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Article Dans Une Revue Applied optics Année : 2008

Multispectral camera and radiative transfer equation used to depict Leonardo's sfumato in Mona Lisa

Mady Elias
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Pascal Cotte
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Résumé

The technique used by Leonardo da Vinci to paint flesh tints—the sfumato—has never been scientifically depicted until now. From 100,000,000 reflectance spectra recorded on Mona Lisa, a virtual removal of the varnish is first obtained. A unique umber pigment is then identified in the upper layer and an exceptional maximum of the color saturation is underlined, both characteristics of a glaze technique. The modeling calling upon the radiative transfer equation confirms this maximum of saturation, the identification of an umber in the upper layer, and moreover underlines a mixture of 1% vermilion and 99% lead white in the base layer. Finally, the modeling, using the auxiliary function method, explains the spectacular maximum of saturation by the multiple scattering.
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Dates et versions

hal-00429942 , version 1 (05-11-2009)

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Mady Elias, Pascal Cotte. Multispectral camera and radiative transfer equation used to depict Leonardo's sfumato in Mona Lisa. Applied optics, 2008, 47 (12), pp.2146-2154. ⟨10.1364/AO.47.002146⟩. ⟨hal-00429942⟩
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