Fig. 4From: Developing a systematic approach to determine the sequence of impressions of Japanese woodblock prints: the case of Hokusai’s ‘Red Fuji’Comparison of the wood-grain patterns inside Mount Fuji: ‘Pink Fuji’ (left) and ‘Red Fuji’ (right). a Photographs. b Greyscale images enhanced using Adobe Photoshop software allowing a better visualisation of the wood-grain pattern (length of image: 12 cm)Back to article page