Comments on 'Robust embedding of visual watermarks using discrete wavelet transform and singular value decomposition' and theoretical analysis
| Autor: | Liang Xiao, Jianbing Ye, Zhihui Wei |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Discrete wavelet transform
Discrete mathematics Watermark Atomic and Molecular Physics and Optics Computer Science Applications Wavelet packet decomposition Singular value Singular value decomposition Electrical and Electronic Engineering Digital watermarking Singular spectrum analysis Algorithm Image restoration Mathematics |
| Zdroj: | Journal of Electronic Imaging. 17:040501 |
| ISSN: | 1017-9909 |
| DOI: | 10.1117/1.3041170 |
| Popis: | It is shown that the watermarking algorithm presented in another paper [Ganic and Eskicioglu, J. Electron. Imaging 14, 043004 (2005)] has a very high probability of a false-positive answer and has its limitations in practice. Furthermore, the intrinsic reasons of the high false-alarm probability are as follows: the basis space of singular value decomposition is image content dependent, there is no one-to-one correspondence between singular value vector and image content, because singular value vectors have no information on the structure of image. Thus, the most important reason is a result of a false conception to insert watermark singular value vectors without information on the structure of the watermark. Finally, some examples are given to prove our results of theoretical analysis. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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