“…The former class includes intensity-hue-saturation method (IHS) (Tu et al, 2001), principal component analysis method (PCA) (Psjr et al, 1991, Shah et al, 2008, and Gram-Schmidt (GS) method (Vivone et al, 2015). The MRA methods comprise decimated wavelet transform (DWT) (Mallat, 1989), undecimated wavelet transform (UDWT) (Nason et al, 1995), "à trous" wavelet transform (ATWT) (Vivone et al, 2013, Shensa, 1992, Laplacian pyramid (LP) (Burt et al, 2003), and morphological pyramids (Restaino et al, 2016). More specifically, the pansharpening methods aim to inject the spatial details of PAN image into the MS bands.…”