Panoramic, Macro and Micro Multispectral Imaging: An Affordable System for Mapping Pigments on Artworks

Antonino Cosentino

41 citations0/0 files storedJournal of Conservation and Museum Studies

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Cultural Heritage Materials Analysis Spectroscopy and Chemometric Analyses Color Science and Applications

Abstract

Multispectral imaging systems are used in art examinations to map and identify pigments, binders and areas of retouching. A monochromatic camera is combined with an appropriate wavelength selection system and acquires a variable number of spectral images of a scene. These images are then stacked into a reflectance imaging cube to reconstruct reflectance spectra from each of the images’ pixels. This paper presents an affordable multispectral imaging system composed of a monochromatic CCD camera and a set of only 12 interference filters for mapping pigments on works of art and for the tentative identification of such pigments. This work demonstrates the versatility of this set-up, a versatility enabling it to be applied to different tasks, involving examination and documentation of objects of varying size. Use of this multispectral camera for both panoramic and macro photography is discussed, together with the possibilities facilitated from the coupling of the system to a stereomicroscope and a compound microscope. This system is of particular interest for the cultural heritage sector because of its hardware simplicity and acquisition speed, as well as its lightness and small dimensions.

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References

1960Dizionario biografico degli italiani 2011Advances in multispectral and hyperspectral imaging for archaeology and art conservation 2014Identification of pigments by multispectral imaging; a flowchart method 2010Visible and Infrared Imaging Spectroscopy of Picasso's Harlequin Musician: Mapping and Identification of Artist Materials in Situ 2008Multispectral imaging of paintings 2014Use of imaging spectroscopy, fiber optic reflectance spectroscopy, and X-ray fluorescence to map and identify pigments in illuminated manuscripts 2001Laser induced breakdown spectroscopy and hyper-spectral imaging analysis of pigments on an illuminated manuscript 2013Mapping of egg yolk and animal skin glue paint binders in Early Renaissance paintings using near infrared reflectance imaging spectroscopy

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2018Hypercolorimetric multispectral imaging system for cultural heritage diagnostics: an innovative study for copper painting examination 2016Transmittance spectroscopy and transmitted multispectral imaging to map covered paints 2022Virtual reconstruction of the painting process and original colors of a color-changed Northern Wei Dynasty mural in Cave 254 of the Mogao Grottoes 2023

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