Results of the decomposition for the MC-NMF, SpaceCorr, and MASS methods in the most sparse case (d = 6σ_Map). Estimated spectrum is in blue, actual spectrum is in black dashes, and red error bars give the spread of the solutions of MC-NMF. Each subfigure caption contains the name of the considered BSS method, followed by the NRMSE of the estimated abundance map and the SAM of the estimated spectrum (see Eqs. (35) and (36)). This also applies to the subsequent figures. (a) MC-NMF (20.81%, 0.107 rad). (b) SpaceCorr (2.69%, 0.019 rad). (c) MASS (2.07%, 0.019 rad).