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Table 3 Triangulation error analysis—SURF

From: Multi-view 3D skin feature recognition and localization for patient tracking in spinal surgery applications

 

SURF

Patient no.

1

2

3

4

5

6

7

8

TOT

Analyzed regions

1

1

1

7

11

3

7

3

ALL

Area [\(\hbox {cm}^2\)]

45.2

18.9

29.1

145.5

157.4

48.0

49.8

20.7

514.7

Number of features

130

78

42

577

457

83

299

61

1727

Mean [mm]

0.184

0.148

0.126

0.199

0.268

0.172

0.160

0.195

0.204

Std deviation [mm]

0.113

0.091

0.103

0.125

0.148

0.110

0.120

0.117

0.134

Features/\(\hbox {cm}^2\)

2.9

4.1

1.4

4.0

2.9

1.7

6.0

2.9

3.4

Rms [mm]

0.216

0.174

0.163

0.235

0.306

0.204

0.200

0.228

0.244

Min [m]

1.644

1.944

1.235

0.658

1.782

1.153

0.075

2.542

0.075

Quartile 1 [mm]

0.091

0.066

0.037

0.102

0.151

0.073

0.060

0.109

0.090

Median [mm]

0.193

0.150

0.121

0.194

0.272

0.178

0.140

0.174

0.195

Quartile 3 [mm]

0.270

0.219

0.185

0.286

0.376

0.245

0.237

0.265

0.300

Max [mm]

0.427

0.340

0.399

0.543

0.620

0.433

0.575

0.486

0.620