Table 4 Comparison of reference target measurements, sample no. 513E by Rubert & Co [41], as depicted in Fig. 6

From: Comparison of three 3D scanning techniques for paintings, as applied to Vermeer’s ‘Girl with a Pearl Earring’

Groove

Exp. depth

NPS

MS-OCT

Std-Res 3D scan

\(\Delta\) (\(\upmu \hbox {m}\))

N

\(\sigma\) (\(\upmu \hbox {m}\))

\(\Delta\) (\(\upmu \hbox {m}\))

Err. (\(\upmu \hbox {m}\))

N

\(\sigma\) (\(\upmu \hbox {m}\))

\(\Delta\) (\(\upmu \hbox {m}\))

Err. (\(\upmu \hbox {m}\))

N

\(\sigma\) (\(\upmu \hbox {m}\))

1 (t)

1000

1220

0.22

984

N/A

250

7.4

982

\(-\)2

22.5k

15.0

1 (b)

20

0.05

250

6.2

150

9.2

2 (t)

500

1050

0.42

496

N/A

400

5.8

490

\(-\)6

10.5k

10.2

2 (b)

10

0.12

300

1.6

2400

17.7

3 (t)

200

910

0.21

195

N/A

990

4.5

194

\(-\)1

12k

10.3

3 (b)

200

0.08

550

1.4

7500

9.3

4 (t)

30

1100

0.21

29

N/A

600

3.0

29

0

4500

10.8

4 (b)

10

0.05

400

4.1

750

10.4

Groove

Exp. depth

Std-Res 3D scan

High-Res 3D scan

3D digital microscopy

\(\Delta\) (\(\upmu \hbox {m}\))

\(\Delta\) (\(\upmu \hbox {m}\))

Err. (\(\upmu \hbox {m}\))

N

\(\sigma\) (\(\upmu \hbox {m}\))

\(\Delta\) (\(\upmu \hbox {m}\))

Err. (\(\upmu \hbox {m}\))

N

\(\sigma\) (\(\upmu \hbox {m}\))

\(\Delta\) (\(\upmu \hbox {m}\))

Err. (\(\upmu \hbox {m}\))

1 (t)

1000

972

− 12

7000

12.9

987

3

340k

3.5

987

3

1 (b)

2250

8.6

240k

3.1

2 (t)

500

520

24

7750

12.2

496

0

348k

2.5

496

0

2 (b)

1000

7.2

228k

3.8

3 (t)

200

206

11

2250

8.6

206

11

560k

3.2

194

− 1

3 (b)

7000

8.3

456k

3.4

4 (t)

30

37

8

6250

10.1

35

6

125k

6.3

31

2

4 (b)

1050

10.3

155k

5.2

  1. The Nano Point Scanner (NPS) measurements are taken as the gold standard. The grooves are labeled from the deepest (1) to most shallow (4) groove, where (t) denotes the measurement at the sample’s top surface and (b) the measurement at bottom of the groove. For every measurement region, N denotes the number of measurements, \(\sigma\) the standard deviation of those measurements, \(\Delta\) the height difference between the top and bottom (mean difference), and Err. the error with respect to the NPS measurement. Except N all the results are specified in \(\upmu \hbox {m}\). The errors (relative to the NPS measurements) are plotted is Fig. 7
Back to article page