VLSI Implementation of a High-Performance Nonlinear Image Scaling Algorithm

Table 1

Comparison of PSNR of existing and proposed image scaling techniques with scaling factor 2.

Image details	BI [44]	BI with the prefilter [41]	High-boost filter [7]	APNN [42]	UTDCF [43]	Proposed EWMI
		High-resolution images (4 megapixels)
Parrots	28.70	39.86	45.94	46.56	47.32	48.39
Flower	27.66	39.45	46.57	46.86	47.92	49.13
Vegetables	29.24	39.58	46.46	47.21	47.56	48.47
		Low-resolution images (1 megapixel)
Pepper	25.78	31.98	41.23	42.65	43.12	45.44
Camera man	25.93	32.34	40.74	43.23	44.19	45.67
Parrots	26.14	33.56	41.32	42.87	45.54	46.46
		Images with impulse noise (0.4–0.7 variance)
Parrots	22.45	28.34	39.11	40.04	41.38	42.33
Missile	22.11	28.45	38.76	39.56	42.95	43.67
Lena	21.67	27.99	39.10	40.17	41.93	43.56
		Images with JPEG artifacts and blur
Parrots	19.75	25.61	36.23	38.54	39.80	41.23
Flower	20.44	25.45	36.79	37.76	38.79	40.74
Vegetables	20.69	26.77	37.21	39.98	40.85	41.32