This paper presents a new spread-spectrum watermarking algorithm for digital images in discrete wavelet transform (DWT) domain. The algorithm is applied for embedding watermarks like patient identification /source identification or doctors signature in binary image format into host digital radiological image for potential telemedicine applications. Performance of the algorithm is analysed by va...

-------------------------------------------------------Abstract----------------------------------------------------------Digital watermarking is process of embedding information into a digital signal which is used to know about its authencity or identity of its owners and producers in the same manner as document having a bench mark for visible identification. This paper presents an innovative w...

Due to rapid increase of internet these days has raised the worth of digital media all over the world. Digital watermarking is an application associated with copyright protection. Any digital object can be used as a carrier to carry information. If the information is related to object then it is known as a watermark which can be visible or invisible. Robustness is checked well by extracting ori...

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...

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...