Table 3 The minimum and maximum of 
.
.From: Digital Watermarking Method Warranting the Lower Limit of Image Quality of Watermarked Images
| Â | MTF | JPEG75 | JPEG50 | |
|---|---|---|---|---|
| Â | min | max | ||
aerial | 8 | 52 | 146 | 181 |
airplane | 8 | 11 | 18 | 35 |
balloon | 7 | 7 | 19 | 26 |
couple | 6 | 66 | 42 | 89 |
earth | 7 | 51 | 56 | 86 |
girl | 6 | 37 | 44 | 56 |
lena | 10 | 47 | 55 | 54 |
mandrill | 6 | 101 | 136 | 154 |
milkdrop | 10 | 44 | 78 | 89 |
parrots | 7 | 7 | 38 | 43 |
pepper | 8 | 81 | 123 | 162 |
sailboat | 12 | 13 | 37 | 54 |