Anil Kumar 0001Ashish Kumar BhandariP. PadhyImproved normalised difference vegetation index method based on discrete cosine transform and singular value decomposition for satellite image processing.617-62520126IET Signal Process.7https://doi.org/10.1049/iet-spr.2011.0298db/journals/iet-spr/iet-spr6.html#0001BP12