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

EURASIP Journal on Advances in Signal Processing

Table 1 The average PSNR and SSIM values for different methods (3 ×)

Method	Zeyde	ANR	ANR plus	SPM	DCN	Proposed
Without	28.762	27.545	29.376	29.080	29.255	29.238
noise	0.8539	0.8411	0.8535	0.8465	0.8453	0.8586
σ=5	27.044	26.851	27.181	27.089	27.191	27.673
	0.7273	0.7129	0.7189	0.7268	0.7223	0.7980
σ=10	24.460	24.101	24.020	23.714	23.996	24.836
	0.5662	0.5440	0.5381	0.5280	0.5376	0.6381
σ=15	22.129	21.698	21.420	20.912	21.281	22.079
	0.4436	0.4216	0.4110	0.3898	0.4047	0.4801
σ=20	20.238	19.762	19.403	18.811	19.190	19.838
	0.3588	0.3383	0.3260	0.3029	0.3174	0.3716

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