Digital watermarking is the technique of inserting specific information into signal, data, image or video. Copyright protection, data authentication, covert communication and content identification can be achieved by Digital watermarking. This work aims at developing a robust and secure blind watermarking technique for speech signal. The speech is watermarked using Virtex-5 FPGA which implement...

Recent advances in the Internet have simplified data manipulation on the web, so protection of copyrighted contents is a tough task. Digital image watermarking is a solution to this problem, which embed the watermark with intellectual property rights into images. Developing the methods that satisfy both imperceptibility and robustness is the main challenge for researchers. In this paper a novel...

In this paper we investigate a watermarking application for bookmarking of video content using a mobile phone’s camera. A content identifier and time-stamp information are embedded in individual video frames and decoded from a single frame captured from a display device, allowing to remember (’bookmark’) scenes in the video. We propose a simple watermarking scheme and blind image registration t...

Digital watermarking seems to be one of the most promising methods for copyright protection of digital images, authentication, labeling and monitoring. Since digital images can be published in the Internet, anyone can access and manipulate them. Such kind of manipulations (attacks) falls in one of the following categories: (a) those applied without malicious purposes and (b) those applied with ...

Watermarking has become an important tool for multimedia object creator or distributor to address the growing concern of multimedia owners. An attempt has been made to develop a complete secure digital stereo image non-blind watermarking system for effective copyright protection. The objective is to embed by watermarking into one stereo image the information needed to recover the other stereo p...

Due to the lack of invariant property of discrete wavelet transform (DWT), the DWT based watermarking schemes are relatively vulnerable to the watermarking attacks such as geometric variations (i.e., rotation and translation etc.). To improve the reliability of the DWT based watermark detection, this paper introduces the new multiresolution based image registration method that is used to recove...

a r t i c l e i n f o a b s t r a c t Keywords: Digital image watermarking Integer wavelet transform Singular value decomposition Wilcoxon signed rank test Digital signature In this paper, a new robust and secure digital image watermarking scheme that can be used for copyright protection is proposed. The scheme uses the integer wavelet transform (IWT) and singular value decomposition (SVD). The...

This paper presents a modified digital image watermarking method based on nonnegative matrix factorization. Firstly, host image is factorized to the product of three nonnegative matrices. Then, the centric matrix is transferred to discrete cosine transform domain. Watermark is embedded in low frequency band of this matrix and next, the reverse of the transform is computed. Finally, watermarked ...

Visual Cryptographic Scheme is a special technique used to send the data securely over the network. It is a technique which allows visual information (pictures etc.) to be encrypted in such a way that the decryption can be performed by the human, without using any decryption algorithm or without doing any computation. In this paper we have introduced the new technique known as the “Digital Wate...

In this paper a new blind technique using one dimensional Walsh coding to improve the robustness of image watermarking is presented. The proposed technique inserts the binary bits of handwritten signatures in the DCT blocks of the Y channel of the digital colour image. Watermarking algorithm which uses 1-D Walsh coding to embed mobile phone digits in images captured by the phone camera is also ...