A robust digital image watermarking technique based on wavelet transform

With the increasing use of internet and effortless copying, tempering and distribution of digital data, copyright protection for multimedia data has become an important issue. Digital watermarking emerged as a tool for protecting the multimedia data from copyright infringement. It is a technique for labeling multi-media data, including digital images, text documents, video and audio clips, by hiding secret information in the data. In this paper, we propose a digital image watermarking technique in the wavelet domain approach. It embeds the watermark in the components of the third band of the DWT of an image. Our experimental results prove that LL2 is the best region we can embed the watermark. The proposed technique is tested under Sharpen, Inverse, Gaussian, and Compress attacks to prove its robustness.