Research Article
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 |
|
|