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