Infrared image detail of Portrait of a Lady with a Music Book showing the line underdrawing of the book on the woman’s lap. InGaAs camera using 1500-1680nm filter (image: Shawn Digney-Peer)
Infrared image detail of Portrait of a Lady with a Music Book showing the line underdrawing of the book on the woman’s lap. InGaAs camera using 1500-1680nm filter (image: Shawn Digney-Peer)