| Autor: |
D. Levicky, R. Ridzon |
| Jazyk: |
angličtina |
| Rok vydání: |
2007 |
| Předmět: |
|
| Zdroj: |
Radioengineering, Vol 16, Iss 4, Pp 76-81 (2007) |
| Druh dokumentu: |
article |
| ISSN: |
1210-2512 |
| Popis: |
The geometrical attacks are still an open problem for many digital watermarking algorithms used in present time. Most of geometrical attacks can be described by using affine transforms. This article deals with digital watermarking in images robust against the affine transformations. The new approach to improve robustness against geometrical attacks is presented. The discrete Fourier transform and log-polar mapping is used for watermark embedding and for watermark detection. Some attacks against the embedded watermarks are performed and the results are given. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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