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Heritage Science
Fig. 4 | Heritage Science

Fig. 4

From: Extracting chain lines and laid lines from digital images of medieval paper using spectral total variation decomposition

Fig. 4

Example of spectral TV decomposition of a reflected light image - patch taken from Cambridge University Library MS Ii.5.41, fol. 10r. a) the original image, b) high-pass filtered image containing only image noise, c) band-pass filtered image including the chain and laid lines of interest, d) low-pass filtered image displaying larger and high contrast structures such as the ink and dirt spot. Reproduced by kind permission of the Syndics of Cambridge University Library, MS Ii.5.41, fol. 10r. Full paper image is displayed in Fig. 6a)

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