Fast growth in digital media, digital data (such as image, video, audio or text) are stored, transmitted and distributed through internet without any loss or damage of content. Digital image watermarking is use to protect data from manipulations. Watermarking not only allow user to access, view and interpret the image but also protects the ownership of the content, as protection is an important...

Digital watermarking is a good tool for healthcare information management systems. The wellknown quantization-index-modulationQIMbased watermarking has its limitations as the host imagewill be destroyed; however, the recovery ofmedical image is essential to avoidmisdiagnosis. A transparent yet reversible watermarking algorithm is required for medical image applications. In this paper, we propos...

Due to the extensive use of digital media applications, multimedia security and copyright protection has gained tremendous importance. Digital Watermarking is a technology used for the copyright protection of digital applications. In this project, a comprehensive approach for watermarking digital image is introduced. We propose a hybrid digital watermarking scheme based on Discrete Wavelet Tran...

In the digital image watermarking community, developing a robust watermarking method has withdrawn attention in recent years. In this paper, robust image watermark algorithm is proposed which is based on histogram shape and Butterworth filtering that resist against geometric attack and signal processing attack by using invariance property of histogram to scaling and without exploiting robust fe...

Digital watermarking methods have been recently proposed for various purposes and especially for copyright protection of multimedia data. The digital watermark is embedded in a digital signal or an image and must be unrecognizable by unauthorized persons and detectable only by the legal copyright owner. In this paper we use toral automorphisms as chaotic 2 D integer vector generators in order t...

Digital image manipulation software is now readily available on personal computers. It is therefore very simple to tamper with any image and make it available to others. Ensuring digital image security has therefore become a major issue. Watermarking has become a popular technique for copyright enforcement and image authentication. The aim of this paper is to present an overview of some possibl...

The major source of communication in present world is digital media. As it is quite easy to manipulate a digital media, it becomes essential to protect the digital information by legitimate means. Digital Watermarking has evolved as one of the latest technologies for digital media protection. Many techniques based on spatial and frequency domain have been developed in the recent past and are be...

Today the quality of copying machines makes it possible for everyone to copy any kind of printed documents without significant loss of quality. Especially copying of printed music is often done. At the same time web-based distribution of music scores in digital representations becomes widespread. Although copying music scores can’t be stopped, it is possible to trace a leak by hiding informatio...