Research On Combining Image Digital Watermarking Technique Based On Wavelet Transform

With the evolution and booming of network and multimedia technology, Internet becomes one of the most important means for information spreading, but illegal copies and pirate come together with it. The research of digital watermarking becomes one of the hottest research topics, for it useful to copyright protection and contents authentication. Watermark could be damage in attack, so how to improve ability of watermarking Anti-attack is one of the most important questions. We presented a new idea about digital watermark that is combining image digital watermarking technique based on wavelet transform: two different watermarking signals were embedded in high frequency and low frequency of image using by image fusion and line add techniques .The experimental results have shown the proposed method is feasible and effective. The algorithm is simple and easy to realize. The embedded watermarks are not only adaptive to the original image but also highly robust and the extracted watermark information is easy to distinguish in different attacks, it is shown that the watermarks have a good ability in Anti-attacks.