Research Article
Blind Image Watermarking Based on Adaptive Data Spreading in n-Level DWT Subbands
Table 4
Specifications of the existing schemes for comparison.
| Items | Proposed | [17] | [16] | [15] | [14] | [9] |
| # of test images | 60 | 11 | 1 | 164 | 4 | 3 |
| watermark data | - | 32×16 | 32×32 | 64×64 | 64×64 | 32×32 |
| Q-step | 3~10 | 12 | 42.5 | 270~ 24,500 | 23+p | 20 |
| Payload | 49,152~163,840 for 32×32 data | 6,114 | 43,520 | 1,105,920~ 100,352,000 | 94,208+P | 20,480 |
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