Joint data treatment for Vis–NIR reflectance imaging spectroscopy and XRF imaging acquired in the Theban Necropolis in Egypt by data fusion and t-SNE

Publication date: Available online 10 September 2018Source: Comptes Rendus PhysiqueAuthor(s): Matthias Alfeld, Silvia Pedetti, Philippe Martinez, Philippe WalterAbstractHyperspectral imaging allows the acquisition of representative information on cultural heritage objects. For a complete identification of the chemical compounds present, one needs instruments employing different forms of radiation, sensitive to different chemical features. Data treatment workflows are commonly developed for a single spectroscopic technique, so that data sets are evaluated separately, and the reduced representations yielded are compared during interpretation. In this publication, we describe how t-stochastic neighbor embedding (t-SNE) allows for the evaluation and interpretation of data acquired in a Ramesside tomb (13th century BC) of the Theban Necropolis in Egypt. By fusing X-ray Fluorescence (XRF) imaging and Reflectance Imaging Spectroscopy (RIS) into a single data set, we exploit the synergies between both methods to support interpretation and presentation of the results yielded.RésuméL'imagerie hyperspectrale permet l'acquisition d'informations représentatives sur les objets du patrimoine culturel. Pour une identification complète des composés chimiques présents, il faut des instruments employant différentes formes de rayonnement, sensibles à différentes caractéristiques chimiques. Les procédures pour évaluer les données sont généralement développées pour une seule techn...
Source: Comptes Rendus Physique - Category: Physics Source Type: research