For example, crack inpainting may improve the legibility of the
text present in parts of the polyptych, which can be of great importance
to art-historical and iconographical studies. Virtual inpainting
of the book in the Virgin Annunciate panel was reported in [7]
on the scans from the Dierick collection. Here we identify some
limitations of state-of-the-art inpainting techniques for this type of
problem and introduce an improved method and report the
results on the new high-resolution scans from the data set in [31].