Abstract
The popular formulas currently used to evaluate the similarity of digital watermarks have serious drawbacks: when the similarity degree is 1, the watermarks are not unique. This paper firstly analyze the drawbacks in the popular formulas. Then proposes a new formula similarity degree, which eliminates the shortcomings of the existing formulas and overcome the lack of uniqueness in theory. From the experiment results the new formula not only does well in evaluating the watermark's similarity degree, also is in good accordance with visual perception.
| Original language | English |
|---|---|
| Pages (from-to) | 1417-1422 |
| Number of pages | 6 |
| Journal | Journal of Information and Computational Science |
| Volume | 7 |
| Issue number | 6 |
| Publication status | Published - 1 Jun 2010 |
Keywords
- Digital watermarking
- Normalized correlation
- Similarity
ASJC Scopus subject areas
- Information Systems
- Computer Graphics and Computer-Aided Design
- Computational Theory and Mathematics
- Library and Information Sciences