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Heritage Science
Fig. 5 | Heritage Science

Fig. 5

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

Fig. 5

Chain line extraction pipeline: a original colour image with patch marked; b grayscale patch; c spectral TV band-pass filtered image; d Fourier filtered image; e plot of d projected onto x-axis, orange crosses mark the peaks and the grey dotted line represents the threshold; f original image with detected chain lines. Original image courtesy of The Parker Library, Cambridge, Corpus Christi College, MS 81: Homer, Iliad, Odyssey. Quintus of Smyrna, Posthomerica, p. 9

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