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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