Oldal 43 [43]
UV-induced visible luminescence images
a
Camera output Corrected for Corrected Corrected for Corrected for
spatial for camera ambient stray “pigment¬
inhomogeneities response light binder”
of light source (colour interaction
(Flat fielding) calibration)
» Camera output file — UV-induced visible luminescence image
» ICC profile for conversion from RAW (contained within the image file)
- Image of uniform reflective board under experimental conditions for flat fielding
- Image of Spectralon diffuse reflectance grey scale or any number of Spectralon diffuse reflectance
standards as available (included as part of the image to be calibrated or another image taken with the
same camera and lighting conditions)
Additional requirements from other workflows:
- Calibrated visible-reflected image (including a Spectralon diffuse reflectance grey scale or any number
of Spectralon diffuse reflectance standards as available)
» Corrected UV-reflected image (including a Spectralon diffuse reflectance grey scale or any number of
Spectralon diffuse reflectance standards as available)
All must be taken under identical illumination conditions and geometry
Figure 1-27. Workflow and post-processing requirements for UV-induced visible luminescence images - Wall painting fragment from the British Museum
(Winged youth from the Tomb of the Nasonii, 1883,0505.5).