Multi-sensor Imaging Approach to Highlight Hidden Pentimenti and Underdrawings: The Case of “the Spring” Painting at Chigi Palace of Ariccia
摘要
The study of paintings using a multi-sensor approach allows obtaining information on details not visible to the naked eye, such as pentimenti and preparatory drawings. The possibility to concatenate multispectral images, coming from different devices and spectral ranges (from visible to short-wave infrared), allows the creation of hypercube data that can be analysed with chemometric approaches, such as Principal Components Analyses (PCA). Moreover, the use of X-Ray radiation performing radiographic images allows us to reach the inner layers and to detect details of the paintings that are not accessible using optical radiations. In this work, “The Spring” painting, realised by Mario de’ Fiori e Filippo Lauri, was analysed by using a multi-sensor approach: a full spectrum Nikon camera, an InGaAs camera and an Image Plate detector for X-rays to recover hidden details of the artists’ creative process.