Image watermaking for owner and content authentication
MULTIMEDIA '00 Proceedings of the eighth ACM international conference on Multimedia
Digital watermarking
Analyses of error correction strategies for typical communication channels in watermarking
Signal Processing - Special section on information theoretic aspects of digital watermarking
Watermarking medical signals for telemedicine
IEEE Transactions on Information Technology in Biomedicine
IEEE Transactions on Image Processing
Applying informed coding and embedding to design a robust high-capacity watermark
IEEE Transactions on Image Processing
From single watermark to dual watermark: A new approach for image watermarking
Computers and Electrical Engineering
A novel approach to digital watermarking, exploiting colour spaces
Signal Processing
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This paper is an attempt to describe the concept of double watermarking. The latter term refers to a new watermarking algorithm based on embedding mark (signature) in both spatial and multi-resolution domain. For the purpose of increasing the image watermarking robustness against attacks of an image transmission, we encode with a turbo code an image-embedded mark. This new scheme of image watermarking is able to embed 2000 bits in medical images. Results of experiments carried out on a database of 30- 256x256 pixel-sized medical images show that watermarks are robust to Noises, Filter attacks, JPEG Compression and geometric distortion such as Cropping. Results demonstrate that fidelity can be improved by incorporating a codage that is shaped into the embedding process. Other advantages of the two embedding domains are to preserve intellectual features and to secure the mark in the image. The image degradation is measured by Relative Peak Signal to Noise Ratio (RPSNR). Experimental results show that this unit of measurement is the best distortion metric witch is correlated with Human Visual System (HVS); and therefore more suitable for digital watermarking.