−0.92	1.31
8	0.45	−0.12	−0.85	0.97
9	−0.58	−0.74	−0.40	1.02
10	0.22	0.95	−0.47	1.08
11	0.50	0.52	0.24	0.76
12	0.50	0.30	−1.42	1.54
13	−0.06	−0.68	−0.84	1.08
14	−0.02	−0.43	−0.98	1.07
15	−0.68	−0.89	−0.47	1.21
16	0.50	−0.41	−0.03	0.65
17	0.98	0.33	−1.00	1.44
18	0.37	0.73	−0.41	0.92
19	−0.07	−0.56	−0.88	1.05
20	−0.97	−0.09	−0.66	1.18
21	−0.88	−0.18	−0.65	1.11
22	1.04	0.29	−1.15	1.58
23	0.04	0.35	0.68	0.77
24	0.57	0.86	0.87	1.35
25	−0.22	−0.18	0.37	0.47
26	−0.94	−0.98	−0.15	1.37
27	−0.04	0.83	0.45	0.94
28	0.69	0.77	0.93	1.39
29	0.30	0.71	0.60	0.98
30	0.88	0.66	0.36	1.16
31	−0.06	−0.18	0.59	0.62
32	−0.64	−0.27	0.38	0.79
33	−0.96	−0.63	0.45	1.23
34	−0.45	0.70	0.86	1.20
35	0.74	0.44	1.29	1.55
36	0.22	0.76	0.73	1.08
37	−0.71	−0.61	0.28	0.98
38	−0.18	−0.09	0.27	0.34
39	0.21	0.29	0.81	0.89
40	−0.56	0.97	0.11	1.13
41	0.16	0.41	0.25	0.51
42	1.59	0.09	0.26	1.61
43	−0.01	−0.42	0.90	0.99
44	−0.10	−1.75	0.53	1.83
45	−0.63	−0.05	0.90	1.10
46	−0.36	0.47	0.47	0.76
47	1.24	0.21	0.69	1.43
48	−0.11	0.74	0.68	1.01