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- Title
RST ROBUST WATERMAKING SCHEMA BASED ON IMAGE NORMALIZATION AND DCT DECOMPOSITION.
- Authors
Mohammed, Faraoun Kamel; Abbes, Rabhi
- Abstract
Geometric distortions are generally simple and effective attack to many existing watermarking methods which can make detection of the embedded watermark difficult or even impossible. A robust watermarking system must be able to encounter such attacks based on rotation, scaling and translation operators (RST attacks). In this paper, we describe a new robust watermarking schema based on logo embedding in the DCT transformed domain using image normalization techniques. In contrast to existing approaches, the watermark is not embedded directly in the normalized image. The image normalization is just used for calculating the affine transform parameters so that the watermark embedding and detection is performed in the original coordinates system. The performed experiments show that the proposed algorithm is robust against various types of attacks such as low-pass, median, Gaussian noise, aspect ratio change, rotation, scaling, JPEG compression, and the combination of these attacks.
- Subjects
DIGITAL image watermarking; DIGITAL watermarking; RANDOM noise theory; ASPECT ratio (Images); DATA compression; DIGITAL image processing
- Publication
Malaysian Journal of Computer Science, 2007, Vol 20, Issue 1, p77
- ISSN
0127-9084
- Publication type
Article
- DOI
10.22452/mjcs.vol20no1.7