Fig. 7From: Multivariate unmixing approaches on Raman images of plant cell walls: new insights or overinterpretation of results?Comparison of endmember spectra given by VCA (in red), NMF (in black), MCR-ALS without PCA (in blue) and MCR-ALS with PCA (in green) of Raman data of Spruce with 5 endmembers and previous background subtractionBack to article page