Comparison of Hyperspectral Imaging and Fiber-Optic Reflectance Spectroscopy for Reflectance and Transmittance Measurements of Colored Glass

The work presented in this paper is part of a wider research project, which aims at documenting and analyzing stained glass windows by means hyperspectral imaging. This technique shares some similarities with UV-VIS-IR spectroscopy, as they both provide spectral information; however, imaging has the additional advantage providing spatial information, since spectrum can be collected each pixel image. Compared to rarely been used for investigation windows. One objectives is, thus, compare performance these two instruments validate results second objective evaluate potential colored-glass pieces reflectance modality those obtained transmittance, order highlight differences between approaches. geometry systems backing material glass, well characteristics pieces, are discussed. L*a*b* values from spectra, calculated color difference ΔE00, provided, show degree agreement measurement modalities.