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Video watermarking is a relatively new technology that has been proposed to solve the problem of illegal manipulation and distribution of digital video. By virtue of this technology, copyright information is embedded in the video data to provide ownership verification. In this paper, we propose an effective, robust, and imperceptible video watermarking algorithm. The effectiveness of algorithm is...
We introduce multiple validations (MV), a statistical paradigm that can be applied to a variety of large-scale optimization problems in sensor networks (SNs). MV works by resampling the underlying space of the optimization inputs, multiple optimization runs, and clustering the output solutions. We discuss the degree of freedom in resampling the inputs, so as not to change the combinatorial aspects...
In this paper we analyze the robustness of watermarking method in still images using Haar, Daubecheies and biorthogonal wavelets. The embedding process uses a canny edge detection method and hides the watermark with the perceptual considerations on different modalities of images. The extraction scheme uses non-blind method to retrieve the watermark. We simulate the JPEG compression attack with different...
One of the main properties of semi-fragile image watermarking methods is robustness against lossy compressions, e.g. JPEG conversion. In this paper, robustness of a semi-fragile watermarking scheme based on DWT (Discrete Wavelet Transform), coupled with SVD (Singular Value Decomposition), is improved. To achieve this goal a traditional, critically sampled wavelet transform is replaced by a redundant...
Medical images of all types are produced in hospitals and health centers more than ever. The ease of production of medical images has been facilitated by the advancements in information and communication technologies. Traditional methods used to manage medical images fall short in coping with the great amount of information inherited in medical images. Therefore, there remains immediate need to develop...
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