Fig. 5From: Multivariate unmixing approaches on Raman images of plant cell walls: new insights or overinterpretation of results?Comparison of multivariate methods on background subtracted Raman data of Spruce. Endmember spectra given by VCA (in red), NMF (in black), MCR-ALS without PCA (in blue) and MCR-ALS with PCA (in green). Endmembers are grouped following the column order given by Fig. 4Back to article page