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Table 3 Scan results of four 3D imaging systems for Girl with a Pearl Earring by Johannes Vermeer

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

 

MS-OCT

Std-Res 3D scan

High-Res 3D scan

3D digital microscopy

Scan results

Scanned areas

Complete painting in 4 quadrants

Complete painting

Complete painting

10 regions\(^{\mathrm{a}}\)

No. of tiles\({}^{\mathrm{b}}\)

All: \(41 \times 41 \times 4\)

All: \(4\times 8\)

All: \(8\times 15\)

Left eye: \(16 \times 23\)

Pearl Highlight: \(11 \times 20\)

Jacket: \(16 \times 26\)

Data size (per tile)\(^{\mathrm{c}}\)

Raw data

525 Mb

2.0 Gb

1.6 Gb

N/A\(^{\mathrm{d}}\)

Processed data

525 Mb

15.0 Gb\(^{\mathrm{e}}\)

11.4 Gb\(^{\mathrm{e}}\)

4 Mb

Data size equivalent (per m2)\({}^{\mathrm{f}}\)

Raw data

210 Gb

111 Gb

666 Gb

N/A\(^{\mathrm{d}}\)

Processed data

210 Gb

882 Gb\(^{\mathrm{e}}\)

4.75 Tb\(^{\mathrm{e}}\)

1.45 Tb

Imaging time

Capture time (per tile)

20 s

5 m 00 s

2 m 14 s

3 s

Processing time (per tile)

50 s (offline)

6 m 20 s (offline)

8 m 45 s (offline)

2.6 s (online)

  1. aThese regions are all comparable in size to sample regions depicted in Fig. 8b and c
  2. bFor the OCT scanning and 3D scanners, this denotes the number of tiles captured to scan the complete painting; for the 3D digital microscopy this denotes the number of tiles within the scan areas that were compared in the results section
  3. cNote that the tile sizes are very different between systems
  4. dThe individual images that constitute a focus stack are not saved, due to storage limitations
  5. eThis is the total data size per tile, including raw and processed image files (i.e. conversion of camera RAW format to TIFF)
  6. fThis excludes any overlap between tiles
  7. gThis includes the time needed for de-trending and stitching the tiles, which was integrated in the processing of the individual tiles