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Figure 2
X-ray radiograph of a thin section of the painting taken at ID21 at the sulfur K-edge (2.46 keV). Arrows represent the position of SIFT keypoints, those corresponding to the sample in red and those from artifacts and from the matrix in blue.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
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