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Heritage Science
Fig. 5 | Heritage Science

Fig. 5

From: Identification and mapping of ancient pigments in a Roman Egyptian funerary portrait by application of reflectance and luminescence imaging spectroscopy

Fig. 5

a Endmembers used for linear unmixing. EM 2, corresponding to Egyptian blue, was corrected to remove the stray light background. b Emission mapped in the portrait using the background fluorescence endmember. c Madder lake abundance map produced from the linear unmixing of EM 1. d Egyptian blue abundance map produced from the linear unmixing of corrected EM 2

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