Novel and Robust Digital Image Watermarking Techniques A Hybrid Approach

Abstract

Digital image watermarking means hiding of piece of data onto an image to attest its owner or to authorize it. Digital watermark is an indicator that is hidden into a virtual media to guard it from copyright infringement. The digital bitmap or image onto which the authentication message or the watermark is embedded can be called as the original host image. After implanting the watermark onto the cover image, it becomes a watermarked image. newlineAmount of data transmitted throughout the internet is rising due to swift advancements amongst technology and technology availability itself, thus the requirement for security of media like image, text, audio, video, etc has increased greatly. Digital watermarking method has become hugely significant in our community of internet. Digital watermarking techniques have been utilized in order to prevent the digital media against the illicit circulation in the form of bitmaps, audio and videos or any media. The basic idea of digital watermarking is to embed a watermark signal into the host data for the purpose of copyright protection, access control, broadcast monitoring, owner identification etc. A watermark can be in any form, a tag, label or digital signal. A host may be multimedia object such as image, audio or video. Since images form the basic components of multimedia, it becomes critical to develop an effective watermarking technique for images. The most prominent method of embedding information in multimedia data is the use of digital watermarking. Digital watermarking method should fulfill three basic yet most important requirements when watermarking, robustness, perceptibility and payload capacity. newlineMost of the watermarking techniques share same building blocks, a watermark embedding system and a watermark recovery system or watermark extraction or detection system. Digital watermarking is an effective solution and newlinexxv newlineplays an important role in copyright protection. Digital Watermarking methods can be further sub categorized into spatial domain techn