Stranica 42 [42]
CHARISM A I 7
suggested by the UV-reflected image Figure 1-26 (d)), which shows the UV radiation fully
absorbed by this varnish layer, particularly over the figure. The information on luminescence
therefore relates strictly to the varnish layer and the colours present on the figure are due to
apparent emissions, which have been removed on correction.
Although the above method has been proposed and tested for UV-induced visible
luminescence images, it is envisaged that it can also be applied to visible-induced infrared
luminescence and visible-induced visible luminescence images, although post-processing
methods for the latter are outside the scope of this work. The procedure will be integrated
into a workflow for the development of the post-processing software addressing the
correction of luminescence images (see Chapter 3).
— Summary
Figure 1-27 and Figure 1-28 summarise the workflows which will be used in the development
of the post-processing software, based on the correction requirements discussed in this
section. They highlight the transformations which must be carried out for each image set and
also record the requirements in terms of images or files which will be necessary for the post¬
processing software to carry out the image correction procedure. They address the
correction of UV-induced visible luminescence images and visible-induced infrared
luminescence images, respectively. It is envisaged that a workflow based on that for UV¬
induced visible luminescence images could be adapted for use for the correction of visible¬
induced visible luminescence images but this is beyond the scope of this work. The
development and operation of the software will be discussed further in Chapter 3.
Version No. 1.0 34 Date : 14/10/2013