Technical

 Colour fidelity & geometry  precision.

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Aims

  • Measurement of colour fidelity and colour resolution of devices
  • Determination of true effective pixel size
  • Detection of image distortions

Material

IT8.7/1 Colour Target mounted on glas slide

  • 264 colour & 24 grey value fields
  • known absorption spectra and colourimetric coordinates

Grid pattern glas slide

  • overall size: 1" x 3" (25mm x 75mm)
  • image area: 20mm x 50mm
  • clear aperture: 8.5 µm²
  • opaque lines: 1.5 µm²
  • pitch: 10 µm

General Conditions

  • All participants had to scan the same slides
  • Any manual interaction was allowed
  • Rescan of slides was allowed
  • 1h time limit

Evaluation

Colour difference calculation to CIEDE2000 

  • average inside middle 50% of each field
  • low-resolution scan


Measurements inside whole slide images

  • Inside sensor field (no stitching)
  • 9 sensor fields – 18 measurements each