A non-invasive extensive method for the inspection of painted layers which is able to recognise alterations long before a trained eye is particularly useful in monitoring the state of conservation of modern works of art. Multi-wavelength imaging may be applied so as to detect progressive alterations of contemporary art materials, measuring the reflectance spectra of the painting layers. The measurements may be performed by digital imaging, as they have been applied successfully for painting material recognition of ancient masterpieces. A sequence of images of the painting is acquired and digitised in narrow spectral bands, from the Visible to the near-IR. The reflectance spectrum of any detail is derived from the image sequence by a calibration procedure and suitable software. The same measurement is repeated, on the same painting, after a certain lapse of time. The spectra obtained in succession are compared using multivariate analysis to detect any systematic deviation. Trends of colour alteration can thus be singled out for further investigation and/or conservation issues.
Image spectroscopy for diagnostics and conservation of contemporary art
PETRUCCI, Ferruccio Carlo
2004
Abstract
A non-invasive extensive method for the inspection of painted layers which is able to recognise alterations long before a trained eye is particularly useful in monitoring the state of conservation of modern works of art. Multi-wavelength imaging may be applied so as to detect progressive alterations of contemporary art materials, measuring the reflectance spectra of the painting layers. The measurements may be performed by digital imaging, as they have been applied successfully for painting material recognition of ancient masterpieces. A sequence of images of the painting is acquired and digitised in narrow spectral bands, from the Visible to the near-IR. The reflectance spectrum of any detail is derived from the image sequence by a calibration procedure and suitable software. The same measurement is repeated, on the same painting, after a certain lapse of time. The spectra obtained in succession are compared using multivariate analysis to detect any systematic deviation. Trends of colour alteration can thus be singled out for further investigation and/or conservation issues.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
