Table 2. Quantitative evaluations of spectral fidelity.

	RMSE	SAM	SSIM
Proposed	0.016311	0.443015	0.945394
IHS	0.058156	1.173754	0.699413
PCA	0.068293	1.737406	0.645862
GS	0.083208	2.571745	0.694513
GSA	0.037992	1.351162	0.813643
wavelet	0.017518	0.477239	0.943940