This paper investigates digital data hiding schemes. The concept of information hiding will be explained at first, and its traits, requirements, and applications will be described subsequently. In order to design a digital data hiding system, one should first become familiar with the concepts and criteria of information hiding. Having knowledge about the host signal, which may be audio, image, ...

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 ...

Digital multimedia watermarking technology was suggested in the last decade to embed copyright information in digital objects such images, audio and video. However, the increasing use of relational database systems in many real-life applications created an ever increasing need for watermarking database systems. As a result, watermarking relational database systems is now merging as a research a...

There are a lot of wavelet-based approaches in digital image watermarking literature. In these approaches, the main issue is selection method of wavelet sub-bands’ coefficients and embedding algorithm. In this approach, an entropy-based method is proposed for non-blind watermarking of still gray level images using discrete wavelet transform. In our approach, we have also used the Discrete Wavel...

The trade-off between the imperceptibility and robustness is one of the most challenges in digital watermarking system. To solve the problem, this paper proposes an improved blind digital watermarking algorithm for images based on the combination of Discrete Wavelet Transform (DWT) decomposition and Particle Swarm Optimization (PSO). For protecting the copyright information of a digital image, ...

Problem statement: Digital multimedia watermarking technology was suggested in the last decade to embed copyright information in digital objects such images, audio and video. However, the increasing use of relational database systems in many real-life applications created an ever increasing need for watermarking database systems. As a result, watermarking relational database systems is now merg...

Digital watermark is an effectual way to protect the rightful ownership of multimedia data. In this paper, a three-tier Blind watermarking scheme is proposed, in which three independent binary watermarks are embedded in a grayscale digital image. In order to embed multi-watermarks simultaneously to improve the security of watermarked image and also robustness of extracted watermarks, the three ...

Internet and Multimedia technologies have become our daily needs. Hence it has become a common practice to create copy, transmit and distribute digital data. Obviously, it leads to unauthorized replication problem. Digital image watermarking provides copyright protection to image by hiding appropriate information in original image to declare rightful ownership. Aim of this paper is to provide c...

This paper proposed a novel blind color digital watermarking algorithm based on Integer Discrete Wavelet Transform (IDWT) and Human Visual System (HVS). Firstly, color watermark image was processed into one dimension digital information, and color host image was converted into YIQ color space. Then, according to the features of HVS, encrypted watermark was embedded adaptively into the Y luminan...

Together with an explosive growth in the use of internet and high speed computer networks; the use of digitally formatted data has increased many folds i.e. the data can be easily plagiarized, modified or deleted without proper authentication and authorization. This has led to a need for effective copyright protection tools. Digital Watermarking promises to address these issues. This paper give...