Real Fragments
As of August 2008 we have scanned 283 real fragments at Akrotiri
grouped into three test sets &emdash; red (134 fragments), white (105
fragments), and spiral (44 fragments). These fragments come from the
"spiral" wall painting, and were selected by the conservators for the
test. Each set contains a small number of known matches, but most
fragments do not match any others in the test set. The matches we
have found with out ribbon matcher (and which the conservators have
verified on the actual fragments) are shown below. The conservators
know of two matches which we have not found, however two of the three
white matches are "new," that is, the conservators were not aware of
these matches until we proposed them.
Test Fresco
The conservators have also prepared a test fresco for us, in the style
of the ancient frescoes. They applied an earthquake to this fresco,
then mailed it to us. Although these fragments are not as old as the
real ones, the large umber of matches helps us test whether we can
effectively reconstruct an entire fresco. This fresco is also shown
below, with all the matches than we found marked with a colored line.
The different colors indicate different parameters to the ribbon
matcher, which are fully described
in our
paper.
