Dear i will be analysing hyperion image, after doing atmospheric correction ie.FLASSH, i want to do linear spectral unmixing , in these selecting endmembers from the spectral library and spectral data from lab spectra, giving input to the linear spectral unmixing not showing good results for abundance mapping of minerals. Then what procedure i should follow, first MNF , PPI, then remove extreme pixels from the image, if your telling correct procedure for the linear spectral unmixing it will be useful for my research Thank You