A white light
is shined on the artwork. A number of separate
images, one for each spectral band, are acquired
with a scientific calibrated CCD camera and a
set of interferential filters.
In this way for
each image it is possible to quantify the amount
of radiation received. The images can then be
used to evaluate the amount of reflection or emission
present in each band for each pixel.
The multispectral images can then be recombined
into an RGB image, which will show a much more
faithful reproduction of what is perceived with a
direct observation, since with this method it is
possible to approximate the tristimulus curves
in a more accurate way, compared with what is
done in the standard RGB cameras.
The acquired data can then be processed and allow for a better identification of matrials
Particolare della Madonna col Bambino,
pannello del Polittico di Santa Caterina
di Simone Martini.
Immagini multispettrali in fluorescenza
UV acquisite tramite CCD e filtri interferenziali
a banda media.
Ricostruzione
dell'immagine a colori in fluorescenza UV
e nel visibile
