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Spectral mixture analysis (also called spectral unmixing) has been an alluring exploitation goal since the earliest days of imaging spectroscopy. No matter the spatial resolution, the spectral signatures collected in natural environments are invariably a mixture of the signatures of the various materials found within the spatial extent of the ground instantaneous field view of the imaging instrument. In this paper, we give a comprehensive enumeration of the unmixing methods used in practice,doi:10.1109/whispers.2010.5594929 dblp:conf/whispers/ParenteP10 fatcat:ybec77vlnvc4zhd4rsfdyirbvi