Digital Image Watermarking Using DWT and SLR Technique Against Geometric Attack

Now days digital watermarking is very popular field for the researchers because it provide the better solutions for authentication and copyright protection problems of digital object. Digital watermarking is a highly evolving field, which involves the embedding of a certain kind of information under a digital object (image, video, audio) for the purpose of copyright protection. Both the image and the watermark are most frequently translated into a transform domain where the embedding takes place. The selection of both the transform domain and the particular algorithm that is used for the embedding of the watermark, depend heavily on the application. One of the most widely used transform domains for watermarking of still digital images is the Discrete Wavelet Transform (DWT) domain. In this paper we present a new algorithm which is more robust against different geometric attacks. Such as rotation and translation. Our algorithm has high embedding capacity, high imperceptibility and low calculating complexity.