Multispectral documentation and image processing analysis of the papyrus of tomb II at Daphne

dc.contributor.author	Αλεξοπούλου - Αγοράνου, Αθηνά	el
dc.contributor.author	Καμινάρη, Αγαθή-Ανθούλα	el
dc.contributor.author	Παναγόπουλος, Αθανάσιος	el
dc.contributor.author	Pöhlmann, Egert	en
dc.date.accessioned	2015-01-22T10:46:26Z
dc.date.available	2015-01-22T10:46:26Z
dc.date.issued	2015-01-22
dc.identifier.uri	http://hdl.handle.net/11400/4526
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/us/	*
dc.source	http://www.sciencedirect.com/science/article/pii/S0305440312004153	en
dc.subject	Image processing
dc.subject	Principal component analysis
dc.subject	Αρχικό στοιχείο ανάλυσης
dc.subject	Multispectral imaging
dc.subject	Papyrus
dc.subject	Near infrared
dc.subject	False colour infrared
dc.subject	Πολυφασματική απεικόνιση
dc.subject	Πάπυρος
dc.subject	Επεξεργασία εικόνας
dc.subject	Εγγύς υπέρυθρη ακτινοβολία
dc.title	Multispectral documentation and image processing analysis of the papyrus of tomb II at Daphne	en
dc.title.alternative	Greece	en
heal.type	journalArticle
heal.classification	Archaeology
heal.classification	Art museums
heal.classification	Αρχαιολογία
heal.classification	Τέχνη Μουσεία και πινακοθήκες
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh85006507
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh2002000803
heal.classificationURI	N/A-Αρχαιολογία
heal.classificationURI	N/A-Τέχνη Μουσεία και πινακοθήκες
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh85064446
heal.keywordURI	http://lod.nal.usda.gov/59637
heal.identifier.secondary	10.1016/j.jas.2012.09.013
heal.language	en
heal.access	campus
heal.recordProvider	Σχολή Καλλιτεχνικών Σπουδών. Τμήμα Συντήρησης Αρχαιοτήτων και Έργων Τέχνης.	el
heal.publicationDate	2012-09-09
heal.bibliographicCitation	Alexopoulou, A-A., Kaminari, A-A., Panagopoulos, A., & Polman, E., (2013) Multispectral documentation and image processing analysis of the papyrus of Tomb II at Daphne, Greece. "Journal of Archaeological Science". 40 (2). p.1242-1249.	el
heal.abstract	This paper refers to the study of an ancient papyrus, dated ca. 420/430 BC, found in 1981 during an excavation at Daphne, Athens, Greece, using multispectral imaging combined with image processing analysis. It was assumed that the papyrus contained ancient Greek musical notation but the condition of the object hindered the drawing of any conclusion based only on visual examination. This fact, combined with the significance of the object itself, as it is the oldest papyrus which carries Greek text, pointed to the application of non-invasive techniques to enhance its readability. The multispectral imaging carried out in the range of 420e1000 nm enabled the detection of more letters on surface layers, at various places and orientations. False colour imaging proved to yield better results in distinguishing the letters compared to single wavelength recording. In some cases, letters from several layers underneath are revealed in the infrared. The letters present different greylevels according to the layer they belong. An interesting result coming from a simple subtraction of the infrared image at 1000 nm from the visible one at 660 nm is that different layers of the papyrus can be distinguished. The Application of Principal Component Analysis (PCA) showed that the best results, as far as the extraction of the letters from the background is concerned, are obtained when the second and the third images are merged. The automatic extraction of the letters is feasible to some extent but there is a certain amount of noise with similar characteristics that cannot be removed.	en
heal.journalName	Journal of Archaeological Science	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true
heal.dateCreated	2012-06-06