Analysing the Paper Texture in Van Dyck's Antwerp Sketchbook.

Digital image processing techniques have been implemented in order to determine whether the same type of paper was used in a number of folios from a sketchbook attributed to Van Dyck. Digital filtering on images of contact β-radiographs showed that all but one of the folios analysed exhibited a very similar pattern of horizontal lines, suggesting that the paper used derived from the same mould. [ABSTRACT FROM AUTHOR]