Noisy image magnification with total variation regularization and order-changed dictionary learning

EURASIP Journal on Advances in Signal Processing

Table 2 The average PSNR and SSIM values for different methods (4 ×)

Method	Zeyde	ANR	ANR plus	SPM	DCN	Proposed
Without	26.812	26.680	27.172	26.951	27.059	27.129
noise	0.7841	0.7806	0.7860	0.7771	0.7780	0.7995
σ=5	25.494	25.335	25.623	25.535	25.766	26.055
	0.6796	0.6651	0.6774	0.6809	0.6916	0.7409
σ=10	23.476	23.138	23.115	22.863	23.337	23.762
	0.5445	0.5208	0.5194	0.5100	0.5409	0.6061
σ=15	21.485	21.055	20.858	20.428	20.964	21.413
	0.4350	0.4100	0.4032	0.3831	0.4171	0.4709
σ=20	19.810	19.323	19.045	18.503	19.005	19.428
	0.3539	0.3298	0.3200	0.2982	0.3283	0.3697

PSNR, peak signal-to-noise ratio; SSIM, structural similarity; ANR, Anchored Neighborhood Regression; SPM, Statistical Prediction Model; DCN, Deep Convolutional Network.