Retrieval of tea polyphenol at leaf level using spectral transformation and multi-variate statistical approach. - Dibyendu Dutta; Prabir Kumar Das; Uttam Kumar Bhunia; Upasana Singh; Shalini Singh; Jaswant Raj Sharma; Vinay Kumar Dadhwal (Int. J. Appl. Earth Obs. Geoinformation, 2015)