Fig. 8From: Extracting chain lines and laid lines from digital images of medieval paper using spectral total variation decompositionExample for a a synthetic image showing three lines at different angles of 45\(^{\circ }\) (top left), 90\(^{\circ }\) (bottom) and 165\(^{\circ }\) (top right). and b the corresponding Radon transform displaying a peak at the 45\(^{\circ }\), the 90\(^{\circ }\) and the 165\(^{\circ }\) angleBack to article page