Fig. 3
From: Beauty is skin deep: the skin tones of Vermeer’s Girl with a Pearl Earring
MA-XRF (0.4 mm/pixel) and RIS (0.17 mm/pixel) maps showing a contour around the face of the Girl. a Visible light image. René Gerritsen Art & Research Photography, b and corresponding black and white-inverted MA-XRF map of iron (performed in Photoshop). c Colour detail of the Girl’s face, area marked in a, and d corresponding false-colour first derivative RIS image showing the location of four regions with different reflectance spectra. e Reflectance spectra from the four regions identified in d