A DWT-DCT Based Blind Watermarking Algorithm for Copyright Protection

摘要：

Digital watermark technology is used to protect the legal owners copyrights. We propose a blind watermarking algorithm combination of Discrete Wavelet Transform (DWT) and Discrete Cosine Transform (DCT). The watermark is scrambled by Arnold and embedded in a spread spectrum pattern using pseudo random. The block-based DCT transform of DWT LL subband is computed and the pseudo random sequence of the watermark bits are embedded in the mid frequency coefficients of the corresponding DCT blocks. Using DWT prior to DCT to provide better imperceptibility and higher robustness against signal processing attacks. Experimental evaluation results show that combining the two transforms improved the performance of the watermarking algorithm based solely on DCT transform.

关键词： Arnold spread spectrum DWT DCT watermarking attacks

作者: Liu Ping Feng Liang Bin Zheng Peng Cao

作者单位: School of Information and Mechanical Engineering Beijing Institute of Graphic Communication Beijing, School of Information and Mechanical Engineering Beijing Institute of Graphic Communication Beijing,

会议类型: 国际会议

会议名称: 2010 3rd IEEE International Conference on Computer Science and Information Technology(第三届IEEE计算机科学与信息技术国际会议 ICCSIT 2010)

会议地点: 成都

会议语种:英文

页码: 455-458

在线出版日期: 2010-07-07（万方平台首次上网日期，不代表论文的发表时间）