Digital image watermarking is receiving widespread attention to protect applications of intellectual property rights. In image watermarking, information is embedded in cover image to prove ownership. This information must remain detectable even if image is manipulated. Applications of digital image watermarking include trusted cameras, journalistic photography, prevention of identity photo forg...

In this paper, a new approach to Spread Spectrum (SS) watermarking technique is introduced. This problem is particularly interesting in the field of modern multimedia applications like internet when copyright protection of digital image is required. The approach exploits two-predecessor single attractor (TPSA) cellular automata (CA) suitability to work as efficient authentication function in wa...

The growth of computer networks has boosted the growth of the information technology sector to a greater extent. There is a trend to move from conventional libraries to digital libraries. Embedding a digital signal with information which cannot be removed easily is called ‘Digital Watermarking’. Visible watermarking is a type of digital watermarking used for protection of publicly available ima...

The information is in present in form of digital media. Digital watermarking was acquainted to provide the copy right protection and owners’ authentication. A digital watermarking is secret information that is embedded inside an image. The digital watermarking for video an effective method to protect the video copyright. Digital video watermarking is the process embedding digital information in...

The imaging technology is being enhancing day by day, there are a lot of possibilities of reproduction and manipulation of digital data such as digital image, digital audio and digital video, hence a strong digital copyright mechanism must be produced in place. So the protection of digital data content from unauthorized users and the problem of copyright management plays very vital role. The Di...

In this paper a novel blind watermarking technique for color images using DCT has been proposed. Inproposed technique cover image is decomposed into 3 planes, namely R, G, B and for watermarking B plane is selected. B plane is divided into blocks of size 8×8. DCT is applied to each 8×8 sized block and middle frequency coefficients are selected for embedding watermark. Finally binary watermark i...

a watermarking scheme for Grayscale image is proposed based on a family of the chaotic maps and discrete cosine transform. Jacobian Elliptic mapis employed to encrypt of watermarked logo. Piecewise nonlinear chaotic map is also used to determine the location of DCT coefficients for the watermark embedding. The purpose of this algorithm is to improve the shortcoming of watermarking such as small...

Embedding a digital signal with information which cannot be removed easily is called „Digital watermarking‟. In visible watermarking of images, a secondary image is embedded in a primary image such that watermark is intentionally perceptible to human observer.The present work aims at visible watermarking algorithm based on luminance parameters in DCT domain. Visible watermarking is a type of di...

Digital watermarking has been proposed as a technology to ensure copyright protection by embedding an imperceptible, yet detectable signal in visual multimedia content such as images or video. Watermark detection is an integral component of a watermarking system. This cumulative thesis addresses watermark detection problems in important application domains such as scalable multimedia, raw/demos...

One way for copyright protection is digital watermarking. Digital watermarking is the process of embedding information regarding the authenticity or the identity of the owners into a image or any piece of data. Digital watermarking has been classified into two types :Visible and Invisible Watermarking. In visible digital watermarking, the embedded information is visible. Typically, the informat...