On the Image Watermarking Techniques Applications, Properties and fields

Resume : L'expansion du world wide web et le volume sans cesse croissant de l'information digital (document, images, videos) mise a disposition du grand public, posent aujourd'hui un probleme crucial qui n'est autre que celui du copyright . Dans ce sens nous assistons au developpement de techniques representants tout un nouveau domaine : le Watermarking . Cet article presente un etat de l'art des techniques de watermarking ainsi q'un apercu de domaines ou ces techniques sont applicables. Mot cles : Watermarting/ FFT/ DCT/DWT. On the Image Watermarking Techniques Applications, Properties and fields Abstract :With the coming and the expansion of the World Wide Web an increased amount of digital information, such as documents, images audio and video data become available to a large number of people. Since the digital network is often used to offer digital media for profit, there is a strong need for copyright protection and a considerable interest in methods for inserting in a multimedia document a visible, or preferably invisible, mark to identify the owner. In this work, we present this new field with more details. An overview of watermarking properties, and a peer evaluation of different embedding domains is done in this work. Besides copyright protection, watermarking can serve to other applications. A survey of them and their respective requirements is also done. Key words : Watermarking/ FFT/ DCT/ DWT. Revue d'Information Scientifique & Technique Vol.12(2) 2002: 39-46