An Introduction to Robust Transform Based Image Watermarking Techniques

摘要: One of the important applications digital watermarking technology is copyright protection and ownership identification for images. To achieve this goal, robust has been rapidly developed in past decade or so. Robust designed to survive various non-geometric manipulations such as JPEG compression, additive noise filtering well some geometric distortions rotation scaling. In chapter, fundamental concept watermarking, differences between visible invisible blind non-blind watermark detection schemes, robust, fragile semi-fragile algorithms, four properties watermarking: imperceptibility, robustness, capacity security will be described. A number different transforms algorithms used image reviewed detail. These include block based Discrete Cosine Transform (DCT), non-block Wavelet (DWT) other state-of-the-art operating transform domain.