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.
Citation
ID:
246338
Ref Key:
cosentino2015journalpanoramic,