Table 1.

Quantitative evaluation of different methods.

Method	Noise level	CE	SF	$Q_{\mathrm{CV}}$	SSIM
DTCWT	No noise	0.1008	28.24	34.42	1.7263
	25 dB	0.1200	33.92	44.17	1.4280
GFDF	No noise	0.0977	27.11	140.85	1.7241
	25 dB	0.1012	33.10	132.11	1.4412
Proposed	No noise	0.0863	28.82	25.37	1.7264
	25 dB	0.0976	34.39	35.96	1.4277