Hypercolorimetric multispectral imaging system for cultural heritage diagnostics: an innovative study for copper painting examinationC. Colantonio, C. Pelosi, L. D’Alessandro, S. Sottile, G. Calabrò and M. MelisEur. Phys. J. Plus, 133 12 (2018) 526DOI: https://doi.org/10.1140/epjp/i2018-12370-9