Research Article
Robust Signature-Based Copyright Protection Scheme Using the Most Significant Gray-Scale Bits of the Image
Table 10
Comparisons of different approaches of the proposed scheme and existing schemes [
12,
13].
| Issues | Existing | Approaches of the proposed MSB-based scheme | TROI [12] | VQ [13] | UROI | TBLK | DCTMSB | t-DWT |
| Transparency | yes | yes | yes | yes | yes | yes | Robustness | no | no | high | moderate | high | no | Uniqueness | no | yes | yes | yes | yes | yes | Unambiguous | no | no | yes | yes | yes | no | Security | yes | yes | yes | yes | yes | yes | Blindness | semi-blind | blind | semi-blind | semi-blind | semi-blind | semi-blind | Multiple logo | yes | yes | yes | yes | yes | yes | Publicly verifiable | no | yes | no | no | no | no | StirMark resistance | no | no | moderate | low | moderate | no | MSB attack resistance | moderate | high | moderate | moderate | moderate | high | Scalability1 | no | no | yes | yes | yes | yes | Signature addition2 | no | yes | no | no | no | no | JPEG quality < 10 | low | high | high | high | high | high | Operation domain | spatial | DWT | spatial | spatial | DCT | DWT | Time complexity | high | high | constant | low | low | low | Algorithm simplicity | no | no | yes | yes | yes | yes | Region-of-interest used | yes | no | yes | no | no | no |
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1Signature calculation using different types of image and logo. 2With image header.
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