Single image super-resolution by directionally structured coupled dictionary learning

Ahmed, Junaid; Shah, Madad Ali

doi:10.1186/s13640-016-0141-6

EURASIP Journal on Image and Video Processing

Table 2 PSNR (top left), sharpness (bottom left), SSIM (top right), and contrast (bottom right), for each image first row (scale factor 3) and second row (scale factor 4) comparison of the bicubic (Bic.) technique, algorithm of Yang et al.’s [11], algorithm of Xu et al.’s [12], and the proposed algorithm

From: Single image super-resolution by directionally structured coupled dictionary learning

Images	Bic.		[11]		[12]		Proposed (PMS)
AnnieYukiTim	26.04	0.7870	30.66	0.8957	30.64	0.8950	31.3	0.8990
	0.6800	0.3932	0.5118	0.2493	0.5118	0.2463	0.4868	0.2533
	26.94	0.7600	27.62	0.8174	27.62	0.8169	28.10	0.8211
	0.8059	0.5246	0.6938	0.3900	0.6935	0.3891	0.6719	0.3904
Barbara	24.52	0.7111	25.24	0.7490	24.60	0.7254	25.62	0.7727
	0.8606	0.6644	0.7807	0.5842	0.7791	0.5820	0.7629	0.5834
	23.60	0.6570	23.82	0.6744	23.82	0.6743	24.15	0.7018
	0.9102	0.7360	0.8631	0.6765	0.8628	0.6756	0.8429	0.6732
BooksCIMAT	22.20	0.6360	24.72	0.8102	24.69	0.8087	24.77	0.8210
	0.7883	0.5292	0.6059	0.3423	0.6078	0.3417	0.5867	0.3353
	21.62	0.5863	22.94	0.7007	22.94	0.7007	23.30	0.7104
	0.8585	0.5998	0.7459	0.4505	0.7462	0.4502	0.7310	0.4517
Butterfly	20.99	0.7329	25.89	0.8627	25.83	0.8600	26.65	0.8652
	0.6085	0.2283	0.4148	0.0736	0.4119	0.0679	0.3824	0.0876
	22.14	0.6990	23.00	0.7564	23.00	0.7550	23.75	0.7655
	0.7362	0.3279	0.5921	0.1543	0.5874	0.1520	0.5567	0.1616
Fence	22.20	0.5741	22.70	0.6494	22.69	0.6488	23.84	0.6894
	0.8202	0.6847	0.6854	0.5192	0.6793	0.5234	0.6740	0.5378
	21.49	0.4885	21.87	0.5547	21.89	0.5545	22.13	0.5692
	0.9082	0.7965	0.8420	0.7037	0.8425	0.7033	0.8243	0.7014
ForbiddenCity	22.38	0.4415	24.02	0.6123	24.06	0.6140	24.20	0.6294
	0.8500	0.7079	0.7470	0.5722	0.7482	0.5717	0.7185	0.5572
	22.06	0.3498	22.73	0.4615	22.74	0.4625	23.23	0.4976
	0.9151	0.7982	0.8411	0.6791	0.8426	0.6794	0.8204	0.6733
HowMany	23.56	0.6774	27.15	0.8396	27.12	0.8384	27.71	0.8432
	0.6947	0.3788	0.5326	0.2429	0.5338	0.2413	0.5068	0.2460
	22.96	0.6048	24.85	0.7303	24.85	0.7295	25.30	0.7995
	0.7996	0.4872	0.6855	0.3499	0.6842	0.3493	0.6611	0.3505
Kodak-05	23.05	0.6121	24.28	0.7147	24.25	0.7136	24.81	0.7381
	0.8003	0.5698	0.6708	0.4227	0.6716	0.4212	0.6503	0.4251
	20.80	0.4341	22.60	0.5945	22.58	0.5936	23.95	0.6320
	0.8862	0.6848	0.8120	0.5702	0.8114	0.5691	0.7886	0.5623
Kodak-08	20.72	0.5695	21.84	0.6723	21.84	0.6724	22.50	0.7070
	0.8180	0.5988	0.7058	0.4691	0.7065	0.4673	0.6818	0.4688
	18.70	0.3914	20.61	0.5493	20.60	0.5497	21.71	0.6603
	0.8971	0.7025	0.8349	0.6098	0.8357	0.6080	0.8072	0.6035
Michoacan	21.22	0.6522	22.64	0.7446	22.61	0.7429	23.23	0.7605
	0.7766	0.5345	0.6365	0.3887	0.6357	0.3870	0.6112	0.3900
	18.76	0.4721	20.84	0.6253	20.81	0.6235	21.10	0.6758
	0.8715	0.6503	0.7878	0.5359	0.7886	0.5346	0.7630	0.5290
MissionBay	24.13	0.7399	25.52	0.8019	25.50	0.8021	26.35	0.8167
	0.7566	0.4472	0.6129	0.3053	0.6139	0.3056	0.5816	0.3122
	21.77	0.6162	24.05	0.7309	24.06	0.7305	24.93	0.8129
	0.8149	0.5062	0.6985	0.3702	0.6980	0.3704	0.6697	0.3707
NuRegions	15.08	0.5079	18.22	0.7765	18.24	0.7765	18.84	0.7840
	0.7198	0.4805	0.5369	0.2410	0.5419	0.2402	0.5176	0.2395
	13.39	0.2408	15.70	0.5647	15.72	0.5657	16.21	0.6836
	0.8503	0.6714	0.7069	0.4420	0.7091	0.4416	0.6907	0.4369
Peppers	24.00	0.7678	28.58	0.9013	28.52	0.8993	28.99	0.9810
	0.6997	0.3360	0.5512	0.2168	0.5502	0.2153	0.5100	0.2160
	25.34	0.7786	26.63	0.8377	26.56	0.8355	27.30	0.9130
	0.7447	0.3731	0.6059	0.2406	0.6061	0.2382	0.5710	0.2425
Rocio	30.27	0.8704	33.77	0.9376	33.70	0.9327	34.42	0.9390
	0.5753	0.2492	0.3732	0.1271	0.3739	0.1237	0.3374	0.1335
	29.27	0.8407	31.22	0.8926	31.22	0.8917	32.77	0.9010
	0.6694	0.3241	0.5114	0.1975	0.5110	0.1964	0.4725	0.1991
Starfish	24.38	0.7056	28.67	0.8643	28.61	0.8625	29.24	0.8720
	0.6675	0.3748	0.4815	0.2229	0.4835	0.2220	0.4580	0.2238
	25.18	0.6960	25.79	0.7595	25.78	0.7584	26.34	0.8020
	0.7960	0.5033	0.6746	0.3647	0.6734	0.3634	0.6517	0.3616
Yan	24.27	0.6847	26.42	0.8061	26.41	0.8057	27.30	0.8121
	0.7470	0.4719	0.5922	0.3134	0.5933	0.3123	0.5640	0.3188
	22.74	0.6047	24.12	0.6907	24.14	0.6910	25.71	0.7019
	0.8496	0.5864	0.7534	0.4532	0.7527	0.4529	0.7246	0.4526
Average	23.06	0.6669	25.65	0.7899	25.58	0.7874	26.24	0.8081
	0.7414	0.4781	0.5900	0.3307	0.5902	0.3293	0.5644	0.3330
	22.30	0.5763	23.65	0.6838	23.65	0.6833	24.37	0.7280
	0.8321	0.5795	0.7281	0.4493	0.7278	0.4483	0.7030	0.4475

The data in boldface signifies highest value in comparison

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