Fig. 3From: Hyperspectral imaging solutions for the non-invasive detection and automated mapping of copper trihydroxychlorides in ancient bronzeTop: Cluster maps associated with clusters A, B and C of the two selected fragments (YJS-M109-19, SJL-M102-8) of ancient Chinese bronze, imaged using the SWIR hyperspectral imaging system. Bottom: SWIR Mean spectra for clusters A, B and C (solid black), with additional spectra plotted for reference (green, blue)Back to article page