Image Super-Resolution Based on Sparse Representation via Direction and Edge Dictionaries

Table 1

PSNR (dB) results by different methods (the upscaling factor 2).

Images	Bicubic	Yang	Zedye	NCSR	ANR	CSC	Our
Butterfly	27.43	30.16	29.93	29.39	29.67	31.95	29.69
Child	31.93	33.36	33.26	30.84	33.20	33.68	33.19
Hat	31.73	33.50	33.28	31.00	33.24	34.74	33.30
Lena	32.70	34.48	34.19	31.31	34.28	35.63	34.27
Parrot	31.25	33.45	32.96	30.80	33.18	34.56	33.21
Plant	34.30	36.56	36.37	32.53	36.28	38.75	36.24
Parthenon	28.07	29.09	28.98	28.03	28.87	29.49	28.91
Bike	25.64	27.68	27.39	26.87	27.52	28.93	27.57
Comic	26.01	27.71	27.42	26.96	27.52	28.40	27.55
Flower	30.36	32.28	31.97	30.33	31.96	33.13	32.05
Foreman	32.76	34.08	35.92	31.47	35.83	36.62	34.07
Girl	34.74	35.53	35.45	31.92	35.55	35.68	35.48
Pepper	33.15	34.08	36.31	31.64	36.01	36.90	34.04
Raccoon	30.95	32.38	32.04	29.97	32.33	32.96	32.43
Woman	32.14	34.37	34.20	31.44	34.13	35.31	34.04
Zebra	30.63	33.20	32.92	30.91	32.70	33.69	32.83
Average	30.862	32.619	32.662	30.338	32.642	33.776	32.429