Robust Multiple Image Watermarking Scheme using Discrete Cosine Transform with Multiple Descriptions

Abstract

A novel oblivious and robust multiple imagewatermarking scheme using Multiple Descriptions (MD) andQuantization Index Modulation (QIM) of the host image ispresented in this paper. Watermark embedding is done at twostages. In the first stage, Discrete Cosine Transform (DCT) ofodd description of the host image is computed. The watermarkimage is embedded in the resulting DC coefficients. In thesecond stage, a copy of the watermark image is embedded in thewatermarked image generated at the first stage. This enablesus to achieve robustness to both local and global attacks. Thisalgorithm is highly robust for different attacks on thewatermarked image and superior in terms of Peak Signal toNoise Ratio (PSNR) and Normalized Cross correlation (NC).

Keywords

• Digital Multimedia
• Embedded Algorithm
• Watermarking Scheme
• Compressed Images