Table 3. Quantitative evaluations of spatial fidelity.

	RMSE	SAM	SSIM
Proposed	0.019061	0.244769	0.961711
IHS	0.008567	0.463047	0.987525
PCA	0.032934	0.606178	0.896495
GS	0.005778	0.778608	0.995644
GSA	0.032794	0.843018	0.855780
wavelet	0.038264	0.295743	0.830420